Reference no: EM132423996

1. What type of reactions are each of the following?

1. 2 CH4 (g) + 2 O2 (g)==== CO2(g) + 2 H2O (l)

2. CaO (s) + CO2 (g) ==== CaCO3 (s)

3. 2 Mg (s) + O2(g) === 2 MgO (s)

4. PbCO3 (s) ==== PbO (s) + CO2 (g)

2. What volume (L) of 0.25) M HNO3 is required to neutralize a solution prepared by dissolving 17.5 g of NaOH in 350 mL of water?

3. A mixture of 0.600 mol of Bromine and 1.600 mol of iodine is placed into a rigid 1.000 L container at 250 °C. Br2 (g) + I2(g)==== 2 I Br(g)

When the mixture has come to equilibrium, the concentration of iodine monobromide is 0.800 M. What is the equilibrium constant for this reaction at 250 °C?

4. A helium tank can safely hold gas up to a pressure of 40.0 atm at all temperatures. When this tank contains 145 g of helium at 25.6°C, the gas exerts a pressure of 14.5 atm. What is the highest temperature to which this same quantity of helium can be safely heated in this tank?

5. For each of the following molecules is the indicated type of hybridization for the central atom?

BeCl2

SiH4

BF3

C2H2

H2O