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natka813 [3]
3 years ago
11

Equation: 2Mg + O2 = 2MgO

Chemistry
1 answer:
Lena [83]3 years ago
8 0
B would be your answer
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How many calories are absorbed in a process that absorbs 0.128 joules?
earnstyle [38]

Answer:

There are 0.0305 calories in 0.128 joules

Explanation:

Given that,

Heat absorbed, Q = 0.128 J

We need to find the heat energy absorbed in calories.

We know that the relation between joules and calories is as follows :

1 calorie = 4.184 J

1 J = (1/4.184) J

So,

0.128\ J=\dfrac{0.128 }{4.184}\\\\=0.0305\ cal

So, there are 0.0305 calories in 0.128 joules

7 0
3 years ago
An atom has 34 protons in its nucleus. It is an atom of which element
tia_tia [17]
The answer is Selenium.

Hope that helps.
8 0
3 years ago
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Which is an example of chemical weathering?
kobusy [5.1K]

Answer:

b. the layer of oxide formed on statues made of metal

Explanation:

Chemical weathering is a process whereby rocks are disintegrated or weathered causing a chemical reaction thereby leading to change in the parent rock constituents .

In chemical weathering a new substance is usually formed after the weathering takes place.

From the question the layer of statue made by metal will likely form oxides of those metals. Example Silver will react with oxygen to form an entirely new substance like silver(i)oxide.

7 0
3 years ago
I NEED UR HELPPPP I HAVE TO SUBMIT IT IN 10 MINS!!!! PLEASE I HAVE NO IDEA
Vilka [71]

Explanation:

6/t1=4/293= 1750/4 =439.5-273=166.5

4 0
3 years ago
1. What is the kinetic energy of 44 kg cheetah running at 31m/s speed?
Vanyuwa [196]

Explanation:

Given

mass (m) = 44 kg

velocity (v) = 31 m/s

Now

Kinetic energy

= 1/2 mv²

= 1/2 * 44 * 31²

= 0.5 * 44 * 961

= 21142 joule

Hope it will help you :)

3 0
3 years ago
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