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ozzi
3 years ago
5

A multivitamin tablet contains 40 milligrams of potassium. how many moles of potassium does each tablet contain?

Chemistry
2 answers:
katrin2010 [14]3 years ago
7 0
Conversion of mole to grams
k in mole = 1 mole/ atomic mass
K in mole =1/ 39.0983 g/mole
                = 0.255765 g/mole
converting 40 grams of K
 K 40 grams x [ 1 mole/ 39.0983 grams] = 1.0230623 mole
There are 1.0230623 moles of K in 40 K of Potassium

Reika [66]3 years ago
4 0

Answer : The moles of potassium is 1.02\times 10^{-3}mol

Explanation : Given,

Mass of potassium = 40 mg = 0.04 g

conversion used : 1 mg = 0.001 g

Molar mass of potassium = 39 g/mol

Now we have to calculate the moles of potassium.

Formula used :

\text{Moles of potassium}=\frac{\text{Mass of potassium}}{\text{Molar mass of potassium}}

Now put all the given values in this formula, we get:

\text{Moles of potassium}=\frac{0.04g}{39g/mol}=1.02\times 10^{-3}mol

Therefore, the moles of potassium is 1.02\times 10^{-3}mol

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<h3>Further explanation  </h3>

Equalization of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

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  • give coefficient

aKOH (aq) + bHNO₃ (aq) ⇒ KNO₃ (aq) + cH₂0 (l)

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