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4 years ago

QUICK!

Chemistry

2 answers:

forsale [732]4 years ago

5 0

I think it can be A or D Hope this helps.

Darya [45]4 years ago

4 0

A, all the others are incorrect

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Only 235u can be used as fuel in a nuclear reactor, so uranium for use in the nuclear industry must be enriched in this isotope.

Yuki888 [10]

There are two isotopes of uranium abundant in nature

U235 and U238

As given that the sample has average molar mass of 237.482 amu

Let the amount of U235 in 100g sample = x

the amount of U238 in 100 g sample = 100-x

the average molar mass = [235(x) + 238 (100-x)] / 100

237.482 = [235(x) + 238 (100-x)] / 100

237.482 X 100 = [235(x) + 238 (100-x)]

23748.2 = 235 x + 23800 - 238x

51.8 = 3x

x = 17.27 g

So percentage of U-235 = 17.27 %

3 0

3 years ago

How many electrons does an ion of magnesium have if it’s represented by the symbol shown below? 25Mg2+

Galina-37 [17]

Answer:

10 electrons.

Explanation:

Hello!

In this case, since a normal atom of magnesium has 12 protons and electrons when is not in the form of a cation, since it is a metal that tends to lose electrons when ionized, and therefore it becomes positively charged, we infer that in form of:

$Mg^{2+}$

It only has 10 electrons.

Best regards!

7 0

3 years ago

A reaction mixture is at equilibrium. What happens when the amount of one of the reactants is increased?

NikAS [45]

Answer:

the amount of the product also increases

Explanation:

le chatelier principle

A + B ↔️ C + D

if you add A for example ( a reactants )

B will decrease

C and D will increases

7 0

3 years ago

What energy resource doesnt pollute when used

lyudmila [28]

Electricity from renewable resources such as solar, geothermal, and wind generally does not contribute to climate change or local air pollution since no fuels are combusted.

6 0

3 years ago

Suppose you have a sample of table salt (NaCl) that has a mass of 100.0 grams. If

IgorC [24]

Taking into account the definition of molarity, the concentration of the solution is 0.855 $\frac{moles}{liter}$ .

<h3>Definition of molarity</h3>

Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.

The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:

$Molarity=\frac{number of moles}{volume}$