PLEASE HELP ASAP!! Choose the reaction that would not lead to the production of hydrogen gas. a. Cu + HCl
b. Na + H2SO4
c. K + H2O
d. Zn + HCl

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

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

Which of the following volumes is the smallest? a) one microliter b)one deciliter d)one liter c)one milliliter