Acceleration involves a change in A. time B. direction C. speed D. either b or c

Chemistry

2 answers:

olga_2 [115]2 years ago

7 0

Answer:

The answer is D. Acceleration involves a change in direction and speed.

Explanation:

Since velocity (speed of something) is a vector (direction),it can change either in magnitude or in direction.

deff fn [24]2 years ago

5 0

Answer:

Explanation:

Think about it. If you accelerate, you go faster. This means you change speed.

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2 years ago

9. Circle the atom in each pair that has the greater ionization energy.

Sedbober [7]

A: BE has more ionization energy than LI

B: CA has more ionization energy than BA.
C: NA has more ionization energy than K

D: AR has more ionization energy than P

E: CI has a more ionization energy than SI
F: LI has more ionization energy than K

If any of these are wrong feel free to correct me in the comments.

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2 years ago

The activation energy of a certain uncatalyzed reaction is 64 kJ/mol. In the presence of a catalyst, the Ea is 55 kJ/mol. How ma

Ksivusya [100]

Answer:

About 5 times faster.

Explanation:

Hello,

In this case, since the Arrhenius equation is considered for both the catalyzed reaction (1) and the uncatalized reaction (2), one determines the relationship between them as follows:

$\frac{k_1}{k_2}=\frac{Aexp(-\frac{Ea_1}{RT} )}{Aexp(-\frac{Ea_2}{RT})} \\\frac{k_1}{k_2}=\frac{exp(-\frac{Ea_1}{RT} )}{exp(-\frac{Ea_2}{RT})}$