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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:

C. 2 = 37

Step-by-step explanation:

<2 and 37 are vertical angles and vertical angles are equal

Angle 1 and 37 form a straight line so they add to 180

<1 + 37 = 180

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Angle 3 and 37 form a straight line so they add to 180

<3 + 37 = 180

<3= 180-37 = 143

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Step-by-step explanation:

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What is the rate of change of y with respect to x for this function?​
lilavasa [31]

Answer:

Given the function: y=f(x) = 3x+2

when x=-2 at the beginning of the interval [-2, 5],

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y = 3x+2 begins at

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and

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y has changed -4 to 17, which is a change of 17-(-4)= 17+4 = 21

and x has changed from -2 to 5, which is a change of 5-(-2)=5+2=7

So, the average rate of change of y with respect to x over the interval

[-2, 5] is given by ;

=

Therefore, the average rate of change y with respect to x over the interval is, 3

Step-by-step explanation:

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What is the y-intercept of a line perpendicular to y = x + 6 that passes through the point (4 ,-3)?
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