Other Chemistry Answers

During the course of an experiment, a student prepared a solution of sodium hydroxide by dissolving 3g of the salt in 100mL of water. Calculate the pH of the solution.

The container where the following reaction is occurring (at equilibrium) has its volume suddenly increased. Which way will the equilibrium shift to compensate this change?

N2 (g) + 3H2 (g) ⇌2NH3 (g) ∆H = -92 kJ/mol

Adults consume less than about 25g of sugar a day, What percentage of this mass of sugar is found in 15g of drink crystals

How many sodium ions are in 3.0 moles of NaCI?

a 17.92 g sample of copper was submerged in water, and the volume reading rose by 2.00 mL. what is the density of the copper sample?

The closed container holding the following reaction at equilibrium has its volume suddenly increased. Which way will the equilibrium shift to compensate this change?

If the reaction below produces 5,595.0 kJ of energy, how many grams of KCl will be produced? (KCl = 74.6 g/mol)

2 K (s) + Cl₂ (g) à 2 KCl (g)      ΔH_rxn =  –873.0 kJ  

If the reaction below produces 5,595.0 kJ of energy, how many grams of KCl will be produced? (KCl = 74.6 g/mol)

2 K (s) + Cl₂ (g) à 2 KCl (g)      ΔH_rxn =  –873.0 kJ  

Which of the following is the equation corresponding to the formation reaction for nitric acid in the gas phase? (ΔHrxn = ΔHproducts – ΔHreactants; ΔHrxn = Bond broken – Bonds made)

a) H (g) + N(g) + O₃ (g) → HNO₃ (g)

b) H₂ (g) + N₂(g) + 3 O₂ (g) → 2 HNO₃ (g)

c) H (g) + N(g) + 3 O (g) → HNO₃ (g)

d) 1/2 H₂ (g) + 1/2 N₂(g) + 3/2 O₂ (g) → HNO₃ (g)

e) H₂ + N₂ + O₂ → HNO₃