C3 Flashcards

1
Q

What is Mr?

A

relative atomic mass of all the atoms in the molecular formula added together

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2
Q

What is Ar?

A

the relative atomic mass of an individual element.

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3
Q

What does the mole mean?

A

Amount of a substance

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4
Q

What is the formula for the number of moles?

A

mass in g (of an element/compound) /

Mr (of the element/compound)

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5
Q

What is always conserved in chemical reactions?

A

mass

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6
Q

What happens to atoms in chemical equations?

A

atoms are never created or destroyed

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