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kvv77 [185]
3 years ago
11

I need HELP!!

Chemistry
2 answers:
alex41 [277]3 years ago
6 0

Answer: Hit not Hard it is Hoc2 (Hydgergon Perocide)

Explanation: Water plus co(g)= HoC2

jok3333 [9.3K]3 years ago
6 0

Answer : The enthalpy change for the reaction is, 269 kJ/mol

Explanation :

The given chemical reaction is:

H_2+CO_2\rightarrow CO+H_2O

As we know that:

The enthalpy change of reaction = E(bonds broken) - E(bonds formed)

\Delta H=[(B.E_{H-H})+(2\times B.E_{C=O})]-[(2\times B.E_{O-H})+(1\times B.E_{C\equiv C})]

Given:

\Delta H = enthalpy change

B.E_{H-H} = 436 kJ/mol

B.E_{O-H} = 463 kJ/mol

B.E_{C=O} = 799 kJ/mol

B.E_{C\equiv C}  = 839 kJ/mol

Now put all the given values in the above expression, we get:

\Delta H=[(436kJ/mol)+(2\times 799kJ/mol)]-[(2\times 463kJ/mol)+(1\times 839kJ/mol)]

\Delta H=269kJ/mol

Therefore, the enthalpy change for the reaction is, 269 kJ/mol

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graduated cylinder is filled with water to a volume of 6.2 ML. an irregular shaped plastic object weighing 1.2 g is placed in th
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A. Density of object = 0.86 g/mL

B. The object will float in the water.

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The following data were obtained from the question:

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A. Determination of the density of the object.

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Volume (V) of object = 1.39 mL

Density (D) of object =?

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Density = 1.2/1.39

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B. Determination of whether the object will float or sink.

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Answer:

C. CH3COOH, Ka = 1.8 E-5

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∴ pKa = - Log Ka

A. pKa = - Log (1.0 E-3 ) = 3

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