Answer:
101.59 g/mol
Explanation:
Unknown gas = X
Using grahms's law of effusion;
RateX / RateO2 = √ (Molar massO2 / Molar massX)
RateX= Volume / time = 1 / 57 = 0.01754
RateO2 = Volume / Time = 1 / 32 = 0.03125
Molar massO2 = 32
Inserting the values into the equation;
0.01754 / 0.03125 = √ (32 / Molar massX)
0.56128² = 32 / Molar massX
0.3150 * Molar massX = 32
Molar massX = 32 / 0.3150
Molar massX = 101.59 g/mol
Which combination of carboxylic acid and alcohol produces this ester?
What type of conversion is taking place when natural gas is used to heat water?
A. Chemical energy into thermal energy.
B. Thermal energy into mechanical energy.
C. Mechanical energy into electromagnetic energy.
D. Electromagnetic energy into chemical energy.
Answer:
A
Explanation:
I looked it up and this was the answer for your question
A full moon is observed every...
A. 2 weeks.
B. 24 hours.
C. 29.5 days.
D. 365 days
correct=brainliest
Answer:
C
Explanation:
1. Since minerals come from non-living things, they are
A. crystals
B. solids
C. coloured
D. inorganic substances
Answer:
D. inorganic substances
Explanation:
Inorganic lacks carbon, which is usually found in living things.
if you had to explain to a friend how to balance a chemical equation, what
would you say to them?
Answer:
make sure that the number of atoms on the left side of the equation equals the number of atoms on the right.
Explanation:
A chemical reaction can be balanced by multiplying each side with suitable integers such that the number of each element in the reaction must be equal number on both side.
What is a balanced chemical equation?According to the law of conservation of mass for a chemical reaction, the total mass in the reactant side is equal to the total mass in the product side. Thus, a balanced chemical equation represents the perfect stoichiometry for each reactants and products.
The number of each elements in both side have to be equal in number. If they are unequal on both side, we can balance the reaction by multiplying with suitable integers.
Lets have one example. Consider the given reaction.
[tex]\rm CH_{4} + O_{2} \rightarrow H_{2}O + CO_{2}[/tex]
Here, 4 H are in left side and only 2 in right side. Similarly number of oxygen also not balanced.
The balanced equation requires a coefficient of 2 for water and 2 for oxygen in reactant thus, it can be written as:
[tex]\rm CH_{4} + 2O_{2} \rightarrow 2H_{2}O + CO_{2}[/tex]
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The surface temperature of a white dwarf is higher than a red supergiant. True or False
Answer:
True.
Explanation:
Which mass is made up of 6.02x10^23 atoms? none of these 23 g sodium 42 g krypton 24 g carbon 78 g potassium
Answer:
23 g sodium
Explanation:
In chemistry, one mol (1mol) of a substance equals Avagadro's number or constant (6.02 × 10^23 atoms/particles/molecules).
According to this question in which the mass of different elements were given, the mass of the element that equals 6.02 × 10^23
Using the formula; mole = mass/molar mass
- Sodium = 23g/23g/mol = 1mol
- Krypton = 42g/84g/mol = 0.5mol
- Carbon = 24g/12g/mol = 2mol
- Pottasium = 78g/39g/mol = 2mol
Therefore, from the above illustration, it can be observed that only 23g of sodium contains 1 mol, hence, 23g sodium contains 6.02 × 10^23 atoms.
If you evaporated 722 mL of a 7.8 M solution of NaCl, what mass of NaCl would you recover?
Answer:
0.19g NaCl
Explanation:
Multiply the volume by the concentration to get the moles. Then, convert moles to grams which gives you that.
Iron (III) bromide reacts with sodium hydroxide to produce iron (III) hydroxide and sodium bromide. Write the balanced chemical equation in the box.
Can someone help me please
EASY SCIENCE QUESTION
Answer:
utcluclult
Explanation:
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Answer:
no WAYYYYYYY ITS SO EASY!!111!11
Explanation:
In the reaction 2 H2 + O2 + 2 H20 what is the coefficient of oxygen?
Calculate the specific heat of the substance if 733 J is required to raise the temperature of a 312 gram sample by 15 Celsius?
Answer: Formula: q = mcΔT,
- q is the amount of heat transferred
- m is the mass of the substance
- c is the specific heat capacity of the substance
- ΔT is the change in temperature
q= 733 J
m= 312g
ΔT = 15 °C
Calculate this together = 733 J / 312g x 15 °C
= and then you can find your answer for c.
Explanation:
Which of the following is a chemical property of water at 4°C?
its temperature
its color
its ability to decompose into hydrogen and oxygen
its state
Answer:
At 4°C what is not able to decompose into hydrogen and oxygen chemical changes cannot be reverted, in this case it can. It will not change color, because water is always clear, and won't at this state turn into ice. though it can be reverted.
Explanation:
I hope that is correct that's all I've learned so far!
Answer:
A) Its temperature
Explanation:
A balance and a graduated cylinder are used to determine the density of a mineral sample.
The sample was measured on the balance at 15.4 g.
The graduated cylinder began with 20 mL of water and measured 22.8 mL of water after the sample was placed into the graduated cylinder.
Density = mass / volume
What is the density of the mineral sample?
Which element in period 6 would have chemical properties similar to nitrogen? *
Answer:
Hydrogen
Lithium ,Beryllium,Nitrogen
Sodium.Magnesium,Phosphorus
Potassium,Calcium,Arsenic
Rubidium,Strontium,Antimony
The element in period 6 that would have chemical properties similar to nitrogen is bismuth.
The chemical properties of an element like oxidation states, reactivities, among others, are mainly related to its electronic configuration.
Elements located in the same group on the periodic table will have similar chemical properties since the electron configuration in their outer shell is the same.
The electronic configuration of nitrogen is the following:
1s² 2s² 2p³
Of all the elements of period 6, bismuth is the one that is located in the same nitrogen group (group 15), whose electronic configuration is:
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p³
The electron configuration of group 15 (ns² np³) is which gives them chemical properties like high reactivity at high temperatures, high reactivity with oxidant acids (except for nitrogen), low or almost no reactivity with water, etc.
Therefore, bismuth is the element in period 6 that would have chemical properties similar to nitrogen.
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If you can solve both
Will mark brainly
ASAP
Answer:
1. answer is subcutaneous tissue 2. answer is spleen
Explanation:
The subcutis is also known as the hypodermis or subcutaneous layer, and functions as both an insulator, conserving the body's heat, and as a shock-absorber, protecting the inner organs.
Excretory Organs. Organs of excretion include the skin, liver, large intestine, lungs, and kidneys. Together, these organs make up the excretory system.
Answer:
the answer is Subcutaneous Tissue
Explanation:
and the second one is Intestine
Which gas would have the fastest rate of diffusion, assuming all of the gases are at the same temperature?
-Ar
-Ne
-He
-Kr
Answer:
Its Neon
Explanation:
Why ? Because Neon is the fastest it can go to 435 m/s and thats one of the fastest element there.
Helium would have the fastest rate of diffusion. Therefore, option (C) is correct.
What is Graham's law?Graham’s law states that the rate of diffusion of a gas is inversely proportional to the square root of the molecular weight of that gas.
According to Graham’s Law, molecules of gas with lower molecular mass at constant pressure and temperature will diffuse faster than the higher molecular mass molecules. This formula is commonly utilized to compare the rates of diffusion of two different gases at the same pressures and temperatures.
[tex]\frac{Rate_1}{Rate_2} =\sqrt{\frac{M_2}{M_1} }[/tex]
Where M₁ is the molar mass of gas 1 while M₂ is the molar mass of gas 2.
The atomic mass of He, Ne, Ar, and Ke is 4, 20, 40, and 83 g/mol. The helium gas has the lowest atomic mass so it has the highest rate of diffusion while Krypton has the lowest rate of diffusion.
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This question is about iron three of the raw material added to a blast furnace used to extract iron from henatite are coke hematite and limestone name one other raw material added to the blast furnace
Answer: The fourth material that is added to the blast furnace is HOT AIR which provides OXYGEN for used for combustion of carbon (Coke).
Explanation:
Iron is the second most abundant metal found in the earth's crust after aluminium. It is not found in the free metallic state but are extracted from rocks which are rich in iron that contains other materials. These are known are iron ores and the most common iron ores are haematite ( Fe2O3).
Iron can be extracted from its ore with the used of blast furnace. The materials used for extraction of iron includes:
--> Coke
--> haematite( iron ore)
--> limestone and
--> Hot air.
The iron ore is first roasted in air so that iron(III)oxide is produced. The iron(III)oxide is then mixed with coke and limestone and heated to a very high temperature. Hot air is introduced into it from the bottom of the furnace. The coke is oxidizes the the oxygen in the hot air blast to liberate carbondioxide.
Balance each equation by entering the correct coefficients.
NH3 +
O2 →
NO +
H2O
Balanced equation:
4 NH3 + 5 O2 = 4 NO + 6 H2O
Will there ever be grams of a limiting reactant remaining after a reaction has stopped? Why or why not?
Assuming the reaction is complete, there should be no limiting reactant remaining after a reaction. This is because the limiting reactant, by definition, is "the reactant that is completely used up in a reaction."
I will seriously give all my points to someone who can help me with my science homework page; please. I'm so bad at science
How many moles of Fe2O3 can be made from 50 moles of Fe?
Answer:
25 mol.
Explanation:
The balanced chemical equation for the reaction depicted in this question is as follows:
4Fe + 3O2 → 2Fe2O3
Based on the above balanced equation, 4 moles of Fe produced 2 moles of Fe2O3.
Hence, 50 moles of Fe will produce as follows:
50 mol Fe × 2 mol Fe2O3/4 mol Fe
= 100/4
= 25 mol of Fe2O3
Which statement describes how snow is formed?
Answer:Snow in the atmosphere. Once snow crystals form in the atmosphere, they grow by absorbing surrounding water droplets. The snowflakes we end up seeing on the ground are an accumulation of these ice crystals.
Explanation:
Answer: Snow is defined as wet if there's a presence of water. within the context of snow formation, "dry" and "wet" don't seem to be used literally. Instead, they're wont to provide a distinction supported how each kind of snow is created and therefore the resulting property of either type. When the snowflakes are formed within the atmosphere, gravity takes over. Explanation: Because there were no statements I had to show the definition instead I hope this helped you to find your answer
Explain the role light plays on the rate
of photosynthesis.
Answer:
The process of photosynthesis occurs when green plants use the energy of light to convert carbon dioxide (CO2) and water (H2O) into carbohydrates. Light energy is absorbed by chlorophyll, a photosynthetic pigment of the plant, while air containing carbon dioxide and oxygen enters the plant through the leaf stomata.
What is the correct symbol equation for the reactions between propanoic acid + sodium carbonate?
Explanation:
[tex]2CH _{3}CH_{3}COOH + Na _{2}CO_{3} → 2CHCHCOONa + 2H ^{ + } + CO_{3} ^{ 2- } [/tex]
What is the mass of an element with 3 protons and 4 neutrons? Also, how many neutrons are in the nucleus of an atom that has an atomic mass of 36 and atomic number of 25?
How are the components of the electromagnetic spectrum, from radio waves to gamma rays, grouped?
Answer:
The sequence from longest wavelength (radio waves) to shortest wavelength (gamma rays) is also a sequence in energy from lowest energy to highest energy. Remember that waves transport energy from place to place. The energy carried by a radio wave is low, while the energy carried by a gamma ray is high.
Convert 300K to degrees Celsius.
What is radiation exactly
radiation is energy that comes from a source. (travels through the speed of light)