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Advocard [28]
4 years ago
5

30.00 grams of H3PO4

Chemistry
1 answer:
Mekhanik [1.2K]4 years ago
7 0

Answer:

Number of moles = 0.31 mol

Explanation:

Given data:

Mass of H₃PO₄ = 30.0 g

Number of moles = ?

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of H₃PO₄ = 98 g/mol

Number of moles = 30.0 g / 98 g/mol

Number of moles = 0.31 mol

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How many moles of carbon dioxide gas should be produced when 10.0 g of C2H6 are combusted at STP?
Finger [1]

Answer:

                    0.665 moles of CO₂

Explanation:

                     The balance chemical equation for the combustion of Ethane is as follow:

                            2 C₂H₆ + 7 O₂ → 4 CO₂ + 6 H₂O

Step 1: <u>Calculate moles of C₂H₆ as;</u>

                              Moles  =  Mass  /  M.Mass

Putting values,

                              Moles  =  10.0 g / 30.07 g/mol

                              Moles  =  0.3325 moles

Step 2: <u>Calculate Moles of CO₂ as;</u>

According to balance chemical equation,

                    2 moles of C₂H₆ produced  =  4 moles of CO₂

So,

             0.3325 moles of C₂H₆ will produce  =  X moles of CO₂

Solving for X,

                      X  =  0.3325 mol × 4 mol ÷ 2 mol

                      X = 0.665 moles of CO₂

3 0
3 years ago
Higher volumes of water can carry greater loads.<br> true<br> false
Reptile [31]

Answer:

True

Explanation:

Hopefully this helps!

6 0
3 years ago
Read 2 more answers
A chemist burns 650.0 g of C4H8S2 in excess oxygen, according the following balanced chemical reaction:
Andrews [41]

Answer:

952.2g SO3

Explanation:

Molar mass of C4H8S2 is 120.2363 g/mol

Mol in 750.0g = 750.0/120.2363 = 6.238 mol

1mol C4H8S2 produces 2 mol SO3

6.238 mol will produce 2×6.238 = 12.476 mol SO3

Molar mass SO3 = 32+3×16 = 80.0g/mol

Theoretical yield = 12.476×80.0 = 998.08g

The actual yield is 95.4%

Actual mass-produced = 95.4/100×998.08 = 952.2g SO3 produced

Hope it will help you.

7 0
3 years ago
What experimental evidence leads scientists to believe that only quantized electronic energy states exist in atoms?
MAXImum [283]
Absorption and emmision spectrum experiment.
3 0
3 years ago
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What is the percent of Li in Li3N ? Please!!
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I think it maybe 59.7852%
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