2 years ago

What are elements?

Chemistry

2 answers:

Viefleur [7K]2 years ago

7 0

B I hope this helps you

Serhud [2]2 years ago

4 0

Answer:

B. They are the substances that make up all

matter in the universe.

Explanation:

Elements are pure substance that pretty much make everything in the world. For example, water is made up of hydrogen and oxygen. Humans are made of nitrogen, oxygen, hydrogen, and carbon.

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How many moles are there in 13g of KMnO4?

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=> Moles in 13g of KMnO4 = $\frac{Mass}{Relative-atomic-mass}$ = $\frac{13}{158}$ = 0.082278.. = 0.08 moles

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3 years ago

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