What is the answer to 2 x 8

A 7.337 gram sample of chromium is heated in the presence of excess oxygen. A metal oxide is formed with a mass of 9.595 g. Determine the empirical formula of the metal oxide.

What is the specific heat of a 42.6 gram compound that changes from 12 Celsius to 46 Celsius when it absorbs 1260 KJ of energy

There are three major isotopes of silicon: silicon-28, silicon-29, and silicon-30. Given the average atomic mass of silicon is 28.10 amu, estimate the percent abundance of the most abundant isotope of silicon.

Fe2o3 (s) + 3 co (g) → 2 fe (s) + 3 co2 (g) type of reaction

What are compounds? 1) Pure substance 2) homogeneous mixtures 3) heterogeneous mixtures

A gas has a volume of 5.0 L at a pressure of 50 KPa. What happens to the volume when the pressure is increased to 125?

What is the molar mass of Fe2Br3? 1.35 x 10^2 g/mole 3.27 x 10^2 g/mole 3.51 x 10^2 g/mole 8.14 x 10^2 g/mole

A gas with a volume of 5.0 L at a pressure of 215 kPa is allowed to expand to a volume of 14.0 L. What is the pressure in the container if the temperature remains constant?

Sunita carries out an experiment to investigate diffusion. She uses water and a food dye to find out how the volume of water used affects the time the dye takes to spread evenly through the water.

How are coefficients used to balance chemical equations?