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

• a solution

• a compound

• an element

• a mixture

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The formula H2 represents one

• gram

• liter

• atom

• molecule

Tags

NGSS.MS-PS1-1

Which statement describes a characteristic of all compounds?

• compounds contain one element, only

• compounds contain two elements, only

• compounds can be decomposed by chemical means

• compounds can be decomposed by physical means

Tags

NGSS.MS-PS1-1

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

• a compound

• a element

• a homogeneous mixture

• a heterogeneous mixture

The formula Al2S3 represents?

• an element

• a binary compound

• a ternary compound

• a mixture

Tags

NGSS.MS-PS1-1

Which species represents a chemical compound?

• N2

• NH4+

• Na

• NaHCO3

Tags

NGSS.MS-PS1-1

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?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-5

Given the unbalanced equation:

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

• 5

• 2

• 3

• 10

Tags

NGSS.MS-PS1-5

Given the unbalanced equation:

A1 + O2 --> Al2O3

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

• 9

• 7

• 5

• 4

Tags

NGSS.MS-PS1-5

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?

• 1

• 2

• 5

• 4

Tags

NGSS.MS-PS1-5