Question

1) Both carbon dioxide and water are pure substances. How are they similar to each other?

A. both substances have a set ratio of atoms that cannot be separated by physical means.

B. both substances have a set ratio of atoms that can be separated by physical means.

C. both substances have the same physical and chemical properties.

D. both substances have the same physical properties, but different chemical properties.


2) Felipe made a toy boat out of clay, but it kept sinking in water. He changed the boat's design by making it slightly wider than before. Why did Felipe's newly designed boat float on water?

A. He decreased the density by increasing the volume.

B. He decreased the density by decreasing the volume.

C. He increased the density by increasing the volume.

D. He increased the density by decreasing the volume.


My Answer is:

1~ C.) both substances have the same physical and chemical properties.

2~ C.) He increased the density by increasing the volume.

Answer 1

1. C CAN'T be right. Water is a liquid and CO2 is a gas so they don't have the same physical properties and you know they don't have the same chemical properties.
2. see below.

Answer 2

SO Sorry !

Answer 3

Cheeks

Answer 4

dcacbabcbbacbaa is not the answers I promise :(