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4 years ago

Which of the following statements about nuclear reactions is true?

Chemistry

1 answer:

Anit [1.1K]4 years ago

3 0

Answer: They follow Einstein's equation, which allows for the conversion of mass to energy.

The statement that is true about nuclear reactions is that they follow Einsteins equation which allows the conversion of mass to energy.

Explanation:

Einstein’s mass-energy equation gives the idea that energy and mass are two inter-convertible forms of the same thing. This equation clearly answers the question about the large amount of energy produced by produced in nuclear reaction even though they don’t involve very heavy atoms. It is given by

$E=mc^2$

Energy released by a mass is equal to mass times the square of speed of light c. 

Value of speed of light $c=3 \times 10^8 .$ 

 $c^2=9 \times 10^1^6$ which is a large value.

Thus high amount of energy can be produced by even a small mass. It is the mass of the reacting species in a nuclear reaction that gets converted to energy and the sum of mass and energy in the overall reaction is always conserved. 

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Convert each of the measurements given to the new unit stated using the factor label method (dimensional analysis). Show all wor

KengaRu [80]

For cm to m, you need to divide by 100 to get m:
26cm/100= 0.26m

For hr to min, you need to multiply by 60 to get min:
4hr x 60= 240min

For km to m, you need to multiply by 1000 to get m:
3.25km x 1000= 3250m

For ft to in, you need to multiply by 12 to get in:
5ft x 12=60in

So we have:
0.26m
240min
3250m
60in

6 0

3 years ago

A chemical engineer has determined by measurements that there are 69.0 moles of hydrogen in a sample of methyl tert-butyl ether.

Juli2301 [7.4K]

5.75 moles The formula for methyl tert-butyl ether is (CH3)3COCH3, so a single molecule has 5 carbon, 12 hydrogen, and 1 oxygen atoms. So for every 12 moles of hydrogen, there's 1 mole of oxygen. So simply divide the number of moles of hydrogen by 12 to get the number of moles of oxygen. 69.0 / 12 = 5.75 Therefore there's 5.75 moles of oxygen in the sample.

3 0

3 years ago

If the concentration of the stock (provided) Cu(NH3)42 was 0.041 M, what concentration will the Cu2 be in beaker?

kodGreya [7K]

Answer:

$[Cu^{2+}]=0.041 M$

Explanation:

Hello!

In this case, since the molarity of a solution is defined in terms of the moles of the solute and the volume of solution, given that the concentration of Cu(NH₃)₄²⁺ is 0.041 M, and there is only one copper atom per Cu(NH₃)₄²⁺ ion, we can compute the concentration of Cu²⁺ as shown below:

$[Cu^{2+}]=0.041\frac{molCu(NH_3)_4^{2+}}{L}*\frac{1molCu^{2+}}{1molCu(NH_3)_4^{2+}} =0.041 \frac{molCu(NH_3)_4^{2+}}{L}$

$[Cu^{2+}]=0.041 M$

Best regards!

6 0

3 years ago

What is the answer?

Naily [24]

Answer:

Option A

Explanation:

The atomic number is the number of protons in the nucleus of an atom.

3 0

3 years ago

Where do mutations occur?

shepuryov [24]

Answer:

in the cell during mitosis or during meiosis

Explanation:

3 0

3 years ago

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