Chemistry Day 2&3

Front

What is a compound in chemistry?

Back

A compound is a substance formed when two or more chemical elements are chemically bonded together.

Front

Which of the following is NOT a compound: Cl2, H2O, NaCl?

Back

Cl2 is not a compound; it is a diatomic molecule.

Front

How do you determine the number of atoms of each element in a chemical formula?

Back

Count the subscripts in the formula; if there is no subscript, it is assumed to be 1.

Front

What is the molecular formula for C3H5(NO3)3?

Back

C = 3, H = 5, N = 3, O = 9.

Front

How many oxygen atoms are in the compound C3H5(NO3)3?

Back

There are 9 oxygen atoms in the compound.

Front

What is a coefficient in a chemical equation?

Back

A coefficient is a number placed in front of a chemical formula to indicate how many molecules or moles of that substance are present.

Front

What is the coefficient in the equation 4CF2Cl2?

Back

The coefficient is 4.

Front

How many carbon atoms are in the compound 4CF2Cl2?

Back

There are 4 carbon atoms in the compound.

Front

How many fluorine atoms are in the compound 4CF2Cl2?

Back

There are 8 fluorine atoms in the compound.

Front

How many chlorine atoms are in the compound 4CF2Cl2?

Back

There are 8 chlorine atoms in the compound.