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slega [8]
3 years ago
12

Describe 5 importance matter to undergo changes​

Chemistry
1 answer:
Rzqust [24]3 years ago
3 0

Answer:

melting, freezing, sublimation, deposition, condensation, and vaporization. These changes

Explanation:

hope it helps...i dont know if its right but i hope it helps

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How are the atomic number and the number of protons related to each other?
SpyIntel [72]

Answer:

Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.

Explanation:

5 0
3 years ago
How many moles of water can be obtained from the reaction of 4 moles of O2?
Yuliya22 [10]

Answer: 8moles

Explanation:

The reaction below shows the formation of 2 moles of water from 2 moles of hydrogen and 1 mole of oxygen respectively.

2H2(g) + O2 (g) --> 2H2O(l)

So, if 1 mole of O2 produce 2 mole of H2O

4 moles of O2 will produce Z mole of H2O

To get the value of Z, cross multiply

1 x Z = 4 x 2

Z = 8

So, the equation will be 8H2(g) + 4O2 (g) --> 8H2O(l)

Thus, 4 moles of O2 will produce 8moles of H2O .

6 0
3 years ago
Determine which choice is an example of an endothermic process.
klemol [59]

Answer:

D. Baking bread

Explanation:

In this process, energy is absorbed and in an endothermic process energy is absorbed too.

6 0
3 years ago
Tanner adds 10 grams of dry sand to 100 milliliters of warm salt water. This mixture is stirred and placed on a table. When Tann
Ivenika [448]
He will most likely find that  the sand has sunken to the bottom because the molecules in sand are to powerful to break apart and disslove.
8 0
3 years ago
Read 2 more answers
The volume of a gas at STP is 7.30 L. What is the quantity of gas in this sample?
sladkih [1.3K]

0.326 moles of gas

Explanation:

Knowing the volume of a gas at standard temperature and pressure (STP) we may calculate the number of moles of the gas using the following formula:

number of moles = volume / 22.4 (L /mole)

number of moles of gas = 7.3 (L) / 22.4 (L /mole)

number of moles of gas = 0.326 moles

Learn more about:

molar volume

brainly.com/question/7144003

brainly.com/question/11160940

#learnwithBrainly

3 0
3 years ago
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