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2 years ago

If Z is the symbol for an element, which pair among the following represents isotopes of the same element?

Chemistry

2 answers:

insens350 [35]2 years ago

5 0

the answer is B. got this correct on the test

anygoal [31]2 years ago

3 0

<span>B. 51 50
Z and Z
25 25

It is because only this element have equal number of Protons (Bottom number) and are different in atomic masses (upper number)

Hope this helps!</span>

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B. It shifts the equilibrium toward the right, favoring product.

PilotLPTM [1.2K]

Answer:

11) the difference in heat energies between products and reactants

12) enthalpy change

Explanation:

The heat of reaction is defined as that energy released or absorbed as chemical substances participate in a chemical reaction. It is a term used to denote the change in energy as reactants change into products.

Another name of heat of reaction is enthalpy of reaction. It is a state function since it depends on the initial and final states of the system.

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3 years ago

1.While cooking, if the bottom of the vessel is getting blackened on the outside.

k0ka [10]

Answer:

Explanation:

The fuel is burning completely

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3 years ago

Is 4 grams of oxygen bigger than 1 mole of oxygen

levacccp [35]

Answer:

No, a mole of oxygen is about 16 grams

Explanation:

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3 years ago

ILL GIVE YOU BRAINLIEST <3

Paha777 [63]

Answer:

Should be a 15 imo

Explanation:

N is one, 4H = 4, S 2 because of the 2 and O 8 because of the 4 and the 2 before the S.

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3 years ago

Arrange the following compounds in decreasing order of acidity from left to right, and explain the reason in less than 90 words.

saveliy_v [14]

Explanation:

More is the electronegativity of atoms attached to the alpha carbon atom more will be the attraction of electron towards it. As a result, release of hydrogen ion will be easier.

Therefore, there will be increased in acidity of the compound.

Since, fluorine, chlorine and bromine are all group 17 elements and fluorine is more reactive than chlorine. On the other hand, chlorine is more reactive than bromine.

Hence, ability to attract the electrons towards itself will be maximum in fluorine and least in bromine.

Therefore, decreasing order of acidity of the given compounds is as follows.

$CF_{3}COOH$ > $CCl_{3}COOH$ > $CBr_{3}COOH$ > $CH_{3}COOH$

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3 years ago