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andrew-mc [135]
2 years ago
15

What three countries are considered the ‘big three’ when it comes to space programs and are the only countries to successfully l

aunch human missions to space?
A. Canada, the United States, and Japan
B. China, France, and the United States
C. United States, Russia, and China
D. Japan, United States, and France
Chemistry
1 answer:
Colt1911 [192]2 years ago
8 0

Answer:

C. United States, Russia, and China

Explanation:

Only three nations (Russia, U.S., China) have launched their own crewed spacecraft, with the Soviets/Russians and the American programs providing rides to other nations' astronauts. Twenty-seven "first flights" occurred on Soviet or Russian flights while the United States carried fourteen.

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Answer:

E₁ ≅ 28.96 kJ/mol

Explanation:

Given that:

The activation energy of a certain uncatalyzed biochemical reaction is 50.0 kJ/mol,

Let the activation energy for a catalyzed biochemical reaction = E₁

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Now, to calculate the activation energy for the catalyzed reaction going by the following above parameter;

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\frac{K_1}{K_2} = e^{\frac{-E_1-E_2}{RT}

E_1= E_2-RT*In(\frac{K_1}{K_2})

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E_1 = 28957.39292  J/mol

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