All categories

2 years ago

If a radioactive decay produced 1.26 × 1012 J of energy, how much mass was lost in the reaction?

Chemistry

1 answer:

Ket [755]2 years ago

8 0

The mass lost in the process is 1.4 * 10^-5Kg.

<h3>What is the Einstein equation?</h3>

The Einstein equation is able to relate the mass lost to the energy that is evolved in a nuclear process.

Given that;

E = Δmc^2

Δm = E/c^2

Δm = 1.26 × 10^12 J/( 3 * 10^8)^2

Δm = 1.4 * 10^-5Kg

Learn more about Einstein equation:brainly.com/question/10809666

#SPJ1

You might be interested in

Which of the following is a substance that is found between the cell membrane and the nucleus, which primarily consists of water

VladimirAG [237]

The answer is B, cytoplasm

3 0

4 years ago

Read 2 more answers

Laws differ from theories because laws do NOT provide what

max2010maxim [7]

Answer:

C. An Explanation

Explanation:

5 0

4 years ago

Please help with this chemistry question, image attached.

Alexeev081 [22]

Answer:

a. Sally did not take account the atoms of the compounds, because she only summed Al + O and in the oxide, we have 2 mol of Al and 3 mol of O

b. The conversion factor that Jacob did, was wrong.

Moles must be divided by moles, so they can be cancelled. The correct conversion factor is:

9.45 mol . 102 g / 1 mol = 963.9 g

Explanation:

Al₂O₃ → Aluminum oxide

We determine the molar mass:

Molar mass Al . 2 + Molar mass O . 3

27 g/mol . 2 + 16 g/mol . 3 = 102 g/mol

a. Sally did not take account the atoms of the compounds, because she only summed Al + O and in the oxide, we have 2 mol of Al and 3 mol of O

b. The conversion factor that Jacob did, was wrong.

Moles must be divided by moles, so they can be cancelled. The correct conversion factor is:

9.45 mol . 102 g / 1 mol = 963.9 g

7 0

3 years ago

428. mg of an unknown protein are dissolved in enough solvent to make of solution. The osmotic pressure of this solution is meas

attashe74 [19]

The question is incomplete, here is the complete question:

428. mg of an unknown protein are dissolved in enough solvent to make 5.00 mL of solution. The osmotic pressure of this solution is measured to be 0.0766 atm at 25.0°C. Calculate the molar mass of the protein. Round your answer to 3 significant digits

<u>Answer:</u> The molar mass of protein is $27.3\times 10^3g/mol$

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

$\pi=iMRT$

Or,

$\pi=i\times \frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}\times RT$

where,

$\pi$ = osmotic pressure of the solution = 0.0766 atm

i = Van't hoff factor = 1 (for non-electrolytes)

Mass of solute (protein) = 428 mg = 0.428 g (Conversion factor: 1 g = 1000 mg)

Volume of solution = 5.00 mL

R = Gas constant = $0.0821\text{ L.atm }mol^{-1}K^{-1}$

T = temperature of the solution = $25^oC=[273+25]=298K$

Putting values in above equation, we get:

$0.0766=1\times \frac{0.428\times 1000}{\text{Molar mass of protein}\times 5}\times 0.0821\text{ L. atm }mol^{-1}K^{-1}\times 298K\\\\\text{Molar mass of protein}=\frac{1\times 0.428\times 1000\times 0.0821\times 298}{0.0766\times 5}=27340.4g/mol=27.3\times 10^3g/mol$

Hence, the molar mass of protein is $27.3\times 10^3g/mol$

7 0

4 years ago

Which is the best example of potential energy?

babymother [125]

Answer:

holding a basketball in the air

Explanation:

the ball has potential to have a certain amount of energy but hasn't exerted it yet.

8 0

4 years ago

Read 2 more answers