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3 years ago

Practice: How many protons, neutrons and electrons are in the following?

Chemistry

2 answers:

Nata [24]3 years ago

6 0

Answer:

The answer to your question is below

Explanation:

When we have the number of an element followed by a number, that number is the atomic mass.

Atomic mass is the number of protons plus neutrons.

Protons Neutrons

Carbon-13 6 13 - 6 = 7

Chromium-51 24 51- 24 = 27

Strontium-88 38 88 - 38 = 50

Boron-10 5 10 - 5 = 5

BartSMP [9]3 years ago

6 0

Answer:

a p 6 n 7

Explanation:

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How many molecules are in 12.5g of water (H2O)?

Katyanochek1 [597]

Answer:

.694 moles

Explanation: do given over one so 12.5 over 1 then multiply that by 1 over 18.01528( atomic mass of water) and then you get ans answear that you sig fig but i did that for you

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3 years ago

4) A granola bar has a mass of 42.9 g and the granola bar contains 26.20% honey

nata0808 [166]

<u>Answer:</u>

The percentage of honey in one granola bar is 26.02 percent.

<u>Explanation:</u>

The weight of 1 granola bar is 42.9 grams. The grams of honey that is present in one granola bar is equal to 26.02 percent of 42.9 = 11.16 g

Now the amount of honey in the factory is given as 189.5g the weight of total granola bars would be

$= 42.9/11.16 x 189.5= 728.25$

So no. of granula bars $=728.25/42.9 =16.9$ that can be Approximated to nearly 17

Now if one box has 6 bars then 17 bars will have to fit inside three boxes

7 0

2 years ago

A 6.68-g aqueous solution of isopropyl alcohol contains 3.97 g of isopropyl alcohol. What is the mass percentage of isopropyl al

Sphinxa [80]

Answer : The mass percentage of isopropyl alcohol in the solution is, 59.4 %

Explanation :

To calculate the mass percentage of isopropyl alcohol in the solution, we use the equation:

$\text{Mass percent of isopropyl alcohol}=\frac{\text{Mass of isopropyl alcohol}}{\text{Mass of isopropyl alcohol solution}}\times 100$

Mass of isopropyl alcohol = 6.68 g

Mass of isopropyl alcohol solution = 3.97 g

Putting values in above equation, we get:

$\text{Mass percent of isopropyl alcohol}=\frac{3.97g}{6.68g}\times 100=59.4\%$

Thus, the mass percentage of isopropyl alcohol in the solution is, 59.4 %

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2 years ago

What do you think is meant by the phrase "a balanced diet"?

Maurinko [17]

To have the right combinations of foods to provide nutrients

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3 years ago

What volume(in mL) of a 0.500 M fructose(C6H12O6) solution can be made from 11.3 g of fructose?

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2 years ago