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2 years ago

Will give brainliest if you answer quickly and correctly :)

Chemistry

2 answers:

joja [24]2 years ago

5 0

Answer:

C. I (iodine)

Explanation:

it would be Iodine because it has 5 energy levels of electrons and has a total of 74 neutrons inside its nucleus!

Hope this helps, have a good day!

AnnZ [28]2 years ago

3 0

I think it’s I
Iodine has 53 protons and 74 neutrons

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If the distance between two objects is increased, the gravitational force will _____.

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Answer:

Decrease by the distance squared

Explanation:

Gravitation formula:

$F=\frac{GMm}{r^{2}}$

where

'F' is the force of attraction between the two bodies (Gravitational force),

'G' is the universal gravitational constant,

'M' is the mass of the first object,

'm' is the mass of the second object and

'r' is the distance between the centers of each object.

Hence, with the increase by distance between two objects , the gravitation decreases by the distance squared

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steposvetlana [31]

Answer: The number of atoms of bromine present in given number of mass is $1.03\times 10^{22}$

Explanation:

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Given mass of bromine = 1.37 g

Molar mass of bromine = 79.904 g/mol

Putting values in above equation, we get:

$\text{Moles of bromine}=\frac{1.37g}{79.904g/mol}=0.0171mol$

According to mole concept:

1 mole of an element contains $6.022\times 10^{23}$ number of atoms.

So, 0.0171 moles of bromine will contain = $0.0171\times 6.022\times 10^{23}=1.03\times 10^{22}$ number of bromine atoms.

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3 years ago

A glass of water contains 1.2 x 1024 molecules of water. An additional 4.0 moles of water are poured into the glass. How many mo

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2 years ago

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Explanation:

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The balanced chemical reaction is:

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