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Dmitriy789 [7]
3 years ago
9

Lokesh is sawing boards to make a deck. What is the area of the deck?

Chemistry
2 answers:
dezoksy [38]3 years ago
8 0

Answer:

Explanation:

171

Alekssandra [29.7K]3 years ago
4 0

Answer: The answer would be B. 171 square feet

Explanation:

I took the test and got it right / Hope it helps!:)

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Which of the following statements best describes a food web?
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A solution of H2SO4 (90.08 g/mol) has 785.6 g of H2SO4 and 359 g of H2O. What is the molal concentration (molality)?
tekilochka [14]

The molality of H₂SO₄ solution is 24.2 m.

<u>Explanation:</u>

We need to find the molality of sulfuric acid.

Mass of sulfuric acid = 785.6 g

Mass of water = 359 g

We have to find the moles of H₂SO₄ by using its mass and molar mass as,

Moles of H₂SO₄ = $\frac{785.6g}{90.08 g/mol}

                         = 8.7 moles

Mass of the solution in kg =$\frac{359}{1000} =  0.359 kg

Molality = $\frac{moles}{solvent (kg)}

           = $\frac{8.7 mol }{0.359 kg}\\

          = 24.2 m

So molality of the H₂SO₄ solution is 24.2 m.

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3 years ago
67g of K2O is how many moles
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