What is the scaling factor if the molar mass of
1 answer:
Answer:
The scaling factor is 5.
Explanation:
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In this case, since the scaling factor is defined as the ratio of the molar mass of the molecular formula (complete) to the empirical formula (simplified), it is possible to compute it for the empirical formula of CH2O whose molar mass is 30 g/mol (12+2+16) as shown below:
Therefore, we can also infer that the molecular formula would be:
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<u>Answer:</u> The volume of hydrogen gas collected over water is 2.13 L
<u>Explanation:</u>
To calculate the number of moles, we use the equation:
Given mass of zinc = 5.566 g
Molar mass of zinc = 65.4 g/mol
Putting values in above equation, we get:
For the given chemical reaction:
As, HCl is present in excess. So, it is considered as an excess reagent.
Zinc is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
1 mole of zinc produces 1 mole of hydrogen gas.
So, 0.0851 moles of zinc will produce = of hydrogen gas
To calculate the volume of hydrogen gas, we use ideal gas equation, which is:
PV = nRT
where,
P = Pressure of hydrogen gas = Total atmospheric pressure - vapor pressure of water = (752 - 18.65) mmHg = 733.35 mmHg
V = Volume of the hydrogen gas
n = number of moles of gas = 0.0851 moles
R = Gas constant =
T = Temperature of hydrogen gas =
Putting values in above equation, we get:
Hence, the volume of hydrogen gas collected over water is 2.13 L