Chemistry Semester Exam Review

Element A and element B chemically combine to form substance C. Substance C must be?

The formula H2 represents one

Which statement describes a characteristic of all compounds?

A substance that is composed only of atoms having the same atomic number is classified as

The formula Al2S3 represents?

Which species represents a chemical compound?

Given the unbalanced equation:

Al2(SO4)3 + Ca(OH)2 --> Al(OH)3 + CaSO4

What is the coefficient in front of the CaSO4 when the equation is completely balanced with the smallest whole - number coefficients?

Given the unbalanced equation:

C3H8(g) + O2(g) --> H2O(g) + CO2(g)

Given the unbalanced equation:

A1 + O2 --> Al2O3

When this equation is completely balanced using smallest whole numbers, what is the sum of the coefficients?

Given the unbalanced equation:

N2(g) + O2(g) --> Na2O5(g)

When the equation is balanced using smallest whole numbers, the coefficient of N2(g) will be?