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skelet666 [1.2K]
3 years ago
14

Fill in the blanks with the correct words to complete the sentence.

Chemistry
1 answer:
navik [9.2K]3 years ago
4 0

Answer:

Explanation:

Salt water intrusion can cause the <u><em>fresh</em></u> water in wells to become contaminated with<u><em> salt</em></u>water.

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arlik [135]

Answer:

1: C5H12

2:C5H11

Explanation:

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4 0
2 years ago
How many half-lives would something have gone through if you had 75% daughter product and 25% parent?
levacccp [35]

Answer:

Two Half-lives

Explanation:

Let number of Parent nuclei Initially present be X,

Then, finally \frac{X}{4} Parent nuclei Will remain with \frac{3X}{4} daughter nuclei.

In one half- life , parent nuclei becomes half of initial.

So, starting with X parent nuclei,

After one half-life, it will degrade to \frac{X}{2} .

After another half life , Parent nuclei will become half of \frac{X}{2}

Which is equal to \frac{X}{4}.

So, Parent nuclei have to go through Two half-lives.

6 0
3 years ago
1. A 205 g sample of H20 at 25.0 °C is heated until the temperature reaches 75.0 °C. How many
Pachacha [2.7K]

Answer:

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Explanation:

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7 0
3 years ago
Extra Stoichiometry Practice
Irina-Kira [14]

Answer: 50. 4g

Explanation:

First calculate number of moles of aluminium in 38.8g

Moles = 38.8g/ 26.982mol/g

= 1.44mol

By looking at the balance equation you can see that 4 moles of aluminium produce 2 moles of aluminium oxide.

4 = 2

1.4 = x

Find the value of x

x= (1.4×2)/4= 0.72 mol

0.72 moles of aluminium oxide are produced from 38.8g of aluminium

Now find the mass of aluminium produced.

Mass = moles × molar mass

= 0.72mol × 69.93 mol/g

= 50.4g

8 0
2 years ago
How would you figure the number of protons or electrons in an atom
TiliK225 [7]
The number of protons in an atom can be determined by the element's atomic number, and the number of electrons can be determined by subtracting by atomic mass by the atomic number.
8 0
3 years ago
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