3 years ago

ANSWER ASAP IF YOU KNOW THIS ......What is the mass number of this atom?

Chemistry

2 answers:

trasher [3.6K]3 years ago

6 0

The correct answer is 7 I just took the test :)

Fittoniya [83]3 years ago

3 0

The answer is 7 I took this test.

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Sentence form: Skin cells reproduce by mitosis and have 46 chromosome pairs.

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The 3 in 4p3 represents:

Marrrta [24]

B) the number of electrons

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The reactant concentration in a second-order reaction was 0.560 m after 115 s and 3.30×10−2 m after 735 s . what is the rate con

Aloiza [94]

Use the formula for second order reaction:

$\frac{1}{C} = \frac{1}{C_0} + kt$

C = concentration at time t
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k = rate constant
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2nd Equation: $\frac{1}{0.033} = \frac{1}{C_0} + 735k$

Find $\frac{1}{C_0}$ from 1st equation and put it in 2nd equation:

$\frac{1}{0.033} = \frac{1}{0.56} - 115k + 735k$

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Answer:

Nickel is the answer

Explanation:

Lol that's easy the atomic number is the same number as the number of electrons.

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