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2 years ago

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Element R and Element Q have the same number of valence electrons. These elements have similar chemical behavior, but element R

has fewer energy levels than element Q
Describe what their positions on the Periodic Table have in common.

1 answer:

I am Lyosha [343]2 years ago

7 0

Answer:

I dont now because I am in 6 class

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Which of the following is a physical change. A piece of magnesium metal formed bubbles when dropped in acid

uysha [10]

H2O became a vapor when heated because thats the only one that can go back to its normal state, which is what a physical change is.

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2 years ago

Metamorphic rocks that melt in a holt fluid can recystallize into a different form of rock

kotykmax [81]

I think that type of rock is call Igneous rock because the igneous rock is molten rock from volcanoes.

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2 years ago

How do cells get ATP, the energy currency that does work in living things?

luda_lava [24]

How do cells get ATP through Cellular Respiration.
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2 years ago

Are all single bonds sigma bonds?

Nikolay [14]

Single bonds are those that bond with one atom, and sigma bonds are the strongest type of covalent bonds that are single bonded.

That means NO, not all single bonds are sigma bond, but all sigma bonds are single bonds.

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2 years ago

Consider the reaction: HCN (aq) + H2O (l) ⇄ CN- (aq) + H3O + (aq) Which of the following statements will decrease the amount of

alekssr [168]

Answer: Option (b) is the correct answer.

Explanation:

The given chemical reaction shows that hydrogen cyanide acid has been added to water which results in the formation of hydronium ion and cyanide ion.

Also, when we add a base like sodium hydroxide (NaOH) to HCN then it will help in accepting a proton ( $H^{+}$ ) from hydrogen cyanide. As a result, formation of $CN^{-}$ anion will be rapid and easy.

This will make the system not to do any extra work. So, amount of work done by system will decrease.

Thus, we can conclude that out of the given options, add solid NaOH to the reaction (assume no volume change) will decrease the amount of work the system could perform.

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3 years ago