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3 years ago

What type of a reaction takes place when atoms or molecules rearrange to form new substances

Chemistry

2 answers:

GREYUIT [131]3 years ago

6 0

A chemical reaction happens when the atoms or molecules rearrange to form a new substance

zavuch27 [327]3 years ago

4 0

Explanation:

A reaction that bring changes in the chemical composition of its reactants then it is known as chemical reaction.

For example, $C + O_{2} \rightarrow CO_{2}$

When carbon and oxygen combine together then properties of both carbon and oxygen changes. Whereas properties of carbon dioxide is different from carbon and oxygen atom.

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Aquafers are bodies of water found above ground with thriving ecosystems. O True O False

BaLLatris [955]

Answer:

true

Explanation:

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2 years ago

During a combustion reaction, 9.00 grams of oxygen reacted with 3.00 grams of CH4.

Monica [59]

Answer:

0.74 grams of methane

Explanation:

The balanced equation of the combustion reaction of methane with oxygen is:

CH₄ + 2 O₂ → CO₂ + 2 H₂O

it is clear that 1 mol of CH₄ reacts with 2 mol of O₂.

firstly, we need to calculate the number of moles of both

for CH₄:

number of moles = mass / molar mass = (3.00 g) / (16.00 g/mol) = 0.1875 mol.

for O₂:

number of moles = mass / molar mass = (9.00 g) / (32.00 g/mol) = 0.2812 mol.

it is clear that O₂ is the limiting reactant and methane will leftover.

using cross multiplication

1 mol of CH₄ needs → 2 mol of O₂

??? mol of CH₄ needs → 0.2812 mol of O₂

∴ the number of mol of CH₄ needed = (0.2812 * 1) / 2 = 0.1406 mol

so 0.14 mol will react and the remaining CH₄

mol of CH₄ left over = 0.1875 -0.1406 = 0.0469 mol

now we convert moles into grams

mass of CH₄ left over = no. of mol of CH₄ left over * molar mass

= 0.0469 mol * 16 g/mol = 0.7504 g

So, the right choice is 0.74 grams of methane

3 0

2 years ago

What are 3 types of mutations

mote1985 [20]

1- Base substitutions.

2- Deletions.

3- Insertions.

6 0

2 years ago

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Draw the structure of the organic product(s) of the grignard reaction between phosgene (clcocl) and excess phenylmagnesium bromi

Jobisdone [24]

Phosgene on reacting with phenylmagnesium bromide generates benzoyl chloride.

Since, phenylmagnesium bromide is added in excess. It would further react with benzoyl chloride to form benzophenone.

Benzophenone on further reacting with phenylmagnesium bromide, and aqueous treatment, gives triphenylmethanol.

Entire reaction pathways is shown below:

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3 years ago

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All Molecules in a compound are the_____ Please Help I don't know the answer.

jonny [76]

A compound is a molecule that contains at least two different elements. All compounds are molecules but not all molecules are compounds. Molecularhydrogen (H2), molecular oxygen (O2) and molecular nitrogen (N2) are notcompounds because each is composed of a single element.

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3 years ago