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4 years ago

What does Einstein's famous equation for nuclear energy, E = mc², mean?

Chemistry

1 answer:

Hunter-Best [27]4 years ago

7 0

mass and energy equivalence

Explanation:

Einstein's famous equation suggests that mass and energy are equivalent to one another.

This equation is mostly applicable in nuclear reactions in which mass is lost as energy.

E = mc²

E is the energy

m is the mass

c is the speed of light

The more the mass, the more the energy produced. In nuclear reactions, mass is converted to energy.

Learn more:

Nuclear reactions brainly.com/question/4207569

#learnwithBrainly

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Ice melts into water. The correct equation to calculate the heat of this reaction is...

mr_godi [17]

Answer:

q=mAHf

Explanation:

When water change form from solid(ice) to liquid, it will need heat that depends on the heat of fusion(Hfus). If the form changed from liquid to gas it will use the heat of vaporization(Hvap) instead. The heat of fusion usually written just AT

q=MCAT is used to calculate heat when temperature change(AT = delta T= difference in temperature)

q=mAHvap is wrong because you need if the form change from liquid to gas

q=mc^2 is wrong because it describes the relation of mass and energy, not the form.

The answer should be q=mAHf

6 0

3 years ago

The thermal decomposition of N2O5 obeys first-order kinetics. At 45°C, a plot of ln[N2O5] versus t gives a slope of −6.40 × 10−4

finlep [7]

Answer:

1,080 min

Explanation:

A first order reaction follows the law:

$rate=k[A]$ , where [A] is the concentraion of the reactant A.

Equivalently:

$\dfrac{d[A]}{dt}=-k[A]$

Integrating:

$\dfrac{d[A]}{[A]}=-kdt$

$\ln \dfrac{[A]}{[A_o]}=-kt$

Half-life means [A]/[A₀] = 1/2, t = t½:

t½ = ln (2) / k

That means that the half-life is constant.

The slope of the plot of ln [N₂O₅] is -k. Then k is equal to 6.40 × 10⁻⁴ min⁻¹.

Thus, you can calculate t½:

t½ = ln(2) / 6.40 × 10⁻⁴ min⁻¹

t½ = 1,083 min.

Rounding to 3 significant figures, that is 1,080 min.

5 0

3 years ago

Calculate empirical formula 24.5 g nitrogen 70 g oxygen

LenKa [72]

24.5 / 14 = 1.75
70 / 16 = 4.375

4.375 / 1.75 = 2.5

empirical formula = N2O5

3 0

4 years ago

Gallionella bacteria can get energy from the reaction fe2+ → fe3+. this reaction is an example of

Ilya [14]

This is an example of Oxidation

6 0

3 years ago

Shinoda Corp. has 9 percent coupon bonds making annual payments with a YTM of 8.4 percent. The current yield on these bonds is 8

Genrish500 [490]

Answer:

6.33 years

Explanation:

In this question, we determine the NPER or the time period that is shown in the attached spreadsheet

Given that,

Present value = (9% × $1,000) ÷ (8.75%) = $1,028.57

Assuming figure Future value = $1,000

Rate of interest = 8.4%

PMT = $1,000 × 9% = $90

The formula is shown below:

= NPER(Rate;PMT;-PV;FV;type)

The present value come in negative

So, after solving this, the answer would be 6.33 years

6 0

3 years ago