a sample Of water is heated by 520 cal in the temperature rises by 10 K what is the mass of the water sample in grams?
1 answer:
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Answer:
Explanation:
The molality of a solution, m is defined as the number of moles of the solute that is dissolved in 1 kg of solvent.
m = number of moles/kilogram of solvent
Attached is the answer and complete question.
Answer:
The structure of stearic acid (octadecanoic acid) is shown in the attachment below
Explanation:
Stearic acid is an example of a saturated fatty acid. The structure of stearic acid is shown in the attachment below.
The reaction is as follows:
2 H₂(g) + O₂(g) → 2 H₂O(g) . ΔH = - 483.5 kJ
Using the change in enthalpy and heat, calculate the moles as follows:
Moles of H₂ = -
x 2 mol H₂
= - 216 kJ / (-483.5 kJ) x 2 mol H₂
= 0.893 mol H₂
Calculate the mass of H₂ using the moles and molar mass as follows:
0.893 mol H₂ x (2.02 g H₂ / 1 mol H₂) = 1.79 g H₂
Therefore, the mass of hydrogen gas is 1.79 g
2 H₂(g) + O₂(g) → 2 H₂O(g) . ΔH = - 483.5 kJ
Using the change in enthalpy and heat, calculate the moles as follows:
Moles of H₂ = -
= - 216 kJ / (-483.5 kJ) x 2 mol H₂
= 0.893 mol H₂
Calculate the mass of H₂ using the moles and molar mass as follows:
0.893 mol H₂ x (2.02 g H₂ / 1 mol H₂) = 1.79 g H₂
Therefore, the mass of hydrogen gas is 1.79 g