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katrin [286]
3 years ago
5

In a piece of metal, what holds the atoms together?

Chemistry
2 answers:
Aleks [24]3 years ago
8 0

Answer:

c

Explanation:

the positive charges of the nuclear and the negative charges of delocalized electrons

lisabon 2012 [21]3 years ago
7 0

Answer:

C

Explanation:

the positive charges of the nuclei and the negative charges of delocalized electrons

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The second step to the scientific method is to state the "problem", the scientific question to be solved. What is one requiremen
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The answer is B. In order to test something out you need to be able to solve it.
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In the preparation of a certain alkyl halide, 10 g of sodium bromide (NaBr), 10 mL distilled water (H20), and 9 mL 3-methyl-1-bu
Novosadov [1.4K]

Percentage yield shows the amount of reactants converted into products. The percentage yield of the reaction is 51.7%.

The equation of the reaction is sown in the image attached. The reaction is 1:1 as we can see.

Number of moles of NaBr = 10 g/103 g/mol = 0.097 moles

We can obtain the mass of 3-methyl-1-butanol from its density.

Mass = density × volume

Density of 3-methyl-1-butanol =  0.810 g/mL

Volume of  3-methyl-1-butanol = 9 mL

Mass of 3-methyl-1-butanol = 0.810 g/mL × 9 mL

Mass of 3-methyl-1-butanol = 7.29 g

Number of moles of 3-methyl-1-butanol =  mass/molar mass =  7.29 g/88 g/mol = 0.083 moles

Since the reaction is 1:1 then the limiting reagent is 3-methyl-1-butanol

Mass of product 1-bromo-3-methylbutane = number of moles × molar mass

Molar mass of 1-bromo-3-methylbutane = 151 g/mol

Mass of product 1-bromo-3-methylbutane = 0.083 moles × 151 g/mol

= 12.53 g

Recall that % yield = actual yield/theoretical yield × 100

Actual yield of product = 6.48 g

Theoretical yield = 12.53 g

% yield = 6.48 g/12.53 g × 100

% yield = 51.7%

Learn more: brainly.com/question/5325004

7 0
2 years ago
What are the conditions for evaporation?
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Short Answer- Hot and humid temperature, lots of wind speed.

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What happens when cells are exposed to radioactivity?
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when cell is exposed to radiation we get brain tumour or cancer.

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Compared to other stars we observe, the Sun appears bigger and brighter because:
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Answer:

Compared to other stars we observe, the Sun appears bigger and brighter because it is much closer to earth.

Objects closer to earth appear to be much bigger and brighter.

Let me know if this helps!

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