Answer:
D
Explanation:
It is parasitism because only the tapwworm benefits from the host
The combustion of ethane (C2H6) produces CO2 and H2O:
2C2H6 (g) + 7O2 (g) → 4CO2 (g) + 6H2O (g)
How many moles of O2 are needed to react with 15.5 g of ethane?
When 3 g of a petroleum are burned with more oxygen than is required, 8.8 g of Atmospheric carbon dioxide plus 5.4 g liquid [tex]H_{2}O[/tex] are produced.
What happens when ethane gas ([tex]C_{2}H_6}[/tex]) and oxygen gas ([tex]O_{2}[/tex]) burn together?
Oxygen gas and ethane ([tex]C_{2}H_6}[/tex]) react to create water as well as carbon dioxide. Find the total quantity of carbon dioxide created when the reaction yield is 60% when 5 mol of methane is burned and 16 mol of oxygen initially. 2[tex]C_{2}H_4}[/tex]+7[tex]O_{2}[/tex] →4[tex]CO_{2}[/tex]+6[tex]H_{2}O.[/tex]
How many tumours of CO2 are created when 2.2 blackheads of [tex]C_{2}H_4}[/tex]are burned?
As a result, 2 m of carbon dioxide is generated from mole of a substance of [tex]C_{2}H_4} .[/tex] Thus, multiply 2.2 over 2 by 1 pot to get 2.2 moles for c into h or just a cross. It consists of 4.4 moles of carbon.
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CaCO3 + 2HCI =CaCl2 + H₂O + CO2
5. Calcium carbonate (CaCO3) combines with HCl to produce calcium chloride (CaCl₂),
water, and carbon dioxide gas (CO₂). How many grams of HCI are required to react with
6.35 mol CaCO3?
463.5 grams of HCl are required to react with 6.35 moles of CaCO₃.
What is meant by molar mass?Mass of one mole of substance is referred to as the molar mass. The molar mass of a substance can be calculated by adding up the atomic masses of all the atoms in a molecule.
Balanced chemical equation for the reaction between calcium carbonate (CaCO₃) and hydrochloric acid (HCl) is: CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂
6.35 mol CaCO₃ * 2 mol HCl / 1 mol CaCO₃ = 12.7 mol HCl
Now, we use the molar mass of HCl (36.46 g/mol) to convert from moles to grams: 12.7 mol HCl * 36.46 g/mol = 463.5 g HCl
Therefore, 463.5 grams of HCl are required to react with 6.35 moles of CaCO₃.
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if only 11.00g SnF2 were produced calculate percent yield
A. The mass (in grams) of SnF₂ that can be produced theoretically from the reaction is 13.20 g
B. The percentage yield of the reaction is 83.3%
A. How do i determine the mass produced theoretically?The mass of SnF₂ produced theorethically, can be obtained as shown below:
Sn + 2HF -> SnF₂ + H₂
Molar mass of Sn = 118.71 g/molMass of Sn from the balanced equation = 1 × 118.71 = 118.71 g Molar mass of SnF₂ = 156.71 g/molMass of SnF₂ from the balanced equation = 1 × 156.71 = 156.71 gFrom the balanced equation above,
118.71 g of Sn reacted to produce 156.71 g of SnF₂
Therefore,
10 g of Sn will react to produce = (10 × 156.71) / 118.71 = 13.20 g of SnF₂
Thus, the mass of SnF₂ produced is 13.20 g
B. How do i determine the percentage yield?The percentage yield for the reaction can be obtained as follow:
Actual yield of SnF₂ = 11 gTheoretical yield of SnF₂ = 13.20 gPercentage yield of SnF₂ =?Percentage yield = (Actual /Theoretical) × 100
Percentage yield of SnF₂ = (11 / 13.20) × 100
Percentage yield of SnF₂ = 83.3%
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Complete question:
See attached photo
Question 4 of 10
Based on information from the periodic table, what does this image
represent?
= 9 Protons
= 10 Neutrons
= 10 Electrons
A.Neutral fluorine
B. A positively charged fluoride ion
C. A negatively charged fluoride ion
D. A neutral neon atom
For a gaseous reaction, standard conditions are 298 K and a partial pressure of 1 atm for all species.
For the reaction
N2(g)+3H2(g)↽−−⇀2NH3(g)
the standard change in Gibbs free energy is Δ°=−32.8 kJ/mol
. What is ΔG for this reaction at 298 K when the partial pressures are N2=0.350 atm
, H2=0.300 atm
, and NH3=0.750 atm
?
The ΔG for the reaction at 298 K and the given partial pressures is -55.53 kJ/mol.
What is ΔG ?
The Gibbs free energy change for a reaction under non-standard conditions can be calculated using the following equation:
ΔG = ΔG° + RTln(Q)
where ΔG is the Gibbs free energy change, ΔG° is the standard Gibbs free energy change, R is the gas constant (8.314 J/(mol·K)), T is the temperature in kelvin, and Q is the reaction quotient.
The reaction quotient, Q, can be calculated using the partial pressures of the gases involved in the reaction:
Q = (P(NH3))² / (P(N2) x P(H2)³)
Plugging in the given values, we get:
Q = (0.75 atm)² / (0.35 atm x 0.30 atm³) = 0.2667
Now we can calculate the ΔG for the reaction:
ΔG = ΔG° + RTln(Q)
ΔG = (-32.8 kJ/mol) + (8.314 J/(mol·K) x 298 K x ln(0.2667))
ΔG = -32.8 kJ/mol + (-22.73 kJ/mol)
ΔG = -55.53 kJ/mol
Therefore, the ΔG for the reaction at 298 K and the given partial pressures is -55.53 kJ/mol.
What is reaction quotient?
Reaction quotient, commonly denoted as Q, is a measure of the relative concentrations of reactants and products in a chemical reaction at a particular moment in time. It is calculated by dividing the concentration of the products raised to their stoichiometric coefficients by the concentration of the reactants raised to their stoichiometric coefficients.
The equation for the reaction quotient Q is similar to the equilibrium constant Kc, but with the concentrations of the reactants and products at any time during the reaction, rather than at equilibrium. When the reaction is at equilibrium, the reaction quotient is equal to the equilibrium constant.
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What are two basic aspects of science?
The Two Aspects of Science: Control over nature and understanding of nature must both be held in equal honor.
what volume of SO3 would be produced by complete reaction of 100cm3 of HO2 with O2?
The volume of [tex]SO_{3}[/tex] would be produced by complete reaction of 100cm3 of [tex]H_{2}O[/tex]with [tex]O_{2}[/tex] is at STP is 60.03L.
Volume22.4 L divided by 2.68 moles per mole yields 60.03 L [tex]SO_{3}[/tex].
describing the elements contributing to the response,
[tex]2SO_{2(g)}+ O_{2} = 2SO_{3}[/tex]
In this instance, [tex]SO_{3}[/tex] and [tex]O_{2}[/tex] have a mole ratio of 2:1. Assume the reaction takes place at STP, where 1 mole of any gas has a volume of 22.4 L. Consequently, 30 [tex]dm^{3}[/tex]of [tex]O_{2}[/tex] (1 dm3 = 1 L) equals 30 L of [tex]O_{2}[/tex] and 30 L/22.4 L times 1 mole equals 1.34 moles of [tex]O_{2}[/tex].
According to stoichiometry, when 1.34 moles of [tex]O_{2}[/tex]are reacted with [tex]SO_{2}[/tex], 2.68 moles of [tex]SO_{3}[/tex] are created, or 2/1 x 1.34 moles of [tex]SO_{3}[/tex].
This means that the amount of [tex]SO_{3}[/tex]produced will be (2.68 moles/1 mole) x 22.4 L = 60.03 L [tex]SO_{3}[/tex].
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why does glass containing an iced beverage feel cold
Answer:
Molecules in the skin are moving faster than molecules in the glass.
Explanation:
Put it in your own words.
Answer:
The energy from the ice transferred to the glass.
Which of the conditions is always true at equilibrium?
The conditions at reaction equilibrium are;
ΔG°= 0ΔG = 0K = 1What are the conditions for a reaction at equilibrium?A chemical reaction is said to be at equilibrium when the rate of the forward reaction is equal to the rate of the reverse reaction. At equilibrium, the concentrations of reactants and products remain constant over time, although the individual molecular collisions and reactions are still taking place.
The equilibrium constant (Kc) is a constant value that relates the concentrations of the reactants and products at equilibrium. The value of Kc is determined by the stoichiometry of the reaction and the equilibrium concentrations of the reactants and products.
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Which of these pairs of atoms would experience a polar covalent bond?
Cl and Cl
K and Br
P and S
C and O
C and O since their electronegativity differs by quite a lot
what is the compound formed between two or more non metal element that share electron
A compound formed between two or more non-metal elements that share electrons is called a covalent compound or a molecular compound.
In covalent compounds, the atoms share electrons in order to achieve a full outer shell of electrons and become more stable. Covalent compounds typically have low melting and boiling points, are often gases or liquids at room temperature, and are poor conductors of electricity. Examples of covalent compounds include water (H2O), carbon dioxide (CO2), and methane [CH4].
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The equation below represents the dissociation of vinegar which is a weak acid. How can you tell that it is an acid and it is weak? Just from looking at the equation.
Because it is not very effective at transferring [tex]H^{+}[/tex] ions to water, vinegar is a weak acid. Less than 0.4% of the [tex]CH_{3}CO_{2}H[/tex]molecules in a 1 M solution interact with water to create [tex]H_{3}O^{+}[/tex]and [tex]CH_{3}CO_{2}^{-}[/tex] ions. More than 99.6% of the acetic acid molecules are still whole.
Weak acidsAcids that partially dissociate in solution are referred to as weak acids. To put it another way, a weak acid is any acid that is not a strong acid. A weak acid's strength is influenced by how much it dissociates; the more it dissociates, the stronger the acid.In comparison to weak acids, strong acids have a lower pH. 2) Strong acids dissociate more, resulting in a lower pH (greater concentration of [tex]H^{+}[/tex] ions in solution). 3) This can be verified by usingFor more information on weak acid kindly visit to
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sample of gas in a balloon has an initial temperature of 42 ∘C
and a volume of 1.47×103 L
. If the temperature changes to 94 ∘C
, and there is no change of pressure or amount of gas, what is the new volume, V2
, of the gas?
The new volume [tex]V_{2}[/tex]) of the gas is approximately 1710 L when the temperature changes from 42 ∘C to 94 ∘C, assuming no change in pressure or amount of gas.
What is Temperature?
Temperature is a measure of the average kinetic energy of the particles in a substance, such as a gas, liquid, or solid. It is commonly measured in Celsius (°C), Fahrenheit (°F), or Kelvin (K) scales. Temperature determines the direction of heat transfer, which is the movement of energy between substances due to a temperature difference.
To use the ideal gas law, we need to convert the temperatures to Kelvin by adding 273.15 to each:
[tex]T_{1}[/tex] = 42 + 273.15 = 315.15 K
[tex]T_{2}[/tex]= 94 + 273.15 = 367.15 K
Since the pressure, amount of gas, and ideal gas constant remain constant in this problem, we can set up the following ratio:
([tex]V_{1}[/tex] / [tex]T_{1}[/tex]) = ([tex]V_{2}[/tex]/ [tex]T_{2}[/tex])
Plugging in the values:
(1.47 ×[tex]10^{3}[/tex]L / 315.15 K) = ([tex]V_{2}[/tex] / 367.15 K)
Now we can solve for [tex]V_{2}[/tex]:
[tex]V_{2}[/tex] = 1.47×[tex]10^{3}[/tex] L * 367.15 K / 315.15 K
[tex]V_{2}[/tex]≈ 1710 L (rounded to three significant figures)
Therefore, the new volume (V2) of the gas is approximately 1710 L when the temperature changes from 42 ∘C to 94 ∘C, assuming no change in pressure or amount of gas.
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Given:
2KI → 2K + I2
Calculate the number of moles of iodine produced in the decomposition of 7.0 moles of potassium iodide (KI). Express your answer to the correct number of significant figures.
Since 2 moles of KI produce 1 mole of I2, then 7.0 moles of KI will produce 7.0/2 moles of I2. In other words, 3.5 moles of I2 will be produced
Which of the following atoms has the largest atomic radius?
Sr
At
I
Ba
I think it is Ba since the radius increases along the group.but decreases along the period
Answer:
Ba
Explanation:
Ba
The calcium and magnesium in a urine sample were precipitated as oxalates. A mixed precipitate of calcium oxalate (CaC2O4) and magnesium oxalate (MgC2O4) resulted and was analysed by gravimetry. The formed precipitate mixture was heated to form calcium carbonate (CaCO3) and magnesium oxide (MgO) with a total mass of 0.0433 g. The solid precipitate mixture was ignited to form CaO and MgO, the resulting solid after ignition weighed 0.0285 g. What was the mass of calcium in the original sample? All answers should be reported with the correct significant figures
The mass of calcium in the original urine sample would be 0.0140 g.
Stoichiometric problemFirst, we need to find the masses of calcium and magnesium oxalates in the original sample. Let x be the mass of calcium oxalate and y be the mass of magnesium oxalate. Then we have:
x + y = mass of the mixed oxalate precipitate
Next, we need to use the information given to find the mass of calcium in the original sample. The mass of calcium oxide formed after ignition is equal to the mass of calcium oxalate in the original sample. We can calculate the mass of calcium oxide using the mass of calcium carbonate formed and the molar mass ratio of calcium carbonate to calcium oxide.
The balanced chemical equations for the reactions are:
CaC2O4 -> CaCO3 + CO2
CaCO3 -> CaO + CO2
The molar mass of CaCO3 is 100.09 g/mol, and the molar mass of CaO is 56.08 g/mol.
From the given information, we have:
0.0433 g = (x + y)(100.09 g/mol + 80.15 g/mol) / (128.10 g/mol + 80.15 g/mol)
0.0285 g = x(56.08 g/mol) + y(40.31 g/mol)
Solving these equations simultaneously, we get:
x = 0.0140 g
y = 0.0053 g
Therefore, the mass of calcium in the original sample (which is equal to the mass of calcium oxide formed after ignition) is:
0.0140 g
So the mass of calcium in the original sample is 0.0140 g.
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how many moles
if you have a bottle of sulfur hexafluoride 20.00 L and a density of 6.17 g/L
Answer:
Explanation:
Ρ=6.17g/L
m=20*6.17
m=123.4g
n=m/M
n=123.4 mol/138
n= 0.89mol
what is a type of atom that can be bonded with water and hydrogen
Answer: Oxygen (??)
Explanation: Im not sure but smth like H2O (my brain is not braining T-T)
The ΔHvap of a certain compound is 32.77 kJ·mol−1 and its ΔSvap is 94.72 J·mol−1·K−1. What is the boiling point of this compound?
The compound's boiling point is around 73.65 °C.
Which spontaneous responses are positive?Unexpected Responses. Favorable reactions are those that cause the system's enthalpy to drop while its entropy rises. The reaction happens naturally when both of these conditions are true. Both endothermic and exothermic reactions, which absorb heat and release it, can occur spontaneously.
We can use the Gibbs-Helmholtz equation to solve for the boiling point:
ΔG = ΔH - TΔS
At boiling point, ΔG = 0, so we can solve for T:
T = ΔH/ΔS
Substituting the given values:
T = (32.77 kJ·mol−1) / (94.72 J·mol−1·K−1)
T = 346.8 K
Converting to Celsius:
Boiling point = 346.8 K - 273.15 = 73.65 °C
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How can you evaluate how well a transportation system meets the needs of a community?
four score and seven years ago (our father) brought this continent, a new nation,
answer our fathersA 2.6 mol sample of N2 is held in a 4191 mL balloon at 89.9 atm. What temperature (in Celcius) is the gas at? Answer to one decimal place.
Answer: the temperature of the gas is approximately 16.1°C.
Explanation: PV=nRT Rearranging the equation gives us T = PV/(nR), with all variables defined as before. Convert mL to L: V = 4191 mL = 4.191 L. Use equation: T = (89.9 atm) x (4.191 L) / (2.6 mol x 0.08206 L atm/(mol K)). Simplify to get T = 289.2 K. Convert Kelvin to Celsius: T = 289.2 K - 273.15 = 16.1°C.
The speed of sound in diamond, 12,000 meters/sec, is roughly four times the
speed in air. What is the speed of sound in diamond in feet per hour (ft/hr)?
Answer:
The speed of sound in diamond is about **12,000 metres per second (39,000 ft/s)** which is about **35 times** its speed in air³. To convert this to feet per hour (ft/hr), we can use the following conversion factors:
1 meter = 3.28084 feet
1 second = 3600 hours
Therefore, the speed of sound in diamond in feet per hour (ft/hr) is:
12,000 m/s x 3.28084 ft/m x 3600 s/hr = 141,732,480 ft/hr
If you started with 20.0 g of a radioisotope and waited for 3 half-lives to pass, then how much would remain? 2.50 g 5.00 g 10.0 g 15.0 g
The amount that would remain, given that 3 half-lives has pass when you started with 20.0 g is 2.50 grams (1st option)
How do i determine the amount that would remain?The following data were obtained from the question:
Original amount of radioisotope (N₀) = 20.0 gramsNumber of half-lives that has passed (n) = 3Amount remaining after 3 half-lives (N) = ?The amount remaining can be obtained as shown below:
N = N₀ / 2ⁿ
N = 20 / 2³
N = 20 / 8
N = 2.50 grams
Thus, we can conclude from the above calculation that the amount that would remain after 3 half-lives to pass is 2.50 grams (1st option)
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Answer:
2.50g
Explanation:
How many moles is 3.4 g of HCI?
3.4 g of HCl is therefore equivalent to roughly 0.0932 moles of HCl.
What is the HCI's mole count?Since each molecule of HCl contains one mole of hydrogen and one mole of chlorine, the mole quantity of HCl equals the mole quantity of hydrogen and chlorine in the sample.
Approximately 36.46 g/mol is the molar mass of hydrochloric acid (HCl). We must divide the mass by the molar mass to determine the number of moles of HCl in 3.4 g of HCl:
Mass of HCl / molar mass of HCl equals moles of HCl.
3.4 grams per 36.46 grams per mole of HCl
A mole of HCl is equal to 0.0932 mol.
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Perform the following calculations in indicate whether the solution will be acidic basic or neutral
Due to the nature of the reactants and the balanced chemical equations, the calculated solutions will be acidic, neutral, and neutral, respectively.
How can you tell whether a pH is neutral, acidic, or basic?Neutrality is represented by 7 on the scale, which ranges from 0 to 14. pH levels below 7 signify acidity, whereas pH values over 7 suggest baseness. The pH scale is really used to determine how much free hydrogen and hydroxyl ions are present in water.
When an acid is put to a neutral solution, what happens?This process of neutralising acid is known as. A basic solution goes away from being basic and towards the middle of the pH scale when an acid is introduced. It is known as neutralising.
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Where would a 5-kg object experience that greatest gravitational force?
A. on the moon
B. at the bottom of the ocean
C. at the top of a tall mountain
D. at sea level
A 5-kg object experiences the greatest gravitational force at sea level. The correct option is D.
What exactly is a scientific force?The term force has a particular definition in science. At this standard, it is perfectly acceptable to refer to a force as both a push and maybe a pull. A force is not one that an object possesses or possesses. Another object applies a force to another. The concept of a force is not restricted to living or non-living things.
What exactly is balanced force?
Balance occurs when the forces applied have similar strengths & act in opposite directions. These forces cancel each other out, and the movements of the object on which they act remain unchanged. The correct option is D.
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Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free energy of the following chemical reaction 2NH3 =N2H4 +H2
The reaction [tex]2NH_3=N_2H_4+H_2[/tex] has a standard reaction free energy of -62.4 kJ/mol.
What is energy?Energy is the capacity to carry out tasks or affect change. It comes in a variety of shapes and sizes, including kinetic energy (energy of motion), potential energy (stored energy of position), thermal energy (heat), electrical, chemical, and nuclear energy. Energy is required for the survival and growth of all living things. Additionally, it is necessary for the operation of industries and equipment.
Equation can be used to get a reaction's standard reaction free energy.
ΔG°rxn = ΣΔG°f (products) - ΣΔG°f (reactants).
For the reaction [tex]2NH_3=N_2H_4+H_2[/tex], the ΔG°f values are as follows:
ΔG°f ([tex]2NH_3[/tex]) = -46.2 kJ/mol
ΔG°f ([tex]N_2H_4[/tex]) = -20.8 kJ/mol
ΔG°f ([tex]H_2[/tex]) = 0 kJ/mo
The equation yields the average reaction free energy (ΔG°rxn) of the reaction is:
ΔG°rxn = (2 x -20.8) - (-46.2)
= -62.4 kJ/mol
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help pls!!! how many moles of H3PO4 form from 8.0 moles of H2O?
The number of mole of H₃PO₄ that can be formed from the reaction of 2 moles of P₄O₁₀ and 8 moles of H₂O is 5.33 moles
How do i determine the mole of H₃PO₄ formed?First, we shall determine the limiting reactant. Details below
P₄O₁₀ + 6H₂O -> 4H₃PO₄
From the balanced equation above,
1 mole of P₄O₁₀ reacted with 6 moles of H₂O
Therefore,
2 moles of P₄O₁₀ will react with = 2 × 6 = 12 moles of H₂O
From the above calculation, we can see that a higher amount of H₂O is needed to react completely with 2 moles of P₄O₁₀
Thus, H₂O is the limiting reactant.
Now, we shall determine the mole of H₃PO₄ formed from the reaction. Details below:
P₄O₁₀ + 6H₂O -> 4H₃PO₄
From the balanced equation above,
6 moles of H₂O reacted with 4 moles of H₃PO₄
Therefore,
8 moles of H₂O will react with = (8 × 4) / 6 = 5.33 moles of H₃PO₄
Thus, the mole of H₃PO₄ formed is 5.33 moles
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Que símbolo tiene 25 protones,25 electrones y 27 neutrones
A flask filled to the 25.0 ml mark contain 29.97 g of a concentrated salt water solution. What is the density of the solution?
A concentrated saltwater solution weighing 29.97 g and fitting into a flask to the mark of 25.0 ml has a density of about 1199.2 g/L.
How is the density of the solution determined?By dividing the solution's mass by its volume, we may get its density: density = mass/volume
We need to know the density of water at the solution's temperature as well as the capacity of the flask up to the 25.0 ml level in order to calculate the volume of the solution.
Since 1 mL = 0.001 L, volume is equal to 25.0 mL, or 0.0250 L.
Now, we may determine the solution's density as follows:
1199.2 g/L or 29.97 g/0.0250 L is what is referred to as density.
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