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SpyIntel [72]
3 years ago
7

Mass and energy are conserved Question 13 options: A) only in chemical changes. B) always in physical changes and sometimes in c

hemical changes. C) only in physical changes. D) in chemical changes and physical changes.
Chemistry
1 answer:
Roman55 [17]3 years ago
3 0

Answer:

B

Explanation:

sometimes it can change chemically but not all the time.

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frez [133]
Idk I’m sorry. I just need points lol
4 0
3 years ago
Are parts of the circulatory system<br> .The<br> , and
Sphinxa [80]

Answer:

The heart and the blood vessels are a part of the circulatory system. The blood vessels include the arteries, veins and capillaries. The lungs are considered to be the pulmonary part of the circulatory system. The heart is the cardiovascular part of the circulatory system and the vessels are the systemic part of the circulatory system. The main function of the circulatory system is to supply all parts of the body with oxygenated blood and to take away the deoxygenated blood from all parts of the body.

8 0
3 years ago
A/1 * B/C =D
Novay_Z [31]
<h3>Answer:</h3>

                  0.64 Moles of Propane

<h3>Explanation:</h3>

Data:

         Moles of Carbon  =  1.5 mol

         Conversion factor  =  7 mol C produces = 3 mol of Propane

Solution:

             As we know,

                7 moles of Carbon produces =  3 moles of Propane

Then,

            1.5 moles of Carbon will produce  =  X moles of Propane

Solving for X,

                     X =  (1.5 moles × 3 moles) ÷ 7 moles

                     X  =  0.6428571 moles of Propane

Or rounded to two significant figures,

                     X =  0.64 Moles of Propane

5 0
2 years ago
What is the amount of moles for 12.0 g Ar?
Digiron [165]

if i am correct it shall be 12. because i am thinking, 1 mole = 1 ar.

8 0
3 years ago
Read 2 more answers
Which of the following elements does not form hydride by direct heating with
ozzi
I believe the answer is A.

Hope this helps! ^^
4 0
2 years ago
Read 2 more answers
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