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3 years ago

Which of the following statements about nuclear reactions is true?

Chemistry

2 answers:

zalisa [80]3 years ago

8 0

<span>They follow the law of conservation of energy only </span>statements about nuclear reactions is true.

Nesterboy [21]3 years ago

5 0

Answer:

They follow the law of conservation of energy only

Explanation:

Nuclear reaction produces large amount of energy. They are of two types --

Fission nuclear reaction

Fusion nuclear reaction

Since energy is associated with nuclear reaction, it must follow universal law of conservation of energy.

Law of conservation states that we cannot create energy from anywhere and also we cannot destroy energy. It can only be transferred from one energy form into another energy form.

In the nuclear reaction, energy is obtained from the collisions of the different atoms such as uranium or helium atom, etc.

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Serial dilution problem: Six test tubes are placed in a rack. To each tube add 4 mL of saline solution. Now to the first tube ad

ArbitrLikvidat [17]

Answer:

The dilution factor of protein in tube # 4 is 125. Molar concentration is 0.0088 M protein

Explanation:

The dilution factor indicates how many times is more concentrated a main solution in relationship with a diluted solution. In this case, the main solution is in tube #1. For calculating the dilution factor and molar concentration in tube #4 we need the main solution concentration which comes from next equation:

Initial volume * initial concentration = final volume * final concentration

0.5 mL * 10M = 5mL * final concentration

1.1 M = final concentration = main solution concentration

Applying the same equation for remain tubes we have 0.22 M for tube #2, 0.044 M for tube # 4 and 0.0088 for tube # 4.

Dilution factor = Main solution concentration/tube 4 concentration

Dilution factor = 1.1/0.0088 = 125

I hope my answer helps you

3 0

3 years ago

An unknown quantity of methane gas, CHA, is held in a 2.00-liter container at 77°C. The pressure inside the container is 3.00 am

kolbaska11 [484]

Answer:

$0.21\text{ mol}$

Explanation:

Here, we want to calculate the number of moles of methane in the container

From the ideal gas law:

$\begin{gathered} PV\text{ = nRT} \\ n\text{ = }\frac{PV}{RT} \end{gathered}$

where:

P is the pressure inside the container which is 3 atm

V is the volume of the container which is 2 L

R is the molar gas constant which is 0.0821 Latm/mol.k

T is the temperature in Kelvin (we convert the temperature in Celsius by adding 273 : 273 + 77 = 350 K)

n is the number of moles that we want to calculate

Substituting the values, we have it that:

$n=\text{ }\frac{3\times2}{0.0821\text{ }\times350}\text{ = 0.21 mol}$

6 0

8 months ago

Which is the formula mass of (NH4)2SO4?

lidiya [134]

Answer:

132.17 amu

ok..... ljkdf

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3 years ago

What type of relationship will mass and added energy have if

valentina_108 [34]

Answer:

This relationship between temperature and pressure is observed for any sample of gas confined to a constant volume. If the temperature increases by a certain factor, the gas pressure increases by the same factor.

7 0

3 years ago

what happens to the density of an object when the volume of that object increases and the mass remains the same?

Dima020 [189]

Answer:

d=m/v If v increases then the density decreases. Denominator get larger

Explanation:

6 0

3 years ago