All categories

3 years ago

What must happen before a chemical reaction can begin?

Biology

2 answers:

Free_Kalibri [48]3 years ago

6 0

Before a chemical reaction can start energy must be absorbed by the reactants. The amount that must be absorbed to start the reaction is called the activation energy. you're right, t<span>he activation energy must be reached.</span>

Alik [6]3 years ago

4 0

Answer:

The correct answer is that the activation energy must be reached.

Explanation:

In order to start a chemical reaction, energy is needed. A certain amount of energy is needed in order to get started. This energy is termed as activation energy. A reaction would not take place unless the molecules or atoms of reactants come together. This takes place only when the particles are in motion, and for motion, energy is required.

The reactants have to overcome forces, which push them away from each other, and the bonds present in the reactants are needed to get dissociated, for both these purpose energy is required. Thus, before the beginning of a chemical reaction, the activation energy must be reached.

You might be interested in

2. How could one change in a DNA nucleotide alter the formation of the translated protein

vichka [17]

Answer AND Explanation:

Proteins are formed from the translation of mRNA to amino acid. Each set of 3 nucleotides make up a codon that codes for a specific amino acid. Frameshift mutations can also impact the formation of the protein. A change in a nucleotide does not always change the amino acid or protein because some amino acids have more than one set of 3 nucleotides that code for them. Valine, for example, is coded for by GUU, GUC, GUA and GUG. A change in the last nucleotide wouldn't affect the amino acid formed. However,GAG codes for glutamic acid.

6 0

3 years ago

What are some human activities that change the environment?

Aleksandr-060686 [28]

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water

Other answers:

Overpopulation.

Pollution.

Global Warming.

Climate Change.

Genetic Modification.

Ocean Acidification.

Water Pollution.

Deforestation.

7 0

2 years ago

Read 2 more answers

Easy 10 points , just match up the vocab.

saw5 [17]

<span>1. is exothermic
2. is current electricity
3. is static electricity
4. is outer ear
5. is compression</span>

5 0

3 years ago

If a male dog has 20 chromosomes in his sperm cell, how many does he have in his body cell?

LUCKY_DIMON [66]

40 a body cell has twice the number of chromosomes than in a gamete

4 0

3 years ago

1. 1 Water makes up between 70-90% of the weight of most life forms, and nearly all chemicals present in living matter are solub

boyakko [2]

Answer:

The correct model is D.

Note: The first attachment below shows the different models. The second attachment shows the correct structural model of the water molecule.

Explanation:

A water molecule is composed of one atom of oxygen and two atoms of hydrogen.

A water molecule is polar, i.e. it contains positively and negatively opposite ends. The polar nature of the water molecule is due to strong electronegativity of oxygen which results in an uneven sharing of the bonding electrons between oxygen and hydrogen. The oxygen atom attracts the shared electrons more to itself, thereby, it acquires a partial negative charge, while the hydrogen atoms acquire a partial positive charge.

The bond angle between the oxygen and hydrogen atoms is approximately 105°. Therefore, from the first attachment below, the correct model for the water molecule is D.

4 0

3 years ago