Solids and Plasmas — Unit test Answers

The volume of a gas decreases to half of its original volume, but the gas maintains the same number of moles and temperature. According to the ideal gas law, what will most likely happen to the pressure?

Which quantity is held constant when working with Boyle’s, Charles’s, and Gay-Lussac’s laws?

What is the volume of 0.200 mol of an ideal gas at 200. kPa and 400. K?Use and .

The pictures below show samples of different substances.The mass and volume of each sample differ from the mass and volume of the other samples. Is it possible for each sample to contain 1 mol of each substance?

Which proportionality shows the result of combining Avogadro’s law with Boyle’s law?

Consider the substances below.• 1 mol of beryllium• 1 mol of salt• 1 mol of water• 1 mol of hydrogenWhich statement is true about these substances?

What is the relationship between a mole and Avogadro’s number?

The ideal gas constant, R has several different values that could be used. Which quantity causes these differences?

Which statement best explains the purpose of using a mole in the measurement of matter?

A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures that are exerted by nitrogen and hydrogen are 0.26 atm and 0.28 atm, respectively. If the total pressure is 0.90 atm, what is the partial pressure of ammonia?Use .

A tire at 21°C has a pressure of 0.82 atm. Its temperature decreases to –3.5°C. If there is no volume change in the tire, what is the pressure after the temperature change?Use .

Which law is described by saying that when the pressure of a gas in a sealed container is cut in half, the gas will double in volume at a steady temperature?