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Nina [5.8K]
3 years ago
14

Please help me with this question. Thank you.

Chemistry
2 answers:
DedPeter [7]3 years ago
6 0
36∨Kr^95 should be your answer.
krek1111 [17]3 years ago
3 0
In this nuclear reaction, a neutron is used to catalyze the decay of U-235. Four products were produced: Ba-139, two neutrons, and an unknown element X.

To calculate this, you must know that what you start with should be what you end with. The reaction occurred with 236 atomic mass units (U-235 and one neutron), so the final products should add up to 236.

Taking away Barium and the two neutrons:
236-141 = 95.
Now, we know that the element will have an overall mass of 95.

The number of protons should have stayed the same through the reaction as well, since the element didn’t undergo Beta or Positron decay. Starting with 92 protons (92 U), and subtracting the 56 contained in the Barium atom, the final number is 36 protons - the atomic number for Krypton.

Element X is Kr-95.
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Answer: D) 2.37°C

Explanation:

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3 0
2 years ago
The mole ratio of two reactants in a chemical equation is determined by
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Answer:

A mole ratio is the ratio between the amounts in moles of any two compounds involved in a chemical reaction. ... The mole ratio may be determined by examining the coefficients in front of formulas in a balanced chemical equation. Also known as: The mole ratio is also called the mole-to-mole ratio.

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2 years ago
Why is granite better then marble for a statue in a city centre
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5 0
3 years ago
Read 2 more answers
Collected data consists of:
san4es73 [151]

The number of moles of the magnesium (mg) is 0.00067 mol.

The number of moles of hydrogen gas is 0.0008 mol.

The volume of 1 more hydrogen gas (mL) at STP is 22.4 L.

<h3>Number of moles of the magnesium (mg)</h3>

The number of moles of the magnesium (mg) is calculated as follows;

number of moles = reacting mass / molar mass

molar mass of magnesium (mg) = 24 g/mol

number of moles = 0.016 g / 24 g/mol = 0.00067 mol.

<h3>Number of moles of hydrogen gas</h3>

PV = nRT

n = PV/RT

Apply Boyle's law to determine the change in volume.

P1V1 = P2V2

V2 = (P1V1)/P2

V2 = (101.39 x 146)/(116.54)

V2 = 127.02 mL

Now determine the number of moles using the following value of ideal constant.

R = 8.314 LkPa/mol.K

n = (15.15 kPa x 0.127 L)/(8.314 x 290.95)

n = 0.0008

<h3>Volume of 1 mole of hydrogen gas at STP</h3>

V = nRT/P

V = (1 x 8.314 x 273) / (101.325)

V = 22.4 L

Learn more about number of moles here: brainly.com/question/13314627

#SPJ1

7 0
1 year ago
Hello guys can you help me on this.​
RideAnS [48]

Answer:

1.Sulfur dioxide and nitrogen oxide

2.a)it forms carbonic acid

b)

3.the community can use renewable energy like solar and wind power cause they produce less pollution

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