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Illusion [34]
4 years ago
12

Please help as soon as possible

Chemistry
1 answer:
polet [3.4K]4 years ago
6 0

Answer:

A. 2.4 x 10¹⁴ J

Explanation:

m (mass) = 2.7 x 10⁻³ kg

c = 3.0 x 10⁸ m/s

Plug these numbers into the equation E=mc²

E=mc²

E= (2.7 x 10⁻³)(3.0 x 10⁸)²

E= 2.43 x 10¹⁴

So, the answer is A. 2.4 x 10¹⁴ J.

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ivolga24 [154]

Answer:

electric energy ---> heat energy or A.

Explanation:

the name says it all

3 0
3 years ago
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A chemist requires 0.802 mol Na2CO3 for a reaction. How many grams does this correspond to?
Komok [63]

Answer:

Ok:

Explanation:

So grams = mols*MolarMass. Here, MolarMass (MM) = 105.99g which can be found using the periodic table. mols is given to be 0.802. We can then plug in to get that it corresponds to 85.0g.

7 0
3 years ago
Help on science please !!
NemiM [27]

Answer:

a. Kenya's growth seems to be a large population influx, an increase in the pre-reproductive stage.

b. There is a decrease in the younger generation, meaning that the reproductive part of the population is more than the pre-reproductive part. Which means less of an incline in population.

c. You can see the differences within the countries, that the growth rate in Kenya is extremely high, the United States more moderate, while Germany is somewhat even throughout. Germany is not growing much in comparison to Kenya.

6 0
3 years ago
Question 1<br> 1 pts<br> How many mols of bromine are present in 35.7g of<br> Tin(IV) bromate?
sleet_krkn [62]

Answer:

n = 0.0814 mol

Explanation:

Given mass, m = 35.7g

The molar mass of Tin(IV) bromate, M = 438.33 g/mol

We need to find the number of moles of bromine. We know that,

No. of moles = given mass/molar mass

So,

n=\dfrac{35.7}{438.33}\\\\n=0.0814\ mol

So, there are 0.0814 moles of bromine in 35.7g of  Tin(IV) bromate.

3 0
3 years ago
Of the elements: b, c, f, li, and na. the element with the smallest ionization energy is
love history [14]
B-  8.2980
C-  11.2603
F-  17.4228
Li-  5.3917
Na- 5.1391

I would say your answer is Na.
8 0
3 years ago
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