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AysviL [449]
3 years ago
8

An experiment was conducted with a 1.57 gram starting mass of copper. How many grams of cooper were collected if the yield was 8

0.6%? Report your answer with three significant figures.
Chemistry
1 answer:
IRINA_888 [86]3 years ago
7 0

Answer:

1.26 g of Cu

Explanation:

Since we have to find the percentage of the given amount so...

Yield in grams = (Initial mass used / 100) x Percentage Yield

Yield in grams = (1.57 / 100) x 80.6 = 1.26 g of Cu

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Provide the atomic mass an ion contains 16 protons,17 neutrons and 18 electrons​
Rasek [7]

Answer:

37

Explanation:

Atomic mass is the sum of protons and neutrons in an atom.

5 0
3 years ago
When copper ii chloride reacts with sodium nitrate copper ii nitrate and sodium chloride are formed?
Nesterboy [21]
The balanced chemical reaction would be written as follows:

CuCl2 + 2NaNO3 = Cu(NO3)2 + 2NaCl

This is an example of a double displacement type of reaction where the ions of the reactants displaces each other forming two new substances. Hope this answers the question.
5 0
3 years ago
19. Sunrise is at 7:33 in Greenwich and at local sunrise converted to GMT is at 14:31 a.m.
Akimi4 [234]

Answer:

Earlier, since the sun comes out first from east to west, and Nevada is east of California, it would be earlier.

Explanation

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3 0
3 years ago
If one contraction cycle in muscle requires 55 kJ55 kJ , and the energy from the combustion of glucose is converted with an effi
Juliette [100K]

Answer:

18 moles

Explanation:

Here the combustion of one mole of glucose ----> carbon dioxide + water, releases 2870 kilojoules / moles.

_______________________________________________________

With one contraction cycle requiring 55 kilojoules,

2870 / 55 ≈ 52.18

And with the efficiency being 35 percent,

52.1818..... * 0.35 = ( About ) 18 moles

<u><em>Hope that helps!</em></u>

3 0
3 years ago
What is the mass of 1.25 moles of Na2O?​
olga_2 [115]

Answer:

Explanation:

I have the same question

4 0
4 years ago
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