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Paha777 [63]
2 years ago
7

The nuclear disintegration series of ________ is the source of radon-222 in soil.

Chemistry
1 answer:
marissa [1.9K]2 years ago
3 0

The nuclear disintegration series of 238-U is the source of radon-222 in soil.

<h3>What is nuclear disintegration ?</h3>
  • The process of nuclear disintegration is how an unstable atomic nucleus loses energy through radiation.
  • A substance that has unstable nuclei is regarded as radioactive.
  • Alpha, beta, and gamma decay are three of the most prevalent types of decay, and they all entail the emission of one or more particles.
  • Ionizing radiation offers a health concern by destroying tissue and the DNA in genes because it can damage the atoms in living things.
  • Alpha particles may be present in the ionising radiation that is released.
  • As one atom transforms into another, radioactive decay involves the emission of a particle and/or energy.
  • Helium ions are released from an atom's nucleus during alpha decay. A neutron in the nucleus is converted to a proton and electron during beta decay.

Learn more about radioactive decay here:

brainly.com/question/1770619

#SPJ4

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What is the percent composition of NaHCO3?
zhuklara [117]

Answer:

                Option-C (27.36% Na, 1.20% H, 14.30% C, and 57.14% O)

Explanation:

<em>Percent Composition</em> is defined as the <u><em>%age by mass of each element present in a compound</em></u>. Therefore, it is a relative amount of each element present in a compound.

Calculating Percent Composition of NaHCO₃:

1: Calculating Molar Masses of all elements present in NaHCO₃:

              a) Na  =  22.99 g/mol

             b) H  =  1.01 g/mol

              c) C  =  12.01 g/mol

              d) O₃  =  16.0 × 3 =  48 g/mol

2: Calculating Molecular Mass of NaHCO₃:

              Na  =  22.99 g/mol

             H    =  1.01 g/mol

              C    =  12.01 g/mol

              O₃  =  48 g/mol

                       ----------------------------------  

Total                  84.01 g/mol

3: Divide each element's molar mass by molar mass of NaHCO₃ and multiply it by 100:

For Na:

                 =  22.99 g.mol⁻¹ ÷ 84.01 g.mol⁻¹ × 100

                 =  27.36 %

For H:

                 =  1.01 g.mol⁻¹ ÷ 84.01 g.mol⁻¹ × 100

                 =  1.20 %

For C:

                 =  12.01 g.mol⁻¹ ÷ 84.01 g.mol⁻¹ × 100

                 =  14.29 % ≈ 14.30 %

For O:

                 =  48.0 g.mol⁻¹ ÷ 84.01 g.mol⁻¹ × 100

                 =  57.13 % ≈ 57.14 %

8 0
3 years ago
How many milliliters of sterile water for injection should be added to a vial containing 5 mg/mL of a drug to prepare a solution
jonny [76]

Answer:

7mL of sterile water is the initial amount of the concentrated solution is 3mL

Explanation:

In this problem, the vial must be <em>diluted </em>from 5mg/mL to 1.5mg/mL, that means the solution must be diluted:

5mg/mL / 1.5mg/mL = 3.33 times

If the initial amount of the drug in the vial is 3mL, the final volume must be:

10mL

That means the volume of water that should be added is:

10mL - 3mL:

<h3>7mL of sterile water is the initial amount of the concentrated solution is 3mL</h3>
4 0
3 years ago
Describe a way to separate iron filings from sand.
nikklg [1K]
Use a magnet to separate the iron from the sand.
8 0
3 years ago
Read 2 more answers
Agitation prevents settling in a?
VashaNatasha [74]
D gaseous mixture I hope it helps
5 0
3 years ago
Phương trình hóa học là gì
Doss [256]

Explanation:

sự xuất bản hóa học nào? có một câu hỏi về khoa học mà bạn cần giúp đỡ? tôi luôn ở đây để giúp đỡ!

7 0
2 years ago
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