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AlladinOne [14]
3 years ago
12

What does it mean for an equation to be balanced and why must you keep an equation in balance?

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
7 0
When you talk about balanced equations you are talking about chemistry.

Chemical equation balance is to make sure that there are the same number of atoms of a given element in the right side than in the left side.

It is a chemical principle, the atoms do not create or destroy in a chemical reaction, then you have to count the same number of every kind of atoms in the left side than in the right side.

For example:H2 + O2 -> H2O is not balanced because there two atoms of oxygen in the left side and  1 atom of oxygen in the right side.

To balance this equation you have to insert coefficients:

2H2 + O2 -> 2H2O. Now you have 4 atoms of hydrogen in each side, and 2 atoms of oxygen in each side, making sure that none atoms was created or destroyed in the reaction. 
dlinn [17]3 years ago
4 0
An equation is balanced when both sides of the equation are equal to each other, hence making the equals sign in-between accurate. You must keep an equation balanced because, if you do not, the sides are not equal and your equal sign is false, leading your whole equation to be false.
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r-ruslan [8.4K]

Answer:

If 2/3 ton of gravel covers 3/4 of a driveway, you need to divide 2/3 divided by 3 to find how much is needed for 1/4 of the driveway. So first step:

1. 2/3 divided by 3 = 2/3 * 1/3. So 2/9.

2. Add 2/3 plus 2/9= 8/9 ton of gravel to cover the whole driveway.

Step-by-step explanation:

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3 years ago
The seismic activity density of a region is the ratio of the number of earthquakes during a given time span to the land area aff
Karolina [17]

The correct statement about the earthquake in the state is option c. State A had approximately 3,362 more earthquakes than State B.

<h3>How to solve for the earthquake in the state A</h3>

we have x/y = 0.00299

y = 163696

To solve for x we have

163696 * 0.00299

= 4895 earthquakes

<h3>Next we have to solve for earth quakes in state B</h3>

x = 0.1402 x 10931

= 1533

Next we have to find the difference

4895 - 1533 = 3362 earthquakes.

We have to conclude that state A has 3362 earthquakes more than B. Hence the answer is c.

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Complete question

The seismic activity density of a region is the ratio of the number of earthquakes during a given time span to the land area affected. The table shows the land area and seismic activity density.

Which statement about the number of earthquakes the states had for the given time span is true?

State A had approximately 1,533 more earthquakes than State B.

State B had approximately 1,533 more earthquakes than State A.

State A had approximately 3,362 more earthquakes than State B.

State B had approximately 3,362 more earthquakes than State A.

8 0
1 year ago
6. In his car, John can drive 75 miles on 5 gallons of gas. He drove
Brilliant_brown [7]

Answer: 55 Miles

Step-by-step explanation:

75x11=825

11x5=55

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3 years ago
The measure of the supplement of an angle is 20° more than three times the measure of the original angle. find the measures of t
viva [34]

If the original angle is x degrees then its supplement is 180 - x degrees.

we have the equation:-

180 - x = 3x + 20

160 = 4x

x = 40

The original angle is 40 degrees and its supplement is 140 degrees

3 0
3 years ago
The sum of two numbers is 68 . the smaller number is 12 less than the larger number. what are the numbers?
galben [10]
The larger number is 56 because if you do 68-12=56
5 0
3 years ago
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