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vovikov84 [41]
4 years ago
10

Mass number is equal to

Chemistry
1 answer:
ValentinkaMS [17]4 years ago
4 0
The answer : protons and neutrons







Mark me as brainliest ?❤️
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Adding energy or increasing the speed of the particles at very low pressure in a solid would cause
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The answer is c, bc we are talking about a solid and adding more energy to a solid makes it melt. 
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The two algae seen here are classified as green algae. That means they make their own food by photosynthesis. The algae on the l
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C

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Why do cells remove waste
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So more cells appear

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Can someone please do this worksheet for me? God bless
Dmitrij [34]

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The straight carbon links indicate butane.

The hydrogen atoms are replaced by the methyl radical:

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4 years ago
For a reaction A + B → products, the following data were collected. Experiment Number Initial Concentration of A (M) Initial Con
Afina-wow [57]

Answer:

Rate constant k = 1.57*10⁻⁵ s⁻¹

Explanation:

Given reaction:

A\rightarrow B

Expt    [A] M        [B] M         Rate [M/s]

1          3.40         4.16           1.82*10^-4

2         4.59         4.16           3.32*10^-4

3.        3.40          5.46          1.82*10^-4

Rate = k[A]^{x}[B]^{y}

where k = rate constant

x and y are the orders wrt to A and B

To find x:

Divide rate of expt 2 by expt 1

\frac{3.32*10^{-4} }{1.82*10^{-4} } =\frac{[4.59]^{x} [4.16]^{y} }{[3.40]^{x} [4.16]^{y} }\\\\x =2

To find y:

Divide rate of expt 3 by expt 1

\frac{1.82*10^{-4} }{1.82*10^{-4} } =\frac{[3.40]^{x} [5.46]^{y} }{[3.40]^{x} [4.16]^{y} }\\\\y =0

Therefore: x = 2, y = 0

Rate = k[A]^{2}[B]^{0}

To find k

Use rate for expt 1:

k = \frac{Rate1}{[A]^{2} } =\frac{1.82*10^{-4}M/s }{[3.40]^{2} } =1.57*10^{-5} s-1

6 0
3 years ago
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