An element is a substance that cannot be broken down chemically into

A. electrons.

B. another substance.

C. atoms.

D. protons

Which of the following processes rearranges atoms during a reaction? O burning O cooling O crushing O evaporating

An empty 4.00 l bottle has mass of 876 g. when filled with nitric acid, the total mass is 6914 g. what is the density of nitric acid in g/cm3?

Mercury is often used as an expansion medium in a thermometer. The mercury sits in a bulb on the bottom of the thermometer and rises up a thin capillary as the temperature rises. Suppose a mercury thermometer contains 3.

Which of the following are correct statements about reactions? Check all that apply. A. If a reaction happens, it will be very fast. B. During a reaction, a catalyst is always used up along with the reactants. C.

For scuba dives below 150 ft, helium is often used to replace nitrogen in the scuba tank. If 15.2 g of He (g) and 30.6 g of O2 (g) are added to a previously evacuated 5.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda