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zavuch27 [327]
3 years ago
13

* Gravity affects the mass of a brick. True False

Chemistry
2 answers:
Inessa05 [86]3 years ago
8 0

Answer:

True

Explanation:

Because anything that has mass also has gravity

Aleksandr [31]3 years ago
7 0
True because anything that has a mass is affected by gravity no matter what it is
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Yes because the stigma rises above the gas I think that’s is it
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3 years ago
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Boron has primarily two isotopes, one with an atomic mass of 11.0 amu and another with an atomic mass of 10.0 amu. If the abunda
Masja [62]

Answer:

The atomic mass of the boron atom would be <em>10.135</em>

Explanation:

This is generally known as relative atomic mass.

Relative atomic mass or atomic weight is a physical quantity defined as the ratio of the average mass of atoms of a chemical element in a given sample to the atomic mass of 1/12 of the mass of a carbon-12 atom. Since both quantities in the ratio are masses, the resulting value is dimensionless; hence the value is said to be relative and does not have a unit.

<em>Note that the relative atomic mass of atoms is not always a whole number because of it being isotopic in nature.</em>

  • <em>Divide each abundance by 100 then multiply by atomic mass</em>
  • <em>Do that for each isotope, then add the two result. Thus</em>

Relative atomic mass of Boron = (18.5/100 x 11) + (81/100 x 10)

                                                 = 2.035 + 8.1

                                                 = 10.135

5 0
3 years ago
5.<br> This ancient element symbol<br> means ...<br> A. copper<br> B. silver<br> c. gold<br> D. tin
earnstyle [38]

Answer:

A im pretty sure

Explanation:

4 0
3 years ago
What structure would you only find in plant cells?
KengaRu [80]

Answer:

vacuole, cell wall, and plastids such as chloroplasts.

Explanation:

hope this helps u

8 0
3 years ago
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If you have 100 g of radioactive isotope with a half-life of 10 years:
labwork [276]
<h3>Answer:</h3>

#1. 50 g

#2. 25 g

#3. 4 half lives

<h3>Explanation:</h3>

<u>We are given;</u>

  • Original mass of a radioisotope as 100 g
  • Half life of the radioisotope as 10 years

We need to answer the questions:

#a. Mass remaining after 10 years

Using the formula;

Remaining mass = Original mass × 0.5^n , where n is the number of lives.

In this case, since the half life is 10 years then n is 1

Therefore;

Remaining mass = 100 g × 0.5^1

                            = 50 g

Therefore, 50 g of the isotope will remain after 10 years

#b. Mass of the isotope that will remain after 20 years

Remember the formula;

Remaining mass = Original mass × 0.5^n

n = Time ÷ half life

n = 20 years ÷ 10 years

   = 2

Therefore;

Remaining mass = 100 g × 0.5^2

                           = 25 g

Thus, 25 g of the isotope will be left after 20 years

#3. Number of half lives in 40 years

1 half life = 10 years

But; n = time ÷ half life

          = 40 years ÷ 10 years

          = 4

Thus, the number of half lives in 40 years is 4.

6 0
3 years ago
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