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zzz [600]
3 years ago
7

0.71 g Cu equals how many moles

Chemistry
2 answers:
storchak [24]3 years ago
5 0
The correct answer is 0.011330374846536 Hope this helps ;D
astraxan [27]3 years ago
3 0

Answer: 0.011 moles

Explanation:

According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the moles, we use the equation:

given mass = 0.71 g

Molar mass= 63.5 g

\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

\text{Number of moles}=\frac{0.71g}{63.5g/mol}=0.011moles

The number of moles is 0.011 moles.

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3 years ago
A chemist prepares a solution of sodium thiosulfate by measuring out of sodium thiosulfate into a volumetric flask and filling t
Volgvan

The question is incomplete, here is the complete question:

A chemist prepares a solution of sodium thiosulfate by measuring out 110. g of sodium thiosulfate into a 350. mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in mol/L of the chemist's sodium thiosulfate solution. Be sure your answer has the correct number of significant digits.

<u>Answer:</u> The concentration of sodium thiosulfate solution is 1.99 mol/L

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}

Given mass of sodium thiosulfate = 110 g

Molar mass of sodium thiosulfate = 158.1 g/mol

Volume of solution = 350 mL

Putting values in above equation, we get:

\text{Molarity of sodium thiosulfate}=\frac{110\times 1000}{158.1\times 350}\\\\\text{Molarity of sodium thiosulfate}=1.99mol/L

Hence, the concentration of sodium thiosulfate solution is 1.99 mol/L

5 0
4 years ago
What is the empirical formula of C2H8NO2
Lyrx [107]
I wish I could help but I’m not sure sorry
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