Which technique or property would be used to separate aluminum cans from steel cans?
magnetism
boiling points
densities
filtration
What is the name of the compound represented by the chemical formula OF2?
Answer
oxygen difluoride
Which gas will diffuse at a faster rate, CH4 with a molar mass of 16 g or SO2 with a molar mass of 64 g?
answer
CH4
According to Avogadro’s principle, equal volumes of ideal gases at the same temperature and pressure contain equal numbers of
protons.
neutrons.
electrons.
particles.
This gas law describes the relationship between the pressure, volume, temperature, and number of moles of molecules of an ideal gas.
ideal gas law
combined gas law
Graham’s law of diffusion
Avogadro’s law
This gas law expresses the relationship between the pressure, volume, and temperature of a fixed amount of gas.
ideal gas law
combined gas law
Graham’s law of diffusion
Avogadro’s law
Deep-sea divers use a breathing mixture of helium, oxygen, and carbon dioxide. What is the partial pressure of oxygen if the total pressure of the mixture is 760 mm Hg, the pressure exerted by the helium is 609 mm Hg, and the pressure exerted by the carbon dioxide is 1 mm Hg?
760 mm Hg
500 mm Hg
150 mm Hg
609 mm Hg