The purpose of choosing two different metals as the reference to measure relative reduction potentials.
The process of determining the reduction potential of a metal necessitates the use of another metal for reference. A reference electrode with a well-known reduction potential is paired with the metal being studied as the working electrode to determine the reduction potential of the metal being studied.
There are a variety of reference electrodes available, but the standard hydrogen electrode is typically used as the reference electrode for electrochemical studies.
The standard hydrogen electrode's reduction potential has been calculated to be 0 volts. The reduction potential of a metal is a measure of the metal's tendency to gain electrons when it comes into touch with another substance. When a metal is oxidized or reduced, its reduction potential varies. As a result, when measuring reduction potentials, it is necessary to use two different metals as references.
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Calculate the number of vanadium atoms in a 50.0 sample of vanadium oxide (V2O5)
Can someone please help with this chemistry question
Molar mass of carbon dioxide is 44.01 g/mol. Thus, 9.2 moles of carbon dioxide will have a mass of 408.19 g.
What is carbon dioxide?Carbon dioxide (CO2) is a colorless, odorless gas that is naturally found in the Earth's atmosphere. It is one of the most important greenhouse gases and is the primary driver of global warming. Carbon dioxide is produced naturally by the respiration of living organisms, such as humans and animals, and by the decomposition of organic matter. It is also produced by burning fossil fuels and other industrial processes. Carbon dioxide is used in photosynthesis by plants, which convert it into oxygen and carbohydrates, providing the oxygen humans and animals need to breathe.
Molar mass of methane is 16.04 g/mol. Therefore, 408.19 g of carbon dioxide is equivalent to 25.5 moles of methane. This means that 25.5 moles of methane will have a mass of 408.19 g. Therefore, the answer is 408 g.
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In your village you have a challenge of water where the Walls have muddy water, and the barehold provide safty water that hardly quench increase it. Describe any scientific prod procedures that thirst but rather your you as a chemistry student can perform to make the village water clean and safe for consumption
Oxidation is the process of using oxygen to break down organic compounds in the water, such as certain chemicals, pesticides, and metals. This helps to make.
What is oxygen ?Oxygen is an essential element for all living things. It is a colorless, odorless, tasteless gas found naturally in air and is the most abundant element in the Earth’s atmosphere. Oxygen is a key component in the respiration process, allowing organisms to convert the energy stored in food into energy they can use. Without oxygen, life as we know it would cease to exist. Oxygen is also necessary for combustion, which allows us to use fire and fuel to power our homes, cars, and other technology. Oxygen is an incredibly important element and without it, nothing could survive.
1. Filtration: Filtration is an important step in treating water to make it safe for drinking. It involves passing the water through a filter to remove any impurities, such as dirt and other particles.
2. Disinfection: Disinfection is the process of using chemicals, such as chlorine, to kill any bacteria and other microorganisms in the water. This is an important step for making water safe for drinking.
3. pH Adjustment: pH is a measure of the acidity or alkalinity of a solution. If the pH of the water is not within the safe range, it can be adjusted using chemicals to make it safe for drinking.
4. Coagulation and Flocculation: Coagulation and flocculation involve adding chemicals to the water to bind together particles of dirt and other impurities. This makes it easier to remove them during the filtration process.
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Which of the following items are a liquid?
ice cubes
milk
rock
fog
rain
oxygen
Answer:
Milk
Explanation:
We aren't given the temperature and pressure conditions, so we must assume standard conditions of room temperature and 1 atmoshere pressure.
ice cubes NO. By definition, they are solid water.
milk YES, it is an emulsion, but still a liquid (not a solution)
rock NO, unless it is coming from a volcano
fog No, fog is small condensed water vapor droplets.
rain No, liquid
oxygen No, gas
Explain, in terms of molecular polarity, why oxygen gas has low solubility in water. (MUST INCLUDE BOTH OXYGEN AND WATER IN ANSWER.)
Answer:
O2 gas has low solubility in water because oxygen is a non-polar molecule whereas H2O (or water) is polar (due to the unequal sharing of electrons between the atoms and the unsymmetrical shape of the molecule - with a bent molecular structure).
Explanation:
Oxygen gas is a diatomic molecule, meaning that is has 2 oxygen molecules that are linked using a double bond. As a result, O2 gas can only dissolve in water (or H2O) by way of a dipole-induced dipole interaction or Van Der Waals. Another reason may be that O2 gas is covalently bonded (can't form ions) whereas H2O is ionically bonded with one another.
Oxygen gas has low solubility in water according to polarity and non polarity theory.
What is solubility?Solubility is the amount of solute that can be dissolved in a solvent. Generally, the solubility of most solutes increases with an increase in the temperature of the solvent.
The property that can help sugar molecules or salt crystals to dissolve is known as solubility.
Factors that affect solubility include:
Concentration of the solute
Temperature
Pressure
Polarity of the solute and the solvent
It has been observed that like molecules dissolve in like solvent. Polar molecules can only be soluble in polar solvent. Water is a polar solvent but Oxygen molecule is linear molecule with only Oxygen atoms hence no polarity.
Therefore, Oxygen gas has low solubility in water according to polarity and non polarity theory.
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grams of Fe₂O3:
g Fe₂0;
71.86 grams of Fe2O3 can form from 21.6 grams of O2.
How to solveTo determine the amount of Fe2O3 that can form from 21.6 g of O2, we need to use the balanced chemical equation and the stoichiometry of the reaction.
According to the balanced chemical equation:
4 Fe(s) + 3 O2(g) → 2 Fe2O3(s)
The stoichiometric ratio of O2 to Fe2O3 is 3:2. This means that for every 3 moles of O2, 2 moles of Fe2O3 are produced.
To calculate the amount of Fe2O3 formed, we need to first convert the mass of O2 given to moles:
n(O2) = m(O2) / M(O2)
where:
m(O2) is the mass of O2 given in the problem, which is 21.6 gM(O2) is the molar mass of O2, which is 32.00 g/moln(O2) = 21.6 g / 32.00 g/mol = 0.675 mol O2Next, we can use the stoichiometric ratio to calculate the number of moles of Fe2O3 formed:
n(Fe2O3) = 2/3 x n(O2)
n(Fe2O3) = 2/3 x 0.675 mol = 0.450 mol
Finally, we can convert the number of moles of Fe2O3 to grams using its molar mass:
m(Fe2O3) = n(Fe2O3) x M(Fe2O3)
where:
M(Fe2O3) is the molar mass of Fe2O3, which is 159.69 g/molm(Fe2O3) = 0.450 mol x 159.69 g/mol = 71.86 gTherefore, 71.86 grams of Fe2O3 can form from 21.6 grams of O2.
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How many grams of [tex]Fe_2O3[/tex] can form from 21.6g of [tex]O_2[/tex]
[tex]4Fe(s) + 3O_2(g) -------- > 2Fe_2O_3(s)[/tex]
The molecular formula for glucose is c6h12o6. What would be the molecular formula for a polymer made by linking ten glucose molecules together by dehydration reactions?
This polysaccharide has the molecular formula C₆₀H₁₀₂O.
When ten glucose molecules are linked together by dehydration reactions, a polymer is formed called a polysaccharide. The molecular formula of this polysaccharide can be derived by adding the molecular formula of ten glucose molecules and subtracting the number of water molecules released during the polymerization process.
The molecular formula of one glucose molecule is C₆H₁₂O₆. When ten glucose molecules are linked together, ten water molecules are released, one for each bond formed. Therefore, the molecular formula for the polymer made by linking ten glucose molecules together by dehydration reactions would be:
(C₆H₁₂O₆)10 - (H₂O)10 = C₆₀H₁₀₂O₅₁
So the molecular formula for this polysaccharide is C₆₀H₁₀₂O₅₁. This type of polysaccharide is commonly found in nature, including starch in plants and glycogen in animals.
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Select the answer with the correct number of significant figures for each calculation. (6.022 × 1023) × 2.58 = 1.55 × 1024 1.554 × 1024 1.5537 × 1024
The calculation is correct with "1.55 × 10^24" three significant figures.
What is the significance of significant figures in scientific calculations?Significant figures are important in scientific calculations because they indicate the precision and accuracy of a measurement or calculation. They help ensure that the final result reflects the level of precision of the original measurements.
How do you determine the number of significant figures in a calculation?The general rule for determining significant figures is that any digit that is not zero is significant, as well as any zero between significant digits. Zeros to the left of the first nonzero digit are not significant. When adding or subtracting, the result should be rounded to the same number of decimal places as the least precise measurement. When multiplying or dividing, the result should be rounded to the same number of significant figures as the measurement with the least significant figures.
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Single Replacement Reactions
Calcium + Lead (II) nitrate →
Answer:
Ca(NO3) + Pb
Explanation:
that,s the proper equation
Please help me with this question 3.2.1-3.2.2
In mathematics, a dimension is the length or width of an area, region, or place in one way.
What is dimension?The minimal number of numbers required to describe any location within a mathematical space (or object) is known as the dimension in physics and mathematics. Because only one coordinate is required to describe a position on a line, such as the point at 5 on a number line, a line is said to have one dimension (1D).
Because two coordinates are necessary to define a point on a surface, such as the perimeter of a sphere or cylinder, it is referred to as having a dimension of two (2D). For instance, a point on the surface of a sphere requires both a latitude and a longitude to be located.
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What is the temperature of 4. 5 moles of nitrogen gas when it has a pressure of 4. 5 atm and a volume of 3L
The temperature of 4.5 moles of nitrogen gas when it has a pressure of 4.5 atm and a volume of 3L is 36.6 K.
PV = nRT is the formula for the ideal gas equation. In this equation, P denotes the ideal gas's pressure, V the volume of the ideal gas, n the total amount of ideal gas measured in moles, R the universal gas constant, and T the temperature.
We have,
PV = nRT
4.5 x 3 = 4.5 x 0.082 x T
T = 3/0.082
T = 36.6 K
An equation that matches the product of a gas's pressure and volume to the product of its thermodynamic temperature and the gas constant. For an ideal gas, the equation is accurate, but for actual gases at low pressures, it is a decent approximation. Also known as the ideal gas equation and the ideal gas law.
Numerous gases, including nitrogen, oxygen, hydrogen, noble gases, heavier gases like carbon dioxide, and mixes like air, can be regarded as ideal gases within tolerable tolerances across a wide parameter range centred on normal temperature and pressure.
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To earn full credit for your answers, you must show the appropriate formula, the correct substitutions , and your answer including the correct units
Star City has 4.2 x 106 people has 1.9 x103 deaths. What is the death rate?
The death rate in Star City is 0.452 deaths per 1000 people.
What is the death rate?
The death rate is the number of deaths per unit of population. It is calculated by dividing the number of deaths by the total population and multiplying the result by 1000 to express it per 1000 people.
The formula for death rate is:
Death rate = (Number of deaths / Total population) x 1000
Substituting the given values:
Death rate = (1.9 x 10³ / 4.2 x 10⁶) x 1000
Simplifying the expression:
Death rate = 0.000452 x 1000
Death rate = 0.452 deaths per 1000 people
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Which of the following organisms typically have more than one form of east of each gene from can mask the appearance another form that form is considered _____ the other form
Which of the following organisms typically have more than one form of east of each gene from can mask the appearance another form that form is considered dominant the other form,
Are both of an organism's alleles identical when it possesses homozygosity for a given gene?Each gene in each of us has two alleles, or variations. If you inherit two identical copies of a gene, you are said to be homozygous for that gene. In contrast, a genotype with distinct alleles is called a heterozygous genotype. Individuals with recessive characteristics, such as red hair or blue eyes, are always homozygous for that gene.
if a trait has two equally expressed alleles and none can prevent the expression of the other allele This is an illustration of codominance, a genetic phenomena in which the expression of two alleles (differing variants of the same gene) within an organism is equal. The features linked to each allele are therefore displayed concurrently.
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A student measured 266 mL of 0.260 M HCl solution into a beaker. How many moles of HCI were in the beaker? n(HCI) = ___ mol
Answer:
To calculate the number of moles of HCl in the solution, we can use the formula:
moles = concentration x volume
where concentration is in units of moles per liter (M), and volume is in units of liters (L).
Converting the given volume to liters:
266 mL = 266/1000 L = 0.266 L
Substituting the given values into the formula:
moles = 0.260 M x 0.266 L
moles = 0.06896 mol
Therefore, the number of moles of HCl in the solution is 0.06896 mol (rounded to five significant figures).
if there are 7 moles of H2 and 8 moles of O2 how many water molecules can you make
Answer:
Explanation:
The balanced chemical equation for the reaction of hydrogen gas (H2) with oxygen gas (O2) to form water (H2O) is:
2H2 + O2 → 2H2O
According to the equation, 2 moles of H2 react with 1 mole of O2 to produce 2 moles of H2O. Therefore, to determine how many water molecules can be made from 7 moles of H2 and 8 moles of O2, we need to determine which reactant is limiting and calculate the amount of product that can be formed based on the limiting reactant.
To do this, we can calculate the moles of H2O that can be produced from each reactant and choose the smaller value as the limiting reactant.
From 7 moles of H2, we can produce:
(7 moles H2) x (2 moles H2O / 2 moles H2) = 7 moles H2O
From 8 moles of O2, we can produce:
(8 moles O2) x (2 moles H2O / 1 mole O2) = 16 moles H2O
Since we can only produce 7 moles of H2O from the H2, but we can produce 16 moles of H2O from the O2, the H2 is the limiting reactant. Therefore, the maximum amount of water molecules that can be produced is:
(7 moles H2) x (2 moles H2O / 2 moles H2) = 7 moles H2O
Finally, we can convert moles of H2O to the number of water molecules by multiplying the moles by Avogadro's number:
(7 moles H2O) x (6.02 x 10^23 molecules/mole) = 4.22 x 10^24 molecules of H2O
Therefore, from 7 moles of H2 and 8 moles of O2, we can make 4.22 x 10^24 water molecules.
12.259 g of a compound containing only copper and oxygen was decomposed it produced 2.410 g of oxygen. how many grams of copper were in the compound?
The mass of copper in the compound is 4.765 g because the complex's mass was 12.259 g.
The equation for the decomposition of the copper oxide compound is:
[tex]CuO \rightarrow Cu + O_2[/tex]
Given that 2.410 g of oxygen was produced, we can calculate the amount of copper present in the compound.
We know that 1 mole of oxygen has a mass of 32 g. So the mass of 2.410 g of oxygen is equal to ([tex]\frac{2.410 g }{ 32 g/mol}[/tex]) = 0.075 moles of oxygen.
Since the reaction is a 1:1 ratio, the same amount of moles of copper must have been present in the compound.
The mass of copper in the compound is equal to (0.075 moles x 63.546 g/mol) = 4.765 g.
Since the mass of the compound was 12.259 g, the mass of copper in the compound is 4.765 g.
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name the first 20 element
Answer:
Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminum, Silicon, Phosphorus, Sulphur, Chlorine, Argon, Potassium, Calcium
Let me know if this helps
A reaction vessel contains 6. 300 g of CO and 6. 300 g of O2. How many grams of CO2 could be produced according to the following reaction?
The grams of CO2 that could have been produced according to the reaction is 21.2 grams.
We apply the stoichiometric principles to calculate the potential yield of a particular mixture of chemicals. To determine the mole to mole correlations between the chemical species in stoichiometry, we apply the balanced chemical equation. The theoretical yield is the highest yield that can be estimated from the starting reagent quantities. The amount collected is known as the actual yield, and frequently we discover that the theoretical yield is not achieved.
The balanced chemical equation is:
2CO + O₂ → 2CO₂
Molar Mass CO = 28.0 grams per mole
Molar Mass O2 = 32.0 grams per mole
Molar Mass CO2 = 44.0 grams per mole
We determine the maximum quantity of carbon dioxide that may be produced from each reagent based on their initial concentrations. This assumes that there is an excess of the other reagent.
13.5 g CO x 1 mol CO / 28 g CO x 2 mol CO₂ / 2 mol CO x 44 g CO₂
= 21.2 g CO₂
Therefore, grams of CO2 could be produced is 21.2 g.
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Complete question:
A reaction vessel contains 6. 300 g of CO and 6. 300 g of O2. How many grams of CO2 could be produced according to the following reaction?
2CO + O₂ ----> 2CO₂
1.What is the formula for tritellurium dichlorodie?
2.What is the formula for diselenium hexasulfid ?
Answer:
Explanation: Te3Cl2
Se2 S6
Just make the number small like subscripts
Many common things you use regularly are colloids except.......
-milk
-hair
-spray
-paint
-alloy
Many common things you use regularly are colloids except alloy.
What is an alloy?An alloy is a solid solution composed of two or more metals or a metal and a non-metal element. In contrast, colloids are mixtures where one substance is dispersed throughout another substance in the form of small particles that do not settle out.
What are colloids?Colloids are mixtures composed of particles that are intermediate in size between those of a solution and a suspension. These particles are typically between 1 and 1000 nanometers in diameter, which is too small to be seen with the eye, but large enough to scatter light, giving the mixture a cloudy or opaque appearance.
Milk, hair, spray, and paint are all examples of colloids.
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The reaction between copper oxide and carbon can be used to make copper metal.
The equation for this reaction is:
2CuO(s) + C(s) → 2Cu(s) + CO2(g)
A mixture of 4.0 g of CuO and 1.2 g of carbon is heated.
Calculate the number of moles in 4.0 g of CuO
Answer:
The molar mass of CuO is 63.55 g/mol for copper and 15.9994 g/mol for oxygen, giving a total molar mass of 79.55 g/mol.
To calculate the number of moles in 4.0 g of CuO, we can use the formula:
moles = mass / molar mass
moles of CuO = 4.0 g / 79.55 g/mol
moles of CuO = 0.0502 mol
Therefore, there are 0.0502 moles in 4.0 g of CuO.
A microbiologist is preparing a medium on which to culture E. Coli bacteria. She buffers the medium at pH 7. 00 to minimize the effect of acid-producing fermentation. What volumes of equimolar aqueous solutions of K2HPO4 and KH2PO4 must she combine to make 250. 0 mL of the pH 7. 00 buffer?
The volumes 447.0 mL and 353.0 mL of equimolar aqueous solutions of K2HPO4 and KH2PO4 must she combine to make 250. 0 mL of the pH 7. 00 buffer solution.
A buffer solution is defined as a solution when an acid or a base is in equilibrium with its conjugate base or acid and because of that, when other acid or base is added to the solution, the pH remains almost unaltered. It is a water solvent based solution which consists of a mixture containing a weak acid and the conjugate base of the weak acid or a weak base and the conjugate acid of the weak base. Buffer resist a change in pH upon dilution or upon the addition of small amounts of acid or alkali to them.
The pH of a buffer can be calculated by the expression of Henderson–Hassel Balch equation,
pH = pKa + log[A-]/[HA]
Here, pKa is the equilibrium constant of the acid and A- is the conjugate base and [HA] is the acid.
(n1/V1)/(n2/V2) = 0.79
(n1/V1)*(V2/n2) = 0.79
Because n1 = n2,
V2/V1 = 0.79
V2 = 0.79V1
The total volume must be 800.0 mL, so
V1 + V2 = 800.0
V1 + 0.79V1 = 800.0
1.79V1 = 800.0
V1 = 447.0 mL
V2 = 353.0 mL
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what would happen to the temperature and physical state of 1 mol of liquid diethyl ether at its standard boiling point if its molar enthalpy of vaporization (26.52 kj/mol) were added?
When 1 mol of liquid diethyl ether at its standard boiling point is given an enthalpy of vaporization of 26.52 kJ/mol, the temperature of the liquid will remain the same, but the physical state of the diethyl ether will change from liquid to vapor.
The enthalpy of vaporization is the energy required to convert one mole of a liquid into a vapor and is also known as the heat of vaporization. When the enthalpy of vaporization is applied to liquid diethyl ether, it causes the liquid to become a vapor.
In order to understand this concept, it is helpful to look at the thermodynamic process of vaporization, or boiling. Vaporization involves the conversion of liquid to a gas at the standard boiling point by the absorption of energy, which is provided in the form of heat.
During vaporization, the liquid molecules move quickly and gain enough energy to escape the surface of the liquid and form a gas. This process is also reversible, so as the vaporized molecules lose energy, they can condense back into the liquid state.
Therefore, the temperature remains the same, but the liquid is converted to a vapor. This vapor can eventually condense back into liquid form, depending on the temperature and pressure of the system.
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Can someone please help with this chemistry question
According to the question the Cameron's percent yield is 63.0%.
What is yield?Yield is the return on an investment over a specified period of time, usually expressed as a percentage. Yield is typically calculated by taking the income generated from an investment, such as dividends or interest, and dividing it by the total amount of capital invested. Yield can also refer to the rate of return on a bond or other fixed-income security, which is determined by the coupon rate, current market price, and time remaining until maturity.
Cameron's percent yield can be calculated by dividing the actual yield by the theoretical yield and multiplying by 100.
In this case, the calculation is (14.8/23.4)*100=63.2%.
Therefore, Cameron's percent yield is 63.2%. yield of 23.4 g of magnesium oxide, and then multiplying by 100.
Therefore, the equation is (14.8 g/23.4 g) x 100 = 63.0%.
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The graphic below is based on the Bohr model of an atom in the ground state.
12 n
12 p
OB. The atom is in group 1 and period 2.
OC. The atom is in group 2 and period 3.
OD. The atom is in group 2 and period 4.
282
Which most likely identifies the location of the element on the modern periodic table?
O A. The atom is in group 1 and period 1.
Answer:
Explanation:
Based on the information given in the graphic, we can determine that the atom has 12 protons and 12 neutrons, which would give it an atomic mass of 24. However, the graphic does not provide information about the number of electrons, which would be necessary to determine the element's location on the modern periodic table.
Therefore, none of the answer choices provided can be determined from the information given. We cannot identify the group or period of the element on the modern periodic table based solely on the number of protons and neutrons in the atom.
please answer these two questions quickly, i wasn’t here when we learnt this.
Each atom on both sides of a balanced chemical equation has the same number and type. A balanced equation's coefficients must have the simplest whole number ratio. In chemical processes, mass is always preserved.
What is an example of a balanced chemical equation?Consider the following reaction: 2Mg(s)+O2(g)2MgO(g), Two atoms of magnesium and oxygen are present on both the reactant and product sides of this reaction. As a result of obeying the rule of conservation of mass, the chemical reaction is a balanced chemical equation.
A balanced chemical equation is one in which the number of each type of atom on both sides of the equation is equal. Subscripts are elements in the chemical formulae of reactants and products that denote the number of atoms of the previous element.
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A mixture of oxygen (O2), carbon dioxide (CO2), and nitrogen (N2) has a total
pressure of 0. 97 atm. What is the partial pressure of O2, if the partial pressure
of CO2 is 0. 70 atm and the partial pressure of N2 is 0. 12 atm?
The partial pressure of oxygen (O₂) in the mixture is 0.15 atm.
The partial pressure of oxygen (O₂) can be found using the equation:
Total pressure = Partial pressure of O₂ + Partial pressure of CO₂ + Partial pressure of N₂
Or, mathematically:
P_total = P_O₂ + P_CO₂ + P_N₂
We are given that the total pressure is 0.97 atm, the partial pressure of CO₂ is 0.70 atm, and the partial pressure of N₂ is 0.12 atm. Substituting these values into equation, we get:
0.97 atm = P_O₂ + 0.70 atm + 0.12 atm
Simplifying:
0.97 atm = P_O₂ + 0.82 atm
Subtracting 0.82 atm from both sides:
0.97 atm - 0.82 atm = P_O₂
0.15 atm = P_O₂
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in the decomposition of hydrogen peroxide, you follow the reaction by studying the production of oxygen gas in a wash bottle, which displaces water out of the bottle. where should you measure the temperature to characterize the gas? select one: about two inches above the bottle above the liquid level in the bottle in the displaced water in the test tube in the liquid in the bottle
In the decomposition of hydrogen peroxide, you follow the reaction by studying the production of oxygen gas in a wash bottle, which displaces water out of the bottle. The location where you should measure the temperature to characterize the gas is about two inches above the bottle.
The decomposition of hydrogen peroxide is the process of breaking down hydrogen peroxide into water and oxygen. This reaction occurs spontaneously in the presence of light or in the presence of a catalyst. Hydrogen peroxide is a strong oxidizing agent that is widely used in industry and medicine.
You should measure the temperature of the gas about two inches above the bottle to characterize the gas. Since the production of oxygen gas takes place in the wash bottle and displaces water out of the bottle, the displaced water is not a good location to measure the temperature. Similarly, the temperature of the gas cannot be measured inside the test tube or in the liquid in the bottle. To obtain an accurate measurement of the temperature of the gas produced in the reaction, you should measure the temperature of the gas about two inches above the bottle. This is because the temperature of the gas will be closest to the actual temperature of the gas in this location.
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Please help me fast
Calculate the molar mass of the following substances
a) To convert 1.65 moles of magnesium chloride to grams, we need to first determine the molar mass of MgCl.
The molar mass of MgCl is the sum of the atomic masses of magnesium and chlorine:
Mg: 24.31 g/mol
Cl: 35.45 g/mol
Molar mass of MgCl = 24.31 g/mol + 35.45 g/mol = 59.76 g/mol
Now, we can use the molar mass to convert 1.65 moles to grams:
1.65 moles x 59.76 g/mol = 98.70 grams
Therefore, 1.65 moles of MgCl is equal to 98.70 grams.
b) To convert grams of Na2CO3 to moles, we need to first determine the molar mass of Na2CO3.
The molar mass of Na2CO3 is the sum of the atomic masses of sodium, carbon, and oxygen, taking into account the two sodium atoms in each molecule:
Na: 22.99 g/mol
C: 12.01 g/mol
O: 16.00 g/mol
Molar mass of Na2CO3 = (2 x 22.99 g/mol) + 12.01 g/mol + (3 x 16.00 g/mol) = 105.99 g/mol
Now, we can use the molar mass to convert grams to moles:
1 grain = 0.06479891 grams
10 grains = 0.6479891 grams
0.6479891 g / 105.99 g/mol = 0.0061 moles
Therefore, 10 grains (0.6479891 grams) of Na2CO3 is equal to 0.0061 moles.
What is molar mass example?The molar mass (M) of a chemical product is described in chemistry as the ratio of mass to substance (measured in moles) of any sample of said molecule. The molar mass of a material is a bulk characteristic, not a molecular trait. The molar mass is an average of many occurrences of the compound, which often differ in mass due to isotopes present.
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The mοlar mass οf MgCl₂ is 95.21 g/mοl.
It is calculated by summing the atοmic masses οf all the atοms in a mοlecule οr fοrmula unit οf a substance. Mοlar mass is an impοrtant cοncept in chemistry because it allοws us tο relate the mass οf a substance tο the number οf particles (atοms, mοlecules, οr iοns) in it.
The mοlar mass οf MgCl₂ (Magnesium chlοride) can be calculated by adding the atοmic masses οf magnesium (Mg) and chlοrine (Cl) atοms in the cοmpοund.
The atοmic mass οf magnesium (Mg) is 24.31 g/mοl, and the atοmic mass οf chlοrine (Cl) is 35.45 g/mοl (apprοx). MgCl₂ has οne magnesium atοm and twο chlοrine atοms, sο its mοlar mass can be calculated as:
Mοlar mass οf MgCl₂ = (1 x 24.31 g/mοl) + (2 x 35.45 g/mοl)
= 24.31 g/mοl + 70.90 g/mοl
= 95.21 g/mοl
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Match
1)solutions
2)colloids
3)suspensions
smaller than 1 nm
larger than 1000 nm
1 nm to 1000 nm
Answer:
Solutions - smaller than 1 nm
Colloids - 1 nm to 1000 nm
Suspensions - larger than 1000 nm