OCHEMISTRY B SY 21-22 SEM 2
SEMESTER TEST UPDATE QUESTIONS
AND CORRECT ANSWERS 100% PASS
GUARANTEED
A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K.
Assuming constant pressure, what should the new volume of the balloon be? - 616 cm3
Which statement is true about a carbonated soft drink? - The water is the solvent, and the carbon
dioxide is the solute.
For the reaction CH3COOH → CH3COO- + H+, which statement is true? - CH3COO- is a conjugate base.
Which example is a weak base? - ammonia
How many moles of a gas sample are in a 20.0 L container at 373 K and 203 kPa?
The gas constant is 8.31 L−kPa/mol−K. - 1.30 moles
You dissolve 0.74 g of potassium chloride (KCl) in 500 mL of water.
What is the molarity of the solution?
Use a periodic table. - 0.02 M
How much heat do you need to raise the temperature of 300 g of ethanol from 0°C to 20°C? - 14.6 kJ
If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have
after 42 days? - 1.25 g
SEMESTER TEST UPDATE QUESTIONS
AND CORRECT ANSWERS 100% PASS
GUARANTEED
A student increases the temperature of a 556 cm3 balloon from 278 K to 308 K.
Assuming constant pressure, what should the new volume of the balloon be? - 616 cm3
Which statement is true about a carbonated soft drink? - The water is the solvent, and the carbon
dioxide is the solute.
For the reaction CH3COOH → CH3COO- + H+, which statement is true? - CH3COO- is a conjugate base.
Which example is a weak base? - ammonia
How many moles of a gas sample are in a 20.0 L container at 373 K and 203 kPa?
The gas constant is 8.31 L−kPa/mol−K. - 1.30 moles
You dissolve 0.74 g of potassium chloride (KCl) in 500 mL of water.
What is the molarity of the solution?
Use a periodic table. - 0.02 M
How much heat do you need to raise the temperature of 300 g of ethanol from 0°C to 20°C? - 14.6 kJ
If you have 10 grams of a substance that decays with a half-life of 14 days, then how much will you have
after 42 days? - 1.25 g
