General Chemistry Answers

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The titration of a 10.0ml sample of vinegar requires 30.0ml of 0.20 M NaOH solution. Calculate

i. The molarity

ii. The mass /mass percent concentration of acetic acid.

Given that the density of acetic acid is 1.01g/cm3

1. Find the pH of the following solutions. Make sure you express your answer in the correct

number of significant digits. (12 marks)

a) 0.0010 M HClO₄ …..__________ b) 2.35 x 10^-3 M KOH …___________

c) 4.678 x 10^-5 M HNO₃..____­_____ d) 12.0 M HCl ...............…__________

e) 0.20 M Ba(OH)₂ .....___________ f) 4.30 M H₃O⁺ ...........…...__________

2. Find the [H₃O⁺] in 0.00256 M HBr. (1 mark)

Answer ________________

3. Find the [H₃O⁺] in 0.80 M LiOH. (2 marks)

Answer ________________

4. Find the [H₃O⁺] in a solution with a pH = 3.216 (1 mark)

Answer ________________

5. Find the [H₃O⁺] in 0.45 M BaO (2 marks)

Answer ________________

6. Find the [OH^-] in 0.150 M HClO₄ (2 marks)

20

Answer ________________

A sample of O2(g) which is saturated with water vapor, is kept in a 15.0-L vessel at 33°C and has a pressure of 750 torr. if the pressure of the water vapor at this temperature is 30.0 Torr, what would be the pressure of the dry oxygen?

in a gas mixture composed of N2, Ne, and He, the partial pressure of N2 is 0.60 atm, Ne is 1.5 atm, and He is 0.90 atm. What is the total pressure of the mixture?.Calculate the mole fraction of each gas

Calculate the percentage of Oxygen in Vitamin C

how much heat energy is used to vaporize 3.5 mol of chloroethane at its normal boiling point 12.3°c given Hvap= 24.7k/mol

1. Answer the problem using the step by step process.

2. Write the 3 digits after the decimal point. ( NO ROUND OFF )

3. Box your answer.

Given:

1 = 2.5 ohms

2 = 3 ohms

3 = 1.7 ohms

4 = 3.7 ohms

5 = 9 ohms

6 = 4.5 ohms

7 = 5 ohms

8 = 7.8 ohms

9 = 13 ohms

Voltage total = 100 volts

Solve for:

Resistance total

Current total

Voltage from 1 to 9

Current from 1 to 9

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how many grams of water can be heated from 20.0 c to 50.0 c using 12500.0 joules

How much heat is absorbed by 20 g granite boulder as energy from the sun causes its temperature to change from 10°C to 29°C? (Specific heat capacity of granite is 0.1cal/goC) 38 cal