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stiv31 [10]
2 years ago
14

Calculate the molarity of a solution prepared by dissolving 13.0 g of Na2CrO4 in enough water to produce a solution with a volum

e of 800. mL .
Express the molarity to three significant digits.
Chemistry
1 answer:
Lelechka [254]2 years ago
8 0

Answer:

molar mass sodium chromate = 162g

12.6g ÷ 162g/mole = moles sodium chromate (This is the solute)

molalrity or M = moles solute ÷ lliters of solution (You'll have to change given mL to L)

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Answer:

W = 6.65 \cdot 10^{6} lbf

Explanation:

To find the weight (W) of the pond contents first we need to use the following equation:

W = m\cdot g   (1)

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Also, we have that the mass is:

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Where ρ is the density and V the volume

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By entering equation (2) and (3) into (1) we have:

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W = 75.3 lbm/ft^{3}*50 m*25 m*2 m*9.81 m/s^{2}  

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Therefore, the weight of the pond is 6.65x10⁶ lbf.

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