# Write a balanced chemical equation for the reaction of solid strontium with fluorine gas.

## Answers

Answer 1
Answer:

### Answer:

Sr(s) + F₂(g) → SrF₂(s)

### Explanation:

• A balanced equation is an equation that has an equal number of atoms of elements on either side of the equation.
• Chemical equations are balanced to obey the law of conservation of mass which states that the mass of reactants and that of the product should always be equal in chemical reactions.
• Therefore, the balanced chemical equation for the reaction between Sr and F₂ is given by;

Sr(s) + F₂(g) → SrF₂(s)

• Each side of the equation has 1 atom of Sr and two atoms of F thus the equation is balanced.
Answer 2
Answer:

### Final answer:

Solid Strontium reacts with Fluorine gas in a synthesis reaction to form Strontium Fluoride. The balanced chemical equation is Sr (s) + F2 (g) -> SrF2 (s).

### Explanation:

The reaction of solid strontium (Sr) with fluorine gas (F2) is a synthesis reaction, and it forms strontium fluoride (SrF2). The balanced chemical equation for this reaction is:

Sr (s) + F2 (g) → SrF2 (s)

In this equation, 's' stands for solid, 'g' stands for gas, and the arrow ( → ) indicates the direction of the reaction from reactants to products.

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## Related Questions

Shaun’s doctor has recommended that he consume 200 calories of protein a day. Shaun consumed 176 calories of protein in one day. How much more protein does he need to consume to reach the required amount?

### Answers

Answer:

24 calories of protein

Explanation:

200 - 176 = 24 calories

What is an ionic bond?

### Answers

Ionic bond is formed when there is a transfer of electron(s) from metallic atom to non-metallic atom.

The correct answer to the question is Option B. A bond resulting from the transfer of 1 or more electrons

Ionic bond exist between a metal and a nonmetal.

In this bonding, the metal losses it's valence electron to form a stable metallic ion, while the nonmetal receives the electron from the metal to form a stable nonmetallic ion which results in the formation of an ionic compound.

With the above information, we can see that ionic bond involves a transfer of electron(s).

Thus, the correct answer to the  question is Option B. A bond resulting from the transfer of 1 or more electrons.

See attachment image

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Answer: B

Explanation:

Ionic bonding is the complete transfer of electron(s) between atoms. It is a type of chemical bond that generates two oppositely charged ions. In ionic bonds, the metal loses electrons to become a positively charged cation, whereas the nonmetal accepts those electrons to become a negatively charged anion.

Describe the structure of an atom. A)The nucleus is the dense center of the atom composed of protons and neutrons. Surrounding the nucleus is an electron cloud composed of electrons.

B)The nucleus is the dense center of the atom composed of electrons and neutrons. Surrounding the nucleus is an electron cloud composed of protons.

C)The electron cloud is the dense center of the atom composed of electrons. Surrounding the electron cloud is a nucleus composed of protons and neutrons.
Eliminate
D)The electron cloud is the dense center of the atom composed of protons and neutrons. Surrounding the electron cloud is a nucleus composed of electrons.

### Answers

A is the correct answer I took this tes a few weeks ago.

### Final answer:

An atom is structured into a central nucleus containing protons and neutrons, surrounded by an electron cloud that houses the electrons. This is similar to the solar system with the nucleus as the sun and the electrons as the planets revolving around it.

### Explanation:

The structure of an atom is organized into two main parts: the nucleus and the electron cloud. The nucleus is the dense central part of the atom and is composed of protons and neutrons. Surrounding the nucleus, in various energy levels or orbits, is a space known as the electron cloud, which contains the electrons.

This structure can be related to the solar system where the nucleus represents the sun and the electrons depict the planets revolving around it. The correct statement that describes the structure of an atom, therefore is option A).

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In this reaction, how many grams of O2 are required to completely react with 110 grams of Al

### Answers

You'd need
33.6 g
of aluminium to react with that much manganese dioxide.
So, you've got your balanced chemical equation for this reaction
3
M
n
O
2
(
s
)
+
4
A
l
(
s
)

3
M
n
(
s
)
+
2
A
l
2
O
3
(
s
)

The mole ratio that exists between manganese dioxide and aluminium is simply the ration between the stoichiometric coefficients placed in front of them.
In your case, the balanced chemical equation shows that you have 3 moles of manganese dioxide reacting with 4 moles of aluminium; this means that your mole ratio will be
3:4
.
Likewise, the mole ratio between aluminium and manganese dioxide will be
4:3

4 moles of the former need 3 moles of the latter.
You can put this mole ratio to good use by determining how many moles of aluminium are needed to react with the number of moles of manganese dioxide present in 81.2 g. So,
81.2 g MnO
2

1 mole
86.94 g
=
0.9340 moles

M
n
O
2

This means that you'll need
0.934 moles
M
n
O
2

4 moles Al
3 moles
M
n
O
2
=
1.245 moles Al
To determine the number of grams needed to get that many moles use aluminium's molar mass
1.245 moles Al

26.98 g
1 mole Al
=
33.59 g Al

Rounded to three sig figs, the answer will be
m
aluminium
=
33.6 g

Change 32L of carbon dioxide into moles of carbon dioxide

### Answers

32L —> 32000g —> 727.116 Moles (rounded)

A steak that is well cooked is a chemical change or physical change?

### Answers

It would be a chemical change because you can no longer go back to its original form.
its a chemical change becuase juices are leaving the steak