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tester [92]
2 years ago
7

What is the SI unit for energy? How is it abbreviated?

Chemistry
1 answer:
hjlf2 years ago
3 0

Answer:

Joule - J

Explanation:

As energy is defined via work, the SI unit of energy is the same as the unit of work – the joule (J).

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Element X is in group 2, and element Y is in group 7, of the periodic table. which ions will be present in the compound formed w
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Answer:

Element X has valency 2 while Y Valency 2, element Y has high tendency of gaining electrons for its stability thus the compound formed will be B

elements X is positively charged while Y will be negatively charged

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2 years ago
What is limiting about a liquid Mercury thermometer?
ella [17]
There are non-mercury thermometers with temperature and accuracy rangers equal to most mercury thermometers.
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3 years ago
How many atoms of hydrogen are in 0.500 mol of ch3oh molecules?
cestrela7 [59]
In 1 mol of CH3OH, you have 4 H-atoms (because 3 H-atoms are attached to the C-atom, and one H-atom in the OH group). That means in 0.500 mol of CH3OH, you have 2 H-atoms since it is halved. And then we have Avogadro's constant: 6.02 * 1023.

The question asks for how many hydrogen atoms there are in 0.500 mol CH3OH. Using the numbers that we have (Avogadro's constant and no. of H-atoms), the answer of the question will be something like:

<span>H-atoms in CH3OH = 2 * 6.02 * </span>1023<span> = ~1.2 * 10</span>24

 


8 0
3 years ago
The mass of an electron is about 9.11 × 10 -9 kg., write this whole number​
Pepsi [2]

Answer:0.00000009

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According to the Periodic Table of Elements, Calcium has:
lana [24]

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20 protons and 20 electrons

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3 0
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