3 years ago

In which part of a chemical reaction do bonds break in which part do they form?

1 answer:

3 0

<span>Chemical bonds are broken down in the reactants while a reaction is occurring. Products are the new chemical bonds that are formed.</span>

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A system gains 652 kJ of heat, resulting in a change in internal energy of the system equal to +241 kJ. How much work is done?

levacccp [35]

Answer:

-411 kj

Explanation:

We solve by using this formula

∆U = ∆Q + ∆W

This formula is the first law of thermodynamics

Change in internal energy U = +241

Heat gained by system Q = 652

Putting the value into the equation

+241 = 652 + W

Workdone = 241 - 652

Workdone = -411 kj

Since work done is negative it means that work was done by the system

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2 years ago

An atom has atomic number of 34. how many protons and electrons does it have? what is its symbol? 34 protons and electrons. se l

AURORKA [14]

Se: Selenium

Protons: 34
Electrons: All atoms in the periodic table are neutral until changed otherwise
Neutrons: 44
Atomic Mass: 78.09

>Symbol attached<

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2 years ago

What is the only nonmetal in group 14?

Fantom [35]

Answer:

The only nonmetal in group 14 is carbon.

Explanation:

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2 years ago

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A gas fills up a container that has 2.5L has a pressure of 3.5 atm. If the gas gets transferred to a container that holds 4L, wh

disa [49]

New pressure = 2.5 x 3.5 / 4 = 2.185 atm

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2 years ago

Draw the Lewis structure, including unshared pairs, of the following molecules. Carbon has four bonds in the compound.

Galina-37 [17]

Explanation:

Refer to attachment.

Propane
Methanol (methyl alcohol)
methyl fluoride
ethyl fluoride

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2 years ago