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Karo-lina-s [1.5K]
3 years ago
12

1). How many moles of H₂ would be required to produce 9.0 grams of water?

Chemistry
1 answer:
kramer3 years ago
3 0

1. How many moles of H₂ would be required to produce 9.0 grams of water?

The answer would be approximately 0.4495 moles of H₂.

2. What mass of H₂O is formed when excess H₂ reacts with 64 g of O₂?

A mass of  72g H₂O will be formed.

3.How many moles of SnF₂ will be produced along with 48 grams of H₂?

Approximately 23.811 moles of SnF₂ will be produced.

4. How many moles of sodium are required to produce 40. grams of NaOH?

The answer would be approximately 1.000722 moles of sodium.

I could only answer 4 of them so sorry, I had like check over it.

The last 2 were super confusing for me.

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Determine the volume of water to be added to the nitric acid solution at a concentration of 8.61 mol / L to prepare 500 mL of th
Alex_Xolod [135]

Answer:

398 mL

Explanation:

Using the equation for molarity,

C₁V₁ = C₂V₂ where C₁ = concentration before adding water = 8.61 mol/L and V₁ = volume before adding water, C₂ = concentration after adding water = 1.75 mol/L and V₂ = volume after adding water = 500 mL = 0.5 L

V₂ = V₁ + V' where V' = volume of water added.

So, From C₁V₁ = C₂V₂

V₁ =  C₂V₂/C₁

= 1.75 mol/L × 0.5 L ÷ 8.61 mol/L

= 0.875 mol/8.61 mol/L

= 0.102 L

So, V₂ = V₁ + V'

0.5 L = 0.102 L + V'

V' = 0.5 L - 0.102 L

= 0.398 L

= 398 mL

So, we need to add 398 mL of water to the nitric solution.

6 0
3 years ago
Question 2 of 10
mart [117]
D, democritus is the answer i got
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Read 2 more answers
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