**Question**: What is the molecular formula of a monohalogen derivative of methane?**Answer**: The monohalogen derivative of methane (CH₄) would have the formula CH₃X, where X is the halogen.**Question**: How many moles of hydrogen are present in 2 moles of propane (C₃H₈)?**Answer**: There are 16 moles of hydrogen in 2 moles of propane.**Question**: How many moles of chlorine are needed to completely react with 1 mole of methane to form carbon tetrachloride (CCl₄)?**Answer**: 4 moles of chlorine are needed to react with 1 mole of methane to form carbon tetrachloride.**Question**: What is the molecular weight of butane (C₄H₁₀)?**Answer**: The molecular weight of butane is 58.12 g/mol.**Question**: How many grams of ethane (C₂H₆) are there in 1 mole?**Answer**: There are 30.07 g of ethane in 1 mole.**Question**: How many liters of chlorine gas are needed to react completely with 22.4 liters of methane gas at STP to form carbon tetrachloride and hydrogen chloride?**Answer**: 89.6 liters of chlorine gas are needed.**Question**: What is the percentage of carbon by mass in ethane (C₂H₆)?**Answer**: The percentage of carbon by mass in ethane is about 79.9%.**Question**: How many moles of hydrogen chloride are produced when 1 mole of propane reacts with chlorine to produce monochloropropane and hydrogen chloride?**Answer**: 1 mole of hydrogen chloride is produced.**Question**: What is the molecular weight of 2-chloropropane (C₃H₇Cl)?**Answer**: The molecular weight of 2-chloropropane is 78.54 g/mol.**Question**: How many moles of ethane (C₂H₆) can be obtained from 5 moles of hydrogen reacting with excess ethene (C₂H₄)?**Answer**: 2.5 moles of ethane can be obtained.**Question**: What is the percentage composition by mass of hydrogen in propane (C₃H₈)?**Answer**: The percentage composition by mass of hydrogen in propane is about 17.65%.**Question**: What is the percentage of carbon by mass in chloroform (CHCl₃)?**Answer**: The percentage of carbon by mass in chloroform is about 10.13%.**Question**: How many moles of methane (CH₄) are needed to produce 5 moles of water in a complete combustion reaction?**Answer**: 2.5 moles of methane are needed.**Question**: How many grams of butane (C₄H₁₀) are there in 2 moles?**Answer**: There are 116.24 g of butane in 2 moles.**Question**: What is the molecular weight of the monobromine derivative of ethane (C₂H₅Br)?**Answer**: The molecular weight of monobromine derivative of ethane is 108.97 g/mol.**Question**: How many liters of oxygen gas are needed to burn 2.24 liters of methane gas completely at STP?**Answer**: 6.72 liters of oxygen gas are needed.**Question**: What is the molecular weight of chlorobenzene (C₆H₅Cl)?**Answer**: The molecular weight of chlorobenzene is 112.56 g/mol.**Question**: How many moles of hydrogen gas are produced when 2 moles of 2-chloropropane react with excess zinc to produce propane and zinc chloride?**Answer**: 2 moles of hydrogen gas are produced.**Question**: How many grams of methane (CH₄) are there in 5 moles?**Answer**: There are 80.05 g of methane in 5 moles.**Question**: What is the percentage composition by mass of chlorine in chloroform (CHCl₃)?**Answer**: The percentage composition by mass of chlorine in chloroform is about 89.51%.