Question

Which is most likely to occur during a chemical reaction?

a.) atoms of the original substance are lost
b.) new atoms are created
c.) the original substance maintains its properties
d.) mass is conserved

Answer 1

solve for the given variable

-5z-15=-10z+5
z=____

Answer 2

solve the following linear equation.

2(9z+2)-5=192
z=___

Answer 3

thats wrong

Answer 4

d.) mass is conserved

During a chemical reaction, the law of conservation of mass states that mass is neither created nor destroyed. Although atoms may be rearranged to form new substances with different properties, the total amount of mass remains constant. The atoms involved in the reaction are neither lost (a.) nor created (b.), and the properties of the original substance do not remain unchanged (c.), as new substances with new properties are formed.

Answer 5

Let's solve the equation for z by moving all terms containing z to one side and constant terms to the other side:

-5z - 15 = -10z + 5

First, add 10z to both sides of the equation to move the terms with z to the left side:

-5z + 10z - 15 = -10z + 10z + 5
5z - 15 = 5

Next, add 15 to both sides to move the constant term to the right side:

5z - 15 + 15 = 5 + 15
5z = 20

Finally, divide both sides by 5 to solve for z:

5z / 5 = 20 / 5
z = 4

So the value of z is 4.

Answer 6

To solve for z, we first want to expand the equation and then isolate z.

2(9z + 2) - 5 = 192

Distribute the 2 into the parentheses:

18z + 4 - 5 = 192

Combine the constant terms:

18z - 1 = 192

Next, add 1 to both sides to isolate the terms with z:

18z - 1 + 1 = 192 + 1
18z = 193

Finally, divide both sides by 18 to solve for z:

18z / 18 = 193 / 18
z = 193 / 18

z = 10.7222222...

Since we are looking for an exact value, z = 10.7222222... can be simplified to z = 10 13/18 if we want to express it as a mixed number. However, in decimal form, z is approximately 10.72.

Answer 7

Apologies for the confusion. Let's go through the problem carefully again:

2(9z + 2) - 5 = 192

First, distribute the 2 into the parentheses:

18z + 4 - 5 = 192

Combine the like terms (the constants):

18z - 1 = 192

Next, add 1 to both sides to isolate the terms with z:

18z - 1 + 1 = 192 + 1
18z = 193

Finally, divide both sides by 18 to solve for z:

18z / 18 = 193 / 18
z = 193 / 18

Now dividing 193 by 18 gives us:

z = 10.7222222...

So the exact value for z, in this case, should be:

z = 10.7222222... (as a decimal) which can also be written as:

z ≈ 10.72 (rounded to two decimal places)

If z ≈ 10.72 was deemed incorrect, let's retry the division to get an exact fraction:

193 ÷ 18 = 10 with a remainder of 13.

So, 193 divided by 18 is 10 and 13/18.

Therefore, the exact value for z is:

z = 10 and 13/18 (as a mixed number)

Or, expressed as an improper fraction:

z = (18 * 10 + 13) / 18 = 193 / 18

Both expressions are equivalent to the exact decimal value given before. If this clarification does not resolve the issue, please ensure the original equation and values provided are accurate.