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scoundrel [369]
3 years ago
12

CAN SOMEONE PLEASE HELP

Chemistry
1 answer:
ira [324]3 years ago
8 0

Answer:

ummmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm I don't know

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How does a balanced chemical equation illustrate that mass is never lost or gained in a chemical reaction?​
monitta

Answer:

Explanation:

Because if the equation is truly balanced, the elements on one side equal the element numbers on the other. Take a simple example.

Ba(OH)2 + 2HCl ==> BaCl2 + 2HOH

Now consider what is true.

Element            Number of the left            Number on the right.

Ba                             1                                              1

O                              2                                             2

H                               4                                            4

Cl                              2                                             2

Nothing has changed going from the left to the right. You may wonder how you get 4 for the hydrogens.

Ba(OH)2  has 2 hydrogens. You multiply the 2 by the hydrogens in the brackets.

2HCl = The 2 in front affects both the hydrogens and the chlorines. There are 2 hydrogens from the HCl

Total: 2 + 2 = 4 hydrogens. The right side is done the same way.

You are not getting different results on the right side than those that you had on the left. Mass is preserved. 1 Ba + 2 Os + 4Hs and 2 Cls on the left, gives the same numbers on the right. There is no loss of mass.

8 0
3 years ago
Why does a substances density decrease as it heats up
mariarad [96]

Answer:

Heating a certain substance causes molecules to speed up and spread slightly further apart, having a larger volume that results in a decrease in the density. Cooling a substance causes molecules to slow down and get closer together, occupying a smaller volume that results in the increase in density.

Explanation:

7 0
3 years ago
Which statement best describes an effect of tension acting on Earthis crudo
shtirl [24]

Answer:

layers of rock get folded

3 0
4 years ago
If I add 2.75 g of CaO to 155 mL of distilled water, what will be the concentration of the solution be?
IRINA_888 [86]
M = m/L
moles of CaO = 2.75g / molar mass
2.75g/ 56.08g = 0.049moles CaO
155mL / 1000 = 0.155 L
M= 0.049moles/0.155L
M=0.316
7 0
2 years ago
Which of these is a chemical property?
Katyanochek1 [597]
Yes, refer to the previous answer.
6 0
4 years ago
Read 2 more answers
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