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sergejj [24]
4 years ago
15

Can you check this for me?

Chemistry
1 answer:
Aliun [14]4 years ago
3 0
Hi, your answer is correct.
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All synthetic elements...
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In chemistry, a synthetic element is a chemical element that does not occur naturally on Earth, and can only be created artificially. So far, 24 synthetic elements have been created (those with atomic numbers 95–118). All are unstable, decaying with half-lives ranging from 15.6 million years to a few hundred microseconds.

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4 years ago
How many atoms doesCo(NO3)2 have
svet-max [94.6K]
The answer is 9. Calcium nitrate is made up
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3 years ago
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A sample of propane, C3Hg, contains 14.4 moles of carbon atoms. How many total moles of atoms does
Leona [35]

Answer:

43.2 mol C

115 mol H

158 mol of atoms

Explanation:

Step 1: Given data

Moles of C₃H₈: 14.4 mol

Step 2: Calculate the number of moles of C

The molar ratio of C₃H₈ to C is 1:3. The moles of C are 3/1 × 14.4 mol = 43.2 mol.

Step 3: Calculate the number of moles of H

The molar ratio of C₃H₈ to H is 1:(. The moles of H are 8/1 × 14.4 mol = 115 mol.

Step 4: Calculate the total number of moles of atoms

n = nC + nH = 43.2 mol + 115 mol = 158 mol

8 0
3 years ago
In a group 1 analysis, a student obtained a precipitate containing both AgCl and PbCh. Which of the following reagents would ena
kakasveta [241]

Answer:

We can separate AgCl and PbCl₂ by adding hot water.

Explanation:

In order to separate group one salts/ions is important to consider their solubility.

PbCl₂ is more soluble in water then AgCl and, when we increase water's temperature, PbCl₂ solubility icireases significantly. However, AgCl solubility does not change considerably.

Therefore, when we add hot water to the solution, the PbCl₂ will be dissolved and AgCl will remain as a precipitate.

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What mass of naturally occurring uranium is closer to 238 u , 235 u or 234 u?
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7 0
4 years ago
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