15.630 g milk chocolate bar ks found to contain 9.815g of sugar. how many milligrams of sugar does the bar contain?
2 answers:
<u>Answer:</u> The mass of sugar that the bar contains is 9815 milligrams.
<u>Explanation:</u>
We are given:
Mass of milk chocolate bar = 15.630 g
Mass of sugar in it = 9.815 g
Converting the mass from grams to milligrams, we use the conversion factor:
1 g = 1000 mg
So,
Hence, the mass of sugar that the bar contains is 9815 milligrams.
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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
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