Consider the following list of substances:

Question

carbon dioxide, CO2

hydrogen gas, H2

magnesium, Mg

sodium chloride, NaCl

methane, CH4

potassium, K

Which of the substances are compounds?

(1 point)
Responses

only CO2
and CH4
only cap c cap o sub 2 and cap c cap h sub 4

only CO2
, NaCl
, and CH4
only cap c cap o sub 2 , cap n A cap c l , and cap c cap h sub 4

only CO2
, H2
, NaCl
, and CH4
only cap c cap o sub 2 , cap h sub 2 , cap n A cap c l , and cap c cap h sub 4

only CO2
, Mg
, NaCl
, CH4
, and K

Answer 1

To identify which substances are compounds from the given list, we should remember that a compound consists of two or more elements that are chemically bonded together. Here are the substances listed:

1. Carbon dioxide (CO2) - compound
2. Hydrogen gas (H2) - element
3. Magnesium (Mg) - element
4. Sodium chloride (NaCl) - compound
5. Methane (CH4) - compound
6. Potassium (K) - element

Based on this analysis, the compounds from the list are CO2, NaCl, and CH4.

Therefore, the correct response is: only CO2, NaCl, and CH4.