The reaction for the combustion of methane can be expressed as follows.
CH4 + 2O2 --> CO2 + 2H2O
We solve first for the amount of carbon dioxide in moles by dividing the given volume by 22.4L which is the volume of 1 mole of gas at STP.
moles of CO2 = (5.6 L) / (22.4 L/1 mole)
moles of CO2 = 0.25 moles
Then, we can see that every mole of carbon dioxide will need 1 mole of methane
moles methane = (0.25 moles CO2) x (1 moles O2/1 mole CO2)
= 0.25 moles CH4
Then, multiply this by the molar mass of methane which is 16 g/mole. Thus, the answer is 4 grams methane.
The empirical formula of Lorelai's compound is C₄H₁₀O
<h3>Data obtained from the question</h3>
- C = 64.8 g
- H = 13.62 g
- O = 21.58 g
- Empirical formula =?
<h3>How to determine the empirical formula</h3>
Divide by their molar mass
C = 64.8 / 12 = 5.4
H = 13.62 / 1 = 13.62
O = 21.58 / 16 = 1.35
Divide by the smallest
C = 5.4 / 1.35 = 4
H = 13.62 / 1.35 = 10
O = 1.35 / 1.35 = 1
Thus, the empirical formula of the compound is C₄H₁₀O
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Answer:
D
Explanation:
mechanical weathering is the breaking down of a larger rock into smaller ones. A and B are chemical weathering and C is irrelevant.
Two or more elements make up a compound
Answer:
The transfer of energy between the two substances stops when the two substances are at equilibrium. If the two substances were exchanging heat energy, then the transfer of energy stops when both are at the same temperatures and the net flow of heat energy between the two become zero.
Explanation:
A system is said to be in equilibrium when the forward forces are equal to the reverse forces and the equilibrium quotient is the same as the equilibrium constant. No further work is being done. Also, the entropy is at its highest and Gibbs free energy at its lowest.
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