What is the mass of one mole of beryllium if the atomic mass of beryllium is 9.01?

Answer 1

#9.01" g"#.

A mole is defined as the amount of a substance whose mass in grams equals the atomic, molecular, or formula-unit mass in atomic mass units.

Example 1: Water (#"H"_2"O"#) has two hydrogen atoms and one oxygen atom per molecule. The two hydrogen atoms each have an atomic mass of #1.008#, the oxygen atom has an atomic mass of #15.999#, the sum for all three atoms is #18.015#. So a mole of water molecules has a mass of #18.015" g"#.

Example 2: Beryllium has an aromuc mass of #9.01#. So a mole of beryllium atoms has a mass of #9. 01" g"#.

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Answer 2

Peyton Adams

A single mole of beryllium weighs roughly 9.01 grams.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.