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kirill115 [55]
3 years ago
7

How many electrons does Helium (He) have?

Chemistry
2 answers:
Bad White [126]3 years ago
6 0
Helium has two electrons. This can be found by looking at the atomic number on the periodic table. Neutral atoms have the same number of protons as electrons.
myrzilka [38]3 years ago
5 0

Answer: 2

Explanation:

Hope this helps! (^-^)

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The density of the hydrocarbon is 2.177 g/L. The gas is collected over water at 40.ºC and the barometric pressure is 776.2 mmHg.
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2 years ago
The Charles Zeppelin, a fictional airship, is filled with 2.16 x 105 liters of hydrogen gas (H2). On the ground, the airship’s t
Dmitry [639]

Answer:

V2 = 3.11 x 105 liters

Explanation:

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These quantities are related by charle's law and the equation of the law is given as;

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2 years ago
80cm^3 of oxygen gas diffused through a porous hole in 50 seconds how long wiil it take 120cm^3 of nitrogen (iv) oxide to diffus
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Answer: it will take 89.93secs

Explanation:Please see attachment for explanation

5 0
3 years ago
What is the percent cr, by mass, in the steel sample? express your answer numerically as a percentage?
djverab [1.8K]
Given:3.40g sample of the steel used to produce 250.0 mLSolution containing Cr2O72−

Assuming all the Cr is contained in the BaCrO4 at the end. 
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8 0
3 years ago
Read 2 more answers
In an isolated system, mass can neither be<br> created or destroyed.<br> ube<br> FALSE<br> TRUE
Marina86 [1]

Answer:

True

Explanation:

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Hope it helps

5 0
3 years ago
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