Calculate ΔH for the first reaction using the thermochemical information from the other three reactions.
ZnO + CO 2 → ZnCO 3 ΔH = ?
H 2CO 3 → H 2O + CO 2 ΔH = 62 kJ
Zn(OH) 2 → ZnO + H 2O ΔH = 72 kJ
Zn(OH) 2 + H 2CO 3 → 2H 2O + ZnCO 3 ΔH = 117 kJ
Balance the following redox reaction that occurs in acidic solution. Cr
2O 7 2- (aq) + Cl -(aq) → Cr 3+(aq) + Cl 2(g)
What volume of 0.200 M K 2Cr 2O 7 solution must be added to completely reduce 2.000 grams of KCl?
Draw a Lewis structure for acetic acid, which is variously written as HC 2H 3O 2, CH 3CO 2H, or CH 3COOH. Circle the acidic hydrogen.
Write and balance net ionic equations for each of the following reactions:
Aqueous solutions of sodium phosphate and copper(II) nitrate are mixed
Solid potassium oxide is added to pure water
An aqueous solution of potassium bicarbonate is added to a dilute aqueous solution of sulfuric acid
Write balanced compound formulas for each of the following:
Calculate the pH of a 0.500 M solution of acetic acid ( K = 1.8 x 10 a -5).
Solid potassium chlorate is heated. Write the balanced equation.
Explain why the molten product causes the rapid combustion of a gummy bear
An 18.83 gram sample of a gas occupies 4.00 L at a pressure of 3.00 atm and 22.0°C.
What is the molar mass of the gas
The gas is a diatomic molecule of an element. Which element is it?
40.0 grams of zinc is placed in 400.0 mL of 3.00 M hydrochloric acid. The hydrogen gas is collected at 25.0°C by displacement of water. What volume of dry hydrogen gas is collected at 1.00 atmospheres pressure?
Calculate the theoretical yield of lead(II) chromate precipitated when 42.050 g of lead(II) nitrate is added to 855 mL of 0.750 M aqueous potassium chromate solution.