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matrenka [14]
3 years ago
8

Carbon reacts with oxygen to produce carbon dioxide (CO2 (g), Delta.Hf = –393.5 kJ/mol) according to the equation below. Upper C

(s) plus 2 upper O subscript 2 (g) right arrow upper C upper O subscript 2 (g). What is the enthalpy change of the reaction? Use Delta H r x n equals the sum of delta H f of all the products minus the sum of delta H f of all the reactants.. –393.5 kJ –196.8 kJ 196.8 kJ 393.5 kJ
Chemistry
2 answers:
PSYCHO15rus [73]3 years ago
7 0

Answer:

A on edge

Explanation:

swat323 years ago
3 0

Answer:

-393.5 kJ

Explanation:

E2020

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Explanation:

1)

Molarity=\frac{\text{Mass of substance}}{\text{Molar mass of substance}\times \text{Volume of solution(L)}}

Mass of NaOH = m

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1.00 M=\frac{m}{40 g/mol\times 1.00 L}

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A student can prepare the solution by dissolving the 40. grams of NaOH in is small volume of water and making that whole volume of solution to volume of 1 L.

Upto two significant figures mass should be determined.

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M_1V_1=M_2V_2 (dilution equation)

Molarity of the NaOH solution = M_1=2.00 M

Volume of the solution = V_1=?

Molarity of the NaOH solution after dilution = M_2=1.00 M

Volume of NaOH solution after dilution= V_2=1 L

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V_1=\frac{1.00 M\times 1.00 L}{2.00 M}=0.500 L

A student can prepare NaOH solution of 1.00 M by diluting the 0.500 L of 2.00 M solution of NaOH with water to 1.00 L volume.

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