What is the molar mass for Mn2O7, an oxide of manganese?

Answer 1

It is 221.87 g/mol.

The molar mass of Mn is 54.94g/mol and the mass of O is 15.999 g/mol. Multiply the molar mass of Mn by 2 and the molar mass of O by 7 then just add.

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Answer 2

Wyatt Atkins

The molar mass is #221.8g/"mol"#

We know the molar mass of #1# mole of manganese is #54.9# g from the periodic table, and that the molar mass of #1# mole of oxygen is #16.0# g.

Now to find the molar mass just multiply and add as required:

#"molar mass" = 2(54.9 g/(mol)) + 7(16.0 g/(mol))#

#"molar mass" =109.8 g/"mol" + 112 g/"mol"#

#"molar mass" = 221.8 g/"mol"#

Hopefully this helps!

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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.