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Topic: **Atom homework****Question:**
what is the formula for calculating moles, # of atoms, and mass of a substance. i need this for my chemistry homework, and i have a test on it tomorrow! please help! (:
one example is...
calculate the number of moles in the following mass: 0.039g of palladium?

June 16, 2019 / By Hughie

Moles = Given mass / Molecular weight # of atoms = avogrado's number 6.0221415 × 1023 your example 0.039g / 106.40 = 3.67e -4 moles

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Did you like the answer? We found more questions related to the topic: **Atom homework**

C40H60O60 3.61x10^24 O atoms per mole / 6.022x10^22 molecules per mole = 60 O atoms per molecule

You need the periodic table to look up the molecular weight (listed as grams per mole) in this case it's 106.42 grams per mole 3.66472 * 10^-4 moles To calculate the number of atoms you need to use avogadros number.

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Okay, so a mole is literally 6.022 * 10^23. If you have a mole of jelly beans, then you have 6.022 * 10^23 jelly beans. Therefore, to convert from moles to atoms, or from moles to molecules you just multiply by 6.022 * 10^23 (Avogadro's number). Likewise, to convert from atoms to moles, or molecules to moles you just divide by 6.022 * 10^23. 1. 9.67 * 10^23 atoms / 6.022 * 10^23 = 1.61 mol 2. 1.16 * 10^-5 moles * 6.022 * 10^23 = 6.99 * 10^18 atoms

its simple mathematics as 1) 6.022 x 10^23 atoms = 1 mole then , 9.67 x 10 ^ 23 atoms = 1 x 9.67 x 10^23 / ( 6.022x 10^23) ........................................... = 1.606 moles 2) this one should try . its easy .then only u will understand

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