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vova2212 [387]
2 years ago
11

Who placed all the elements in the right place according to their properties

Chemistry
1 answer:
REY [17]2 years ago
8 0
Dmitri Mendeleev Was the name of the guy you where looking for
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Please help!! Balancing Nuclear Equations
sineoko [7]

The missing part of the equation is found to be 4/2He. Option A

<h3>What are nuclear equations?</h3>

The term nuclear equations have to do with the type of equation in which one type of nucleus is transformed into another sometimes by the bombardment or loss of a particle.

Now the full equation ought to be written as 7/3Li + 1/1H -----> 4/2He + 4/2He. This is because the total mass on the left is 8 and the total charge on the left is 4.

Learn more about nuclear equations:brainly.com/question/19752321

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8 0
2 years ago
What is the ratio of effusion rates for the lightest gas, h2, to the heaviest known gas, uf6?
andriy [413]

The ratio of effusion rates for the lightest gas H₂ to the heaviest known gas UF₆ is 13.21 to 1

<h3>What is effusion?</h3>

Effusion is a process by which a gas escapes from its container through a tiny hole into evacuated space.

Rate of effusion ∝ 1/√Ц, (where Ц is molar mass)

Rate H₂ = 1/√ЦH₂

Rate UF₆ = 1/√ЦUF₆

Therefore, Rate H₂/ Rate UF₆ = √ЦH₂/√ЦUF₆

ЦH₂= 2.016 g/mol

ЦUF₆= 352.04 g/mol

Rate H₂ / Rate UF₆ = √352.04/√2.016 = 18.76/1.42

Rate H₂ / Rate UF₆ = 13.21

Therefore, H₂ is lower mass than UF₆. Thus H₂ gas will effuse 13 times more faster than UF₆ because the most probable speed of H₂ molecule is higher; therefore, more molecules escapes per unit time.

learn more about effusion rate: brainly.com/question/28371955

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8 0
1 year ago
Oxidation no of carbon in C3H7OH​
mestny [16]

Answer:

-2

Explanation:

7 x 1 - 2 x 1 + 1 x 1 + 3C = 0 (no charge)

6 + 3C = 0

C = -2

6 0
3 years ago
Which of these laboratory techniques is best to separate a solid from a liquid to recover the liquid? f chromatography g filteri
galina1969 [7]
Answer:
            Filtering <span>is best laboratory technique to separate a solid from a liquid to recover the liquid.

Explanation:
                   A solid particles present in liquids can be separated from liquid by utilizing a membrane having pores large enough to allow the liquid molecules to pass through and small enough to stop the solid particles from crossing. 

Example:
              Tea Filters are used to separate Tea from the grounds.

              Kidney is an excellent example of Biological Filter.

              </span><span>Whatman Cellulose Filter Paper used in Chemistry Labs.</span>
3 0
3 years ago
Which of the following is a measurement of an object's mass?
Brilliant_brown [7]

Answer:

10 Kilograms

Explanation:

"millimetres" is a unit of measurement and is used for measuring distances.

"newton" is a unit of weight and is used to represent the weight of an object

:kilograms" is the one used for measuring mass

5 0
3 years ago
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