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4 years ago

How do atoms in a molecule stick together?

2 answers:

7 0

Molecules are groups of atoms that stay together because of chemical bonds. These can be covalent bonds, where electrons are shared between atoms or ionic bonds where the difference in (positive or negative) charge between ions causes them to attract. To summarize, its because of chemical bonds.

andre [41]4 years ago

4 0

Atoms are held together with both electromagnetic force and strong force.

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A solution is made using 200.0 mL of methanol (density 0.792 g/mL) and 985.1 mL of water (density 1.000 g/mL). What is the mass

DaniilM [7]

Answer: The mass percent of methanol in solution is 13.85 %

Explanation:

To calculate the mass of water, we use the equation:

$\text{Density of substance}=\frac{\text{Mass of substance}}{\text{Volume of substance}}$

For water:

Density of water = 1.000 g/mL

Volume of water = 985.1 mL

Putting values in above equation, we get:

$1.000g/mL=\frac{\text{Mass of water}}{985.1mL}\\\\\text{Mass of water}=(1.000g/mL\times 985.1mL)=985.1g$

For methanol:

Density of methanol = 0.792 g/mL

Volume of methanol = 200.0 mL

Putting values in above equation, we get:

$0.792g/mL=\frac{\text{Mass of methanol}}{200.0mL}\\\\\text{Mass of methanol}=(0.792g/mL\times 200.0mL)=158.4g$

To calculate the mass percent of methanol, we use the equation:

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

Mass of solution = [158.4 + 985.1] g = 1143.5 g

Mass of methanol = 158.4 g

Putting values in above equation, we get:

$\text{Mass percent of methanol}=\frac{158.4g}{1143.5g}\times 100=13.85\%$

Hence, the mass percent of methanol in solution is 13.85 %

3 0

3 years ago

Phosphorus p4 burns in oxygen to form diphosphorus pentoxide what is the balanced chemical equation representing this chemical r

ahrayia [7]

Answer:

P₄ + 5O₂ → 2P₂O₅

Explanation:

Phosphorus burn in the presence of air and produced diphosphorus pentoxide.

Chemical equation:

P₄ + O₂ → P₂O₅

Balanced chemical equation:

P₄ + 5O₂ → 2P₂O₅

Equation is balanced because there are four phosphorus atoms ans ten oxygen atoms in both side of equation.

Coefficient with reactant and product:

P₄ 1

O₂ 5

P₂O₅ 2

7 0

3 years ago

Xavier and Fatima both work at a local convenience store, Mac. Their supervisor, Gerald, has just decided to make them take turn

Kamila [148]

Answer:

I don't flipping know like sue me

5 0

3 years ago

In a diamond, what type of bonds link carbon atoms together to form a network solid?

never [62]

The answer is covalent bond

5 0

3 years ago

PLZ HLP 100pts If the egg and the earth experience EQUAL and OPPOSITE forces, why does the earth barely move?

Mama L [17]

Answer:

Inside the earth, the rock is so softened by heat that it slowly moves and flows. The Earth is like an egg.

Explanation:

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(Hoped I helped! If I missed anything please tell me and I will try again! )

6 0

4 years ago

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