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Anuta_ua [19.1K]
3 years ago
15

The atomic mass of carbon-13 is 13. It has six protons. How many neutrons does this isotope have?

Chemistry
2 answers:
grigory [225]3 years ago
6 0
It would have 7 neutrons.

Nikolay [14]3 years ago
3 0
The number of neutrons is the mass number-number of protons. In this case, the mass number is 13. You have 6 protons. To find the number of neutrons you can subtract 6 from 1. The answer is 7 neutrons.
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Explanation:

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3 years ago
What is the [H+] in a solution with pOH of 0.253?
sergey [27]
PH + pOH = 14

pH + 0.253 = 14

pH = 14 - 0.253

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Answer:

Hope this helps!

Explanation:

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6 0
3 years ago
What is the mass of a piece of iron that releases 179.85 joules of heat as it cools from 51.29 degrees Celsius to 31.42 degrees
Sedaia [141]

Answer:

20.11 g.

Explanation:

What is given?

c (specific heat of iron) = 0.450 J/g °C.

Q (heat energy) = 179.85 J.

ΔT (change of temperature) = |31.42 °C - 51.29 °C| = 19.87 °C.

What do we need? Mass of iron (m)

Step-by-step solution:

Let's see the formula of specific heat:

c=\frac{Q}{m\cdot\Delta T}

Where c is specific heat, Q is heat energy, m is mass and ΔT is the change of temperature.

We just have to solve for 'm' to find the mass of iron and replace the given data that we have, like this:

m=\frac{Q}{c\cdot\Delta T}=\frac{179.85\text{ J}}{0.450\text{ }\frac{J}{g\cdot\degree C}\cdot19.87\degree C}=20.11\text{ g.}

The mass of the iron would be 20.11 g.

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1 year ago
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Answer:

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3 years ago
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