Questions from General Chemistry

Q: Calcium oxide can be used to “scrub” carbon dioxide from

Calcium oxide can be used to “scrub” carbon dioxide from air. CaO(s) + CO2(g) CaCO3(s) What mass of CO2 could be absorbed by 1.25 g of CaO? What volume would this CO2 occupy at S...

Q: Which substance in each pair would be expected to be more volatile

Which substance in each pair would be expected to be more volatile at a particular temperature? Explain your reasoning. a. H2O(l) or H2S(l) b. H2O(l) or CH3OH(l) c. CH3OH(l) or CH3CH2OH(l)

Q: Consider the following reaction for the combustion of octane, C8H18:

Consider the following reaction for the combustion of octane, C8H18: 2C8H18(l) + 25O2(g) / 16CO2(g) + 18H20(l) What volume of oxygen gas at STP would be needed for the complete combustion of 10.0 g o...

Q: For each of the following molecules, predict both the molecular structure

For each of the following molecules, predict both the molecular structure and bond angles around the central atom. a. SeS2 b. SeS3 c. SO2 d. CS2

Q: Ammonia and gaseous hydrogen chloride combine to form ammonium chloride.

Ammonia and gaseous hydrogen chloride combine to form ammonium chloride. NH3(g) + HCl(g) NH4Cl(s) If 4.21 L of NH3(g) at 27 °C and 1.02 atm is combined with 5.35 L of HCl(g) at 26 °C...

Q: Explain the difference between intramolecular and intermolecular forces.

Explain the difference between intramolecular and intermolecular forces.

Q: Calcium carbide, CaC2, reacts with water to produce acetylene gas

Calcium carbide, CaC2, reacts with water to produce acetylene gas, C2H2. CaC2(s) + 2H2O(l) C2H2(g) + Ca(OH)2(s) What volume of acetylene at 25 °C and 1.01 atm is generated by th...

Q: Although we generally think of combustion reactions as involving oxygen gas,

Although we generally think of combustion reactions as involving oxygen gas, other rapid oxidation reactions are also referred to as combustions. For example, if magnesium metal is placed into chlorin...

Q: If water is added to magnesium nitride, ammonia gas is produced

If water is added to magnesium nitride, ammonia gas is produced when the mixture is heated. Mg3N2(s) + 3H2O(l) 3MgO(s) + 2NH3(g) If 10.3 g of magnesium nitride is trea...

Q: Two molecules that contain the same number of each kind of atom

Two molecules that contain the same number of each kind of atom but that have different molecular structures are said to be isomers of each other. For example, both ethyl alcohol and dimethyl ether (s...