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maks197457 [2]
3 years ago
7

Which of the following are correctly balanced reactions?Check all that apply.

Mathematics
2 answers:
Alex787 [66]3 years ago
7 0
To determine whether the given chemical reaction is indeed balanced, we just have to do elemental balance in which we determine if there are equal number of the same elements in both sides of the equation. From the choices, the balanced chemical equation are letters B and C. 
Fynjy0 [20]3 years ago
6 0

Answer:

B and C

Step-by-step explanation:

We are given that

A.Mg+FeO \rightarrow 2Fe+MgO

On left side

Number of atoms of Fe =1

Number of atoms of O=1

Number of atoms of Mg=1

On right side

Number of atoms of Fe=2

Number of atoms of O=1

Number of atoms of Mg=1

Therefore ,the balance reaction is

2Mg+2 FeO\rightarrow 2 Fe +2MgO

Given reaction is not balanced reaction

B.2H_2+O_2\rightarrow 2H_2O

Number of atoms of oxygen and hydrogen  are equal on both sides .

Hence, the given reaction is balanced .

C.2K+Br_2\rightarrow 2KBr

The number of atoms of potassium and bromine are equal on both sides.

Therefore, the given reaction is balanced .

D.C+Cl_2\rightarrow CCl_4

Number of atoms of Chlorine are not equal on both sides therefore, the given reaction is not balanced.

Hence,option B and C are true.

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Answer : x = 20

Explanation :
3x + 2x +20 + 4x - 20 = 180

(3+2+4=9)

9x + 20 - 20
The 20s cancel each other out because one is positive and the other is negative

9x = 180

9x/9 = 180/9

X = 180 divided by 9

X = 20
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The author uses paragraph 12 to create tension because of <u>D.The author</u> increases a feeling of discomfort with descriptions of conflict and disagreement.

<h3>What is tension in storytelling?</h3>

Tension is a storytelling technique to ensure that readers do not drop a novel but keep readers engaged.

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Some authors use the following strategies to create tension?

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