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Vadim26 [7]
2 years ago
15

Which energy resource causes the greatest waste disposal concerns?.

Chemistry
1 answer:
Mashcka [7]2 years ago
6 0

Answer:

Coal

Explanation:

Coal produces more pollution than any other energy source. While coal produces just 44% of U.S. electricity, it accounts for 80% of power plant carbon emissions. Burning coal leads to soot, smog, acid rain, global warming, and carbon emissions.

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Which principal energy level of an atom contains an electron with the lowest energy?
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The answer is a.n=1 because it makes sence
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Estimate the standard internal energy of formation of liquid methyl acetate (methyl ethanoate, ch3cooch3) at 298 k from its stan
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solution:

the reaction for formation of methyl acetate is\\CH_{3}OH+CH_{3}COOH----------->CH_{3}COOCH_{3}+H_{2}O\\standard internal energy \\\delta u=\delta H -\delta(pv)=\delta H -\delta n\times RT\\where \delta n=change in number of moles=0\\\delta u=\delta H\\=-442kj/mol

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What 2 instruments are commonly used to measure air pressure?
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<span>I think it is the barometer and aneroid barometer</span>
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3 years ago
A 0.15 m aqueous solution of a weak acid has a freezing point of -0.31 °C. What is the percent ionization of this weak acid at t
tensa zangetsu [6.8K]

Answer:

11%

Explanation:

1) Calculate van 't Hoff factor:

Δt = i Kf m

0.31 = i (1.86) (0.15)

i = 1.111

2) Calculate value for [H+]:

CCl3COOH ⇌ H+ + CCl3COO¯

total concentration of all ions in solution equals:

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This is a molality, but we will act as if it a molarity since we will assume the density of the solution is 1.00 g/cm3, which makes the molarity equal to the molality.

0.1665 = (0.15 − x) + x + x

x = 0.0165 M

3) Calculate the percent dissociation:

0.0165/ 0.15 = 11 %

4 0
3 years ago
How many moles of gas are contained in a rigid, sealed, 5 L container, at 1 atm of pressure and 22 oc?
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The ideal gas law is: PV=nRT
Pressure
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R= gas constant
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(1.00atm)(5.00L)/(.08026)(295K)= .207mol of gas
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3 years ago
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