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sineguguhopengw3912
02.10.2019 •
Chemistry
How many grams of nacl do you need to prepare 200 ml of a 5m solution? the molecular weight of nacl is 58.4 g/mol. smol 0.2l-1mol nacl lib imol naclx 8.glol nacl mol 58.19 nac
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Ответ:
58.4 grams of NaCl is needed to prepare 200 ml of a 5M solution.
HOW TO CALCULATE MASS:
The mass of a substance can be calculated by multiplying the number of moles by the molar mass of the substance as follows:Mass of substance = no. of moles × molar massHowever, we need to calculate the number of moles in 200 ml of a 5M solution of NaCl by multiplying the molarity by the volume. Volume = 200mL = 0.2Lno. of moles of NaCl = 0.2L × 5Mno. of moles = 1 molMolar mass of NaCl is given as 58.4g/molMass of NaCl = 1 × 58.4Mass of NaCl = 58.4grams. Therefore, 58.4 grams of NaCl is needed to prepare 200 ml of a 5M solution.Learn more at: link
Ответ:
The answer to your question is: 58.4 g of NaCl
Explanation:
Data
Volume = 200 ml = 0.2 l
Concentration = 5M
MW = 58.4 g
mass NaCl = ?
Formula
Molarity = (# of moles ) / volume
# of moles = Molarity x volume
# of moles = 5 x 0.2
# of moles = 1
58.4 g 1 mol
x 1 mol
x = (1 x 58.4) / 1
x = 58.4 g of NaCl
Ответ:
Its 2 man
Explanation: