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Gemiola [76]
3 years ago
8

Directions: Find the scale for and volume shown in each graduated cylinder. You should estimate the final place.

Chemistry
1 answer:
Murljashka [212]3 years ago
4 0
A,b, b, because I got the correct answer in class too
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A rock is found to contain 2.2 grams of uranium-235, a radioactive isotope. If the rock has undergone 2.75 half-lives, what was
Verizon [17]

Answer:

=14.8 grams

Explanation:

The remaining amount is normally calculated using the formula:

Remaining mass= 1/2ⁿ × Original mass where n is the number of half-lives.

Therefore, original mass= Remaining mass × 2ⁿ

Remaining mass= 2.2 grams

Number of half lives= 2.75 half lives

Original mass= 2.2g × 2²·⁷⁵

=14.8 grams

3 0
3 years ago
Using only the groups of the periodic table, choose one element that is chemically similar to each of the following elements.
zhenek [66]
Elements that are in the same columns (vertical) are chemically similar.

Carbon- Si
Cesium- Na
Krypton- Ar
Magnesium- Ca
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These are just the ones I picked but it could be any in the same column
4 0
3 years ago
Why is copper used in the manufacture of computers?
Stells [14]

IBM and others are using copper instead of aluminum in the most powerful computer chips they manufacture. Because of copper's superior electrical conductivity, this technology enables conductor channel lengths and widths to be significantly reduced.

3 0
3 years ago
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Carl crumbled a piece of paper before throwing it in the trash can. Which is true about the paper after it has been crumbled
tiny-mole [99]
Answer is <span>C: It's appearance changed.</span>
4 0
3 years ago
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victus00 [196]

Answer:

This isotope has 59 electrons giving it a charge of -2.

Explanation:

To find this we have to understand isotope relates to the mass of the nucleus. This isotope has 59 electrons to counter the protons and give it a negative charge.

6 0
2 years ago
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