All the following are signs of a chemical reaction, except

A. a change in color or odor.

B. a release of gas.

C. a change of state.

D. a change in energy.

How doni balance a equation correctly?

A mixture of 0.600 mol bromine and 1.600 mol of iodine is placed into a rigid 1.000-L container at 350°C. Br2 (g) + I2 (g) 2 IBr (g). When the mixture has come to equilibrium, the concentration of iodine monobromide is 1.190 M.

If a simple gas is collected over water. The atmospheric pressure is 778 mm and the temperature is 30°C. If the vapor pressure of water at 30 C is 31.8 mm, what is the pressure of the gas?

How many covalent bonds are there in one molecule of silica, SiO2?

Why is aluminium in group 3 of the periodic table?

Which should be more viscous, polar or non polar

The function of a specific enzyme is most directly influenced by its

Explain why the atomic mass of an element is usually not given as a whole number even though each individual atom of the element has a whole number of protons and neutrons

A canister of acetylene has a volume of 42 L. The temperature of the acetylene is 305 K and the pressure is 780 torr. Determine the amount of gas in the canister

In terms of the scientific method, the purpose of an experiment is: form a hypothesis test a hypothesis form a conclusion develop data