Determine the empirical formula of an organic hydrocarbon compound that contains 80% by mass of carbon and 20% by mass of hydrogen. If the Mr of the compound is 30, what is the molecular formula?

Which of the following includes the correct pairing of volcano and its formation? Cinder volcano; large, explosive eruptions Cinder volcano; alternating quiet and explosive eruptions Shield volcano; large, quiet eruptions Composite volcano; large;

When metals react with nonmetals, an ionic compound generally results. what is the predicted general formula?

What are the three major fossil fuels?

Because hydroxide ions are alkaline, they influence the alkalinity of water Would this be true or false?

Convert. 347 kilometers to miles show your work

The density of water is 1.0 g/cm3 will rubbing alcohol float with a density of 0.81 g/cm3

Write an equation that shows the formation of the phosphide ion from a neutral phosphorus atom.

Which of the following terms is defined by the measure of mass per unit of volume? gravity density weight acceleration

Select the lon. O NO₂ H2SO4 O A3

True or False: A Solar eclipse occurs when Earth casts a shadow on the Moon.