Which of these is NOT an example of a pure substance? A a tablet of the element known as calcium B a glass of muddy water
C a glass of ice and water
D a chemical compound known as aluminium oxide

a glass of muddy water

Explanation:

Pure substances contain only one element or compound.

Calcium is one element so it is a pure substance. Ice and water have the same molecular structure, so it is a pure substance. Aluminum oxide is a chemically pure compound.

The only example that is not a pure substance is muddy water due to the multiple components of mud mixing with the components of water.

Hope that helps.

answer: i don't know

explanation:

you need to provide a picture, otherwise i can't tell you.

if you can provide one, i'd be more than happy to you with this!

the farther away the object is from the central star (the sun) it's gravitainal pull on the object is weaker when it is farther

explanation: