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Nezavi [6.7K]
2 years ago
14

Can someone help me with this

Chemistry
1 answer:
Feliz [49]2 years ago
3 0

Answer:

phosphorous- 5

calcium- 2

nitrogen- 3 or 5

iron- 8 (transition metals use subshells as valence electrons)

argon- 8

potassium- 1

helium- 2

magnesium- 2

sulfur- 6

lithium- 1

iodine- 7

oxygen- 6

barium- 2

aluminum- 3

hydrogen- 1

xenon- 8

copper- 1

Source: my own chemistry notes

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Which statement explains the energy term in this reaction
lana66690 [7]

Answer:

Mass is lost due to the conversion of mass to energy

Explanation:

The question is not complete, the complete question is given as:

        ^{235}_{72}U +^{1}_{0}n                       ⇒        ^{140}_{56}Ba+^{93}_{36}Kr+3^{1}_{0}n+energy

total mass equals 236.053 u              total mass equals 235.868 u

Which statement explains the energy term in this reaction? (1) Mass is gained due to the conversion of mass to energy. (2) Mass is gained due to the conversion of energy to mass. (3) Mass is lost due to the conversion of mass to energy. (4) Mass is lost due to the conversion of energy to mass.

Answer: From Einstein’s equation  E = mc², when a radioisotope element undergoes fission or fusion in a nuclear reaction, it loses a tiny amount of mass.This mass lost is converted to energy.

The law of conservation of energy  holds for this type of reaction (i.e  the sum of mass and energy is remains the same in a nuclear reaction). Mass changes to energy, but the total amount of mass and energy combined remains the same before and after a nuclear reaction.

From the reaction above, the total decrease in mass = 236.053 - 235.868 = 0.185 u

4 0
2 years ago
Which of the following will increase the rate of disolving?
Fantom [35]

Answer:

I have no idea bro

Explanation:

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3 0
3 years ago
Identify the for of energy<br><br> (A)thermal<br> (B)kinetic<br> (C)chemical<br> (D)electrical
RoseWind [281]

Answer:

<u>C Chemical Energy</u>

Explanation:

food gives us chemical energy which may be transformed to other later..

<em><u>please mark me brainliest</u></em>

3 0
3 years ago
Read 2 more answers
Which are components of cell theory? Check all that apply.
STatiana [176]

Answer:

All living things are made up of cells.

cells are the basic unit of structure and function of ll living things.

All cells are come from other cells.

Explanation:

The cell theory is historic scientific theory and is universally accepted. This theory was given by Robert Hook in 1665. According to this theory all living things are made up cells.

Cell:

Cell is the smallest unit of life and it is building block of life.

This theory consist of following points:

All living things are made up of cells.

Cells are the basic unit of structure and function of ll living things.

All cells are come from other cells. Which means that cells are originated from pre-existing cells.

The other given options:

Cells comes from nonliving matter.

Cells make up most organisms bu not all.

These are two are not the postulate of cell theory because all living organisms are made of cells.

8 0
3 years ago
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Classify the following alcohol as primary,
Nata [24]

The classification of the alcohols gives;

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  • Compound 2 - Tertiary alcohol
  • Compound 3 - Secondary alcohol
  • Compound 4 - Secondary alcohol

<h3>What are alcohols?</h3>

Organic compounds occurs in families. The family of compounds is called a homologous series. The homologous series always have a functional group. The functional group is the atom, group of atoms or bond that is responsible for the chemical reactivity of the members of a given homologous series.

Now we know that the alcohols are those organic compounds that contains the -OH group. The could be aliphatic or alicyclic compounds. We shall now proceed to name the kind of alcohols that each of the compounds shown are;

  • Compound 1 - Primary alcohol
  • Compound 2 - Tertiary alcohol
  • Compound 3 - Secondary alcohol
  • Compound 4 - Secondary alcohol

Learn ore about alcohols:brainly.com/question/4698220

#SPJ1

3 0
1 year ago
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