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cupoosta [38]
2 years ago
7

How many atom in protons

Chemistry
1 answer:
Alex Ar [27]2 years ago
7 0

Answer:

Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).

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According to the graph, how much Potassium bromide can be dissolved in 100 g of warer at 40C?
xenn [34]
At 40 degrees Celsius, approximately 78 grams of potassium bromide can be dissolved.
6 0
3 years ago
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What is the most important role that water plays for living organisms?
Flauer [41]

Answer:

A. All organisms need water as energy source

8 0
3 years ago
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A vessel contained N2, Ar, He, and Ne. The total pressure in the vessel was 987 torr. The partial pressures of nitrogen, argon,
xz_007 [3.2K]

Answer:

The partial pressure of neon in the vessel was 239 torr.

Explanation:

In all cases involving gas mixtures, the total gas pressure is related to the partial pressures, that is, the pressures of the individual gaseous components of the mixture. Put simply, the partial pressure of a gas is the pressure it exerts on a mixture of gases.

Dalton's law states that the total pressure of a mixture of gases is equal to the sum of the pressures that each gas would exert if it were alone. Then:

PT= P1 + P2 + P3 + P4…+ Pn

where n is the amount of gases present in the mixture.

In this case:

PT=PN₂ + PAr + PHe + PNe

where:

  • PT= 987 torr
  • PN₂= 44 torr
  • PAr= 486 torr
  • PHe= 218 torr
  • PNe= ?

Replacing:

987 torr= 44 torr + 486 torr + 218 torr + PNe

Solving:

987 torr= 748 torr + PNe

PNe= 987 torr - 748 torr

PNe= 239 torr

<u><em>The partial pressure of neon in the vessel was 239 torr.</em></u>

4 0
3 years ago
How many grams of mgcl2 is produced if 4. 67 moles of hcl react
frosja888 [35]

The mass of MgCl₂ produced is 5.685 grams.

<h3>What is mass?</h3>

Mass is the quantity of matter of a physical body.

The reaction is

Mg   +   2HCl   →    MgCl₂ + H₂

2 mole of HCl

(2 × 36.458) = 72.8 g        

                   

1 moles of MgCl₂

(1 × 95.21 g) = 95.21 g

1 g  Mg will produce = \dfrac{95. 21}{78.2}

4.67 mol Mg will produce

\dfrac{95. 21}{78.2} \times 4.67 = 5.685

Thus, the mass of MgCl₂ produced is 5.685 grams.

Learn more about mass

brainly.com/question/19694949

#SPJ4

7 0
1 year ago
Elements chemically combine in various ways to form most substances on Earth. These chemically combined elements are called ____
AleksAgata [21]

Answer:

compounds

Explanation:

the actual term would be chemical compound

3 0
2 years ago
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