4. Write a chemical formula for a compound that has two atoms of oxygen (0) and

three atoms of iron (Fe).

Do scientists worldwide use the same units of measurements?

A 32.5 gram rock has a volume of 8.85cm cubed. What is the density of the rock?

This form of matter does not have definite shape and is not easily compressed. solids liquids gases plasmas

What causes lightning? a) thunder b) an electric discharge c) rising warm air d) air masses meeting

How many grams of the excess reactant remain after the limiting reactant is completely consumed? express your answer using two significant figures?

The chemical equation below shows the combustion of methane (CH4). CH4+2O2--CO2+2H2O The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will firm when 8.

Describe the function and usefulness of a model in scientific investigations, using the atomic model as an example.

Which set expresses the following numbers in scientific notation?: seven hundred-millionths, seven hundred million, and seven ten-thousandths.

What is the relationship among voltage, current, and resistance?

Why are covalent bonds important in living things?