Question

Methane and propane are two compounds that are composed only of carbon and hydrogen atoms. The table below shows some of the properties of these two compounds.

Compound
Methane
Propane
CH4
СзНз
-161.6
-42.1
Formula
Boiling Point (°C)
Gas Density at 15°C (kg/m°)
0.68
1 9

Which of the following conclusions is best supported by the information in the table?
O A. When two elements combine, the mass of each element changes.
• B. When two compounds are mixed, the state of matter of the mixture changes.
C. Two elements can combine to produce different substances with different properties.

D. Two compounds can be mixed together to produce different materials with

Answer 1

different properties.

Answer 2

Which one bot? C or d

Answer 3

Both answer choices C and D could be supported by the information in the table. The table shows that methane (CH4) and propane (C3H8) are two different compounds with different properties, such as boiling point and gas density. This suggests that two elements (carbon and hydrogen) can combine to produce different substances (methane and propane) with different properties. This supports conclusion C. Additionally, the table does not provide any information about mixing compounds together, so there is no direct evidence to support conclusion D. Therefore, conclusion C is the best supported by the information in the table.