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STatiana [176]
3 years ago
9

"which of these nitrogen compounds is in the most reduced state?"

Chemistry
1 answer:
gtnhenbr [62]3 years ago
8 0
Because I can't see your options, all I can say is to look for the one whose numbers can't be simplified any further
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The half-life of a certain element is 100 days. How many half-lives will it be before only one-eighth of this element remains?
Alexus [3.1K]
After 1 half life its half the element
after 2 hl its quarter remaining
after 3 hl its half the quarter which is 1 eighth
after 3 half lifes
6 0
3 years ago
The half-life for the radioactive decay of calcium-47 is 4.5 days. how many half-lives have elapsed after 27 days?
Evgesh-ka [11]
1 half-life      - 4.5 days
x half-lives   - 27 days

x=(1*27)/4.5=6
6 <span>half-lives have elapsed after 27 days.</span>
8 0
3 years ago
Read 2 more answers
I’ve gotten the answer as x=.478 but when plugging back in, .46/.478 ≠ .22. Help please
ivanzaharov [21]

Answer:

15. 2.66 moles .

16. 2.09L.

Explanation:

Molarity of a solution is simply defined as the mole of solute per unit litre of the solvent. Mathematically, it is represented as:

Molarity = mole /Volume.

With the above formula, let us answer the questions given above

15. Data obtained from the question include the following:

Volume of solution = 1.4L

Molarity = 1.9M

Mole of solute =.?

Molarity = mole /Volume

1.9 = mole / 1.4

Cross multiply

Mole = 1.9 x 1.4

Mole = 2.66 moles

Therefore, the mole of the solute present in the solution is 2.66 moles.

16. Data obtained from the question include the following:

Mole of solute = 0.46 mole

Molarity = 0.22M

Volume of solvent (water) =.?

Molarity = mole /Volume

0.22 = 0.46/Volume

Cross multiply

0.22 x Volume = 0.46

Divide both side 0.22

Volume = 0.46/0.22

Volume = 2.09L

Therefore, 2.09L of water is required.

6 0
3 years ago
299792458 m/s in scientific notation
erastova [34]
2.998e^8 is how I would write it. If you want it with the least amount of decimals, use 3e^8
6 0
3 years ago
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Made up of the protons and neutrons, this part or the atom contains nearly all the mass of the atom
Sonja [21]

Answer:

The nucleus

Explanation:

3 0
3 years ago
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