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3 years ago

Someone please help!!! please :(

Chemistry

1 answer:

fiasKO [112]3 years ago

8 0

Answer:

To convert from mols to grams, multiply the number by the total molar mass of the compound.

To find the approximate molar mass of a compound, add up the molar masses of each element in the compound, making sure to multiply by the subscripts.

#2 for example:

First, find the molar mass of NaCl.

Molar mass of Na= 22.990g (refer to a periodic table or look it up)

Molar mass of Cl= 35.45g

22.990g + 35.45g= 58.44g

Next, convert from mols to g.

2.19 mol x 58.44g= 127.98g NaCl

To convert from grams to mols, do the same thing as mols to grams except DIVIDE instead of multiply.

#3 for example:

NaC2H3O2

Na= 22.99g

C2= 12.011 x 2 => 24.022g (multiply molar mass of C by 2 since there are 2 carbons)

Do this for the rest of the elements in the compound and add them up. The total molar mass should be approximately 82.0343g.

Next, convert from g to mol.

14.68g/82.0343g≈ 0.179 mol

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