CIA #3 Review Units 7-9 Chemistry

How many moles of potassium oxide (K2O) will be formed when 1.52 moles of potassium reacts with oxygen according to the following reaction: 4 K + O2 → 2 K2O?

How many moles of copper are needed to react with sulfur to produce 120 grams of copper(I) sulfide according to the following reaction: 2 Cu + S → Cu2S?

What mass of iron is needed to react with sulfur in order to produce 96 grams of iron (III) sulfide according to the following equation? 2 Fe + 3 S → Fe2S3.

When all of the limiting reactant is used, the reaction _______.

14. How much heat is required to raise the temperature of a 825 g block of wood (specific heat = 1.8 J/g°C) from 22.0°C to 155.0°C?

Calculate the heat of formation for the following reaction: CH₄ + 3 Cl₂ → CHCl₃ + 3 HCl. Given the following information: CH₄ ΔH = -74.8 kJ, Cl₂ ΔH = -132.1 kJ, HCl ΔH = -76.0 kJ, CHCl₃ ΔH = -92.0 kJ.

How many electrons can each of the following sublevels hold: s, p?