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? asked in Science & MathematicsChemistry · 6 years ago

I need some chem help?

I have a couple chemistry problems that I can't seem to figure out

Here they are

How many moles of Neon are in 7.53x10^23 atoms of Neon?

What is the molar mass of Sucrose (C12H22O11)?

How many grams are in 3 moles of Water?

Update:

Also this

the formula for caffeine is C3H10N4O2. how many total atoms are in 0.75 moles of caffeine

2 Answers

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  • ChemTeam
    Lv 7
    6 years ago

    7.53x10^23 atoms divided by 6.022 x 10^23 atoms/mole = 1.25 mol

    342.2948 g/mol

    54 g (if you want to be technical about it, give 50 as the answer. it has one sig fig just like 3 does.)

  • Anonymous
    5 years ago

    I do not consider that this is right

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