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Mila [183]
3 years ago
15

Isotopes are atoms of the same element with different numbers of

Chemistry
1 answer:
vlada-n [284]3 years ago
5 0

Answer:

neutron

Explanation:

which affects mass number

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Which of the following measurements has FOUR significant figures?
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A certain first-order reaction 45% complete in 65seconds, determine the rate constant and the half life for the process ​
masha68 [24]

The rate constant : k = 9.2 x 10⁻³ s⁻¹

The half life : t1/2 = 75.3 s

<h3>Further explanation</h3>

Given

Reaction 45% complete in 65 s

Required

The rate constant and the half life

Solution

For first order ln[A]=−kt+ln[A]o

45% complete, 55% remains

A = 0.55

Ao = 1

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ln A = -kt + ln Ao

ln 0.55 = -k.65 + ln 1

-0.598=-k.65

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2. What do acidic solutions have high concentrations of? ​
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Hydrogen ions
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7 0
2 years ago
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