General Chemistry Answers

Write the thermochemical equation for the following reactions that occur at constant pressure:

a.Decomposition of mercuric oxide, HgO, to mercury and oxygen gas, requires 87.1 kJ of heat

b.Combustion of hexane, C₆H₁₂, to carbon dioxide gas and water releases 3923.9 kJ of heat

Find the formula charge of each atom in the given compounds/polyatomic

ion.

1. HBr

2. N 2 O

3. SO 4 2-

A ballon has a volume of 75.0-L when it is released at a pressure of 130kpa. What will the balloons volume be when it reaches an altitude with a pressure of 100kpa

In the periodic table the size of atoms decrease from left to right because

A car of mass 1250 kg drives around a curve with a speed of 22 m/s.

a. If the radius of the curve is 35 m, what is the centripetal acceleration of the car? (3 points)

b. The maximum friction that the car's tires can apply is 20,000 N. What is the radius of the smallest circle the car can drive in at a speed of 22 m/s? (3 points)

If I add 65 grams of calcium chloride to 500 grams of water, what will the boiling

points be of the resulting solution? Kb = 0.512 °C.

A 0.25 moles neon is at 256 mmHg and at temperature of 35°C. What is the volume? (1 atm = 760 mmHg)

𝟐𝑺𝑶𝟐(𝒈) + 𝑶𝟐(𝒈) ⇌ 𝟐𝑺𝑶𝟑(𝒈)

Kc = 6.1 x 104 at 750K. At equilibrium 𝑷𝑺𝑶𝟐 = 𝟏.𝟐𝟐 𝒃𝒂𝒓 and 𝑷𝑶𝟐 = 𝟐.𝟑𝟑 𝒃𝒂𝒓.

Calculate 𝑃 at 750 K (3 points). Hint be sure to convert Kc to Kp first. 𝑆𝑂3

Calculate Kc at 550 K if Δ𝑟𝐻𝑜 = −197.8 𝑘𝐽 𝑚𝑜𝑙−1 (2 points).

Does the decrease in temperature favour products or reactants at equilibrium (1 point)?

what is the molarity for a solution with 25 g mgch in 350 ml water

A=[0.30],[0.60],[0.30] (mol/l)

B=[0.15],[0.30].[0.30] (mol/l)

C= 7.0 x 10^-4,2.8 x 10^-3,1.4 x 10^-3(mol/L-s)

What is the rate equation for the reaction?