General Chemistry Answers

What is the % by volume (v/v) of solution if 7.5 L HCl is added to 1900 mL of water?

rs from diamond c. Graphite was heated in excess air and the gas given off passed through aqueous calcium hydroxide for a long time i.

You have a sample of gas in a flask with a volume of 250 mL. At 25.5 °C, the pressure

of the gas is 360 mm Hg. If you decrease the temperature to −5.0 °C, what is the gas

pressure at the lower temperature?

1.00 mL of 12.0 M HCl is added to 1.00 L of a buffer that contains  0.110 M HNO₂ and 0.150 M NaNO₂. How many moles of HNO₂ and NaNO₂remain in solution after addition of the HCl?

You have a sample of CO2 in flask A with a volume of 25.0 mL. At 20.5 °C, the

pressure of the gas is 436.5 mm Hg. To find the volume of another flask, B, you move the

CO2 to that flask and find that its pressure is now 94.3 mm Hg at 24.5 °C. What is the

volume of flask B?