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stiks02 [169]
3 years ago
7

This quiz gonna kill me please help

Chemistry
2 answers:
Sauron [17]3 years ago
7 0

Explanation:

cro ro rvdhfrodj jhpjbcdhjcjcdosjd

Pie3 years ago
7 0

Answer:

Periodic table of elements

Explanation:

I am so sorry I can't help you out.

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Given:
bulgar [2K]

Answer:

The combustion of 59.7 grams of methane releases 3320.81 kilojoules of energy

Explanation:

Given;

CH₄ + 2O₂ → CO₂ + 2H₂O, ΔH = -890 kJ/mol

From the combustion reaction above, it can be observed that;

1 mole of methane (CH₄) released 890 kilojoules of energy.

Now, we convert 59.7 grams of methane to moles

CH₄ = 12 + (1x4) = 16 g/mol

59.7 g of CH₄ = \frac{59.7}{16} = 3.73125 \ moles

1 mole of methane (CH₄) released 890 kilojoules of energy

3.73125 moles of methane (CH₄) will release ?

= 3.73125 moles x  -890 kJ/mol

= -3320.81 kJ

Therefore, the combustion of 59.7 grams of methane releases 3320.81 kilojoules of energy

5 0
3 years ago
What is the only letter not appearing on the periodic table?.
ivolga24 [154]

Answer:

The answer is j

Explanation:

3 0
2 years ago
Can anybody do this?
Alenkinab [10]

Answer:this should be c

Explanation:

4 0
2 years ago
What diffuses more quickly: tetracarbon decahydride (C4H10) or iodine (12)? By how much?
ValentinkaMS [17]

Answer: Butane will effuse more quickly because it has a smaller molar mass

Explanation:

Molar mass of C4H10 = 58.123 g/mole

Molar mass of I2 = 253.808 g/mole

5 0
3 years ago
Indicate the pH value as pH < 7, pH = 7 or PH > 7 for each of the following substances.
Galina-37 [17]

Explanation:

a) PH>7

b)PH=7

c)PH>7

d) PH>7

5 0
3 years ago
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