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Keith_Richards [23]
3 years ago
13

Which option states the principle behind the law of conservation of mass and the law of conservation of energy?

Chemistry
1 answer:
jeka943 years ago
7 0

Answer:

A

Explanation:

The law of conservation of mass states that matter can never be created nor destroyed but can be converted from one form to another.

The law of conservation of energy posits that energy cannot be created nor destroyed but can be converted from one form to another.

These laws are the basic laws of existence. Although the laws have been adjusted, they still form the basic principle behind several scientific laws and are responsible for a whole lot of scientific advancements.

While the first law focuses on matter and the content of matter in a body, the second law basically focuses on energy. The second law serves to support the inter convertibility behind the several forms or types of energy.

For example, to do many useful work at home, it is found that energy is converted from its electric form to say heat in an electric iron to press our clothes.

Also, the first law is a fundamental principle useful in the balancing of our chemical equations.

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Which is the most important question for deciding if a chemical reaction has occurred?
777dan777 [17]

Answer:

all these are physical properties except release of heat so it's probably heat energy given off

7 0
3 years ago
Read 2 more answers
The sum of two numbers is 54 one exceed the other by 14 find the number​
Aneli [31]

Answer:

x=34

y=20

Explanation:

let the first number be 'x'

let the second number be 'y'

Equation 1:-

x + y = 54

Equation 2:-

x = y + 14  (Since one exceeds the other by 14)

Substituting Equation 2 in Equation 1:-

(y + 14) + y = 54

=> y + 14 + y = 54

=> 2y + 14 = 54

=> 2y = 54 - 14

=> 2y = 40

=> y = 40/2

=> y = 20

Now in Equation 1:-

x + y = 54

Substituting y=20,

x + 20 = 54

x = 54 - 20

x = 34

7 0
3 years ago
74 g Potassium Chloride converted to moles
kramer

Answer:

Number of moles = 0.99  mol

Explanation:

Given data:

Mass of potassium chloride = 74 g

Number of moles of potassium chloride = ?

Solution:

Formula:

<em>Number of moles = mass/molar mass</em>

Molar mass of KCl = 74.6 g/mol

now we will put the values in formula:

Number of moles = mass/molar mass

Number of moles =  74 g/ 74.6 g/mol

Number of moles = 0.99  mol

5 0
3 years ago
PLEASE HELP ASAP!!!!!!
Alinara [238K]
C. Gravity acting on the edges of plates and convection in the mantle. So you were correct!
7 0
3 years ago
Read 2 more answers
Question 7 (5 points)
cupoosta [38]

Answer: 18 g

Explanation:

0.12=\frac{\text{mass of NaCl}}{140}\\\text{mass of NaCl}=(0.12)(140)=16.8 \text{ g}

The option closest to this is <u>18 g</u>

7 0
2 years ago
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