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castortr0y [4]
3 years ago
8

Which of the following statements (is/are) true?(Select all that apply.)Chemical formulas show the symbols of the elements in a

compound along with their relative sizes.Anions are formed when an atom gains or loses electrons.Forces holding atoms together in a compound are called chemical bonds.Ionic bonds result from the sharing of electrons.The structural formula for water is H2O.An atom that has a net positive charge is called a cation.None of the above statements is true.
Chemistry
1 answer:
inna [77]3 years ago
6 0

Answer:

Forces holding atoms together in a compound are called chemical bonds and An atom that has a net positive charge is called a cation

Explanation:

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Chemical equations must be balanced to satisfy ...?
murzikaleks [220]

Answer:

the law of conservation of matter.

Explanation:

I am in chem

4 0
3 years ago
Read 2 more answers
What is the volume of 15.2 grams of SO2 at STP?
kiruha [24]

5.512 litres is the volume of  15.2 grams of sulphur dioxide gas at STP.

Explanation:

Data given:

mass of sulphur dioxide = 15.2 grams

conditions is at STP whech means volume = 22.4 litres

atomic mass of sulphur dioxide = 64.06 grams/mole

Number of moles is calculated as:

number of moles = \frac{mas}{atomic mass of 1 mole}

Putting the values in the equation:

number of moles = \frac{15.2}{64.06}

                              = 0.23 moles

Assuming that sulphur dioxide behaves as an ideal gas, we can calculate the volume as:

When 1 mole of sulphur dioxide occupies 22.4 litres at STP

Then 0.23 moles of sulphur dioxide occupies 22.4 x 0.23

= 5.152 litres is the volume.

5 0
4 years ago
Use the equation: 2Mg + O2→ 2MgO
ludmilkaskok [199]

Answer:

3 moles of O2 needed

Explanation:

2 moles of Mg   to one mole O2

   so 3 moles of O2 needed

6 0
2 years ago
SiCl4 + H2O = H4SiO4 + HCl
vichka [17]

Hey there!

Balance the equation:

SiCl₄ + H₂O → H₄SiO₄ + HCl

Balance H.

2 on the left, 5 on the right. Add a coefficient of 3 in front of H₂O and a coefficient of 2 in front of HCl.

SiCl₄ + 3H₂O → H₄SiO₄ + 2HCl  

Balance O.

3 on the left, 4 on the right. Change the coefficient of 3 in front of H₂O to a 4.

SiCl₄ + 4H₂O → H₄SiO₄ + 2HCl  

This unbalanced our H, so change the coefficient of 2 in front of HCl to a 4.

SiCl₄ + 4H₂O → H₄SiO₄ + 4HCl  

Balance Cl.

4 on the left, 4 on the right. Already balanced.

Balance Si.

1 on the left, 1 on the right. Already balanced.

Our final balanced equation:

SiCl₄ + 4H₂O → H₄SiO₄ + 4HCl

Hope this helps!

8 0
4 years ago
Whose main job is to help a plant cell make proteins
hoa [83]

Answer:

Water

Explanation:

Because water is very important

7 0
3 years ago
Read 2 more answers
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