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4 years ago

Why is helium less reactive than hydrogen?

Chemistry

1 answer:

Sergeeva-Olga [200]4 years ago

7 0

Answer:

Explanation:

Helium is a noble gas meaning its valence shell is full. Because this shell is full, helium does not feel the need to react with anything because it is stable. On the other hand, hydrogen's valence shell is only half full, so it need to donate an electron so that it can become more stable.

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The reaction between NO2 and co to produce no and CO2 is thought to occur in two steps:

MAXImum [283]

Answer:

Correct option is

Explanation:

The number of molecules of CO involves in the slowest step will be 0 because CO is not involve in the slowest step i.e. rate determing step.

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3 years ago

What is the speed of a 6-kg bowling ball that has 30 J of kinetic energy?

Katyanochek1 [597]

Answer: 2700J

Explanation:

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3 years ago

Predict the products of hydrobromic acid, H B r , reacting with magnesium hydroxide, M g ( O H ) 2 . Select one or more:

Aliun [14]

Answer:

Magnesium bromide, MgBr2, and water, H2O.

Explanation:

Hello!

In this case, since HBr is an acid and Mg(OH)2 is a base, an acid-base reaction is undergone, by which a salt and water are produced as neutralization products:

$HBr+Mg(OH)_2\rightarrow MgBr_2+H_2O$

However, it need to be balanced since two bromine atoms are produced, therefore we write:

$2HBr+Mg(OH)_2\rightarrow MgBr_2+2H_2O$

Thus, the products are magnesium bromide, MgBr2, and water, H2O.

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3 years ago

Choose all the answers that apply.

kkurt [141]

The very last option!

8 0

4 years ago

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The atom is one of the basic units of matter. Which part of the atom mostly determines the size of the atom?

dedylja [7]

Answer:

Atomic size is the distance from the nucleus to the valence shell where the valence electrons are located. The separation that occurs because electrons have the same charge. The number of protons in the nucleus. The core electrons in an atom interfere with the attraction of the nucleus for the outermost electrons.

Explanation:

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3 years ago

Read 2 more answers