Which of the following is true about mixtures and compounds?
A.
Mixtures and compounds are both made of two or more different substances.
B.
A compound forms when different substances chemically combine to form a new substance.
C.
A mixture contains different substances that are not chemically combined with one another.
D.
all of these

Under what conditions will a gas be most likely to exhibit the ideal gas properties predicted by the ideal gas law? 1)high pressures and high temperature, because particles are forced closer together with higher kinetic energy, so intermolecular forces of attraction are weaker 2)high pressure and low temperature, because particles are forced closer together and moving slower, so the volume of the particles is less significant 3) low pressure and high temperature, because particles are spread farther apart and moving faster, so the intermolecular forces of attraction are weaker 4)low pressure and low temperature, because particles are spread farther apart with lower kinetic energy, so the volume of the particles is less significant