A 1.0 g sample of hydrogen reacts completely with 19.0 g of fluorine to form a compound of

hydrogen and fluorine. What is the percent composition by mass of hydrogen in this

compound?

What is the main link between water in the oceans and on land

Which of these are examples of physical changes? Check all that apply. burning wood freezing water cutting paper iron rusting mixing water and acetone

Carbon dioxide is a green house gas that is linked to global warming. It is released into the atmosphere through the combustion of octane (C8H18) in gasoline. Write the balanced chemical equation for the combustion of octane.

Ciliates often have two kinds of nuclei that have different functions. Ciliates often have two kinds of nuclei that have different functions. True False

In order for them to work, what must the control rods in a nuclear reactor contain? A. neutron-emitting material B. neutron-absorbing material C. uranium-235 D. water

Which substance is a diatomic molecule? a. he b. o2 c. co2 d. h2o?

What is the difference between the electronegativity values of sodium and bromine?

Which of the following elements is the most stable element? argon, manganese, phosphorus, robidium

List results of Chemical Reactions.

When you measure something in meters cubed, you are measuring