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Reil [10]
2 years ago
15

Which of the following undergoes change during a chemical reaction?

Biology
1 answer:
galben [10]2 years ago
3 0
D. chemical bonds between reactants.

In a chemical reaction, the reactants break and establish new bonds between atoms by exchanging electrons. The overall atomic mass doesn't change. Element identities only change with a loss or gain of protons, which happen in nuclear reactions. The total number of electrons does not change, just become exchanged or shared between atoms.
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Vika [28.1K]

Answer:

hypothesis is an idea or explanation that then test through study and experimentation

7 0
2 years ago
Question about nitrogen and phosphorous cycle? Which statements are true, list all that apply
vaieri [72.5K]

Answer: 1) When phosphorous is not bound in rocks, it moves quickly through land food webs. Constant use of phosphate-rich fertilizers will help increase phosphorus availability to plants, thus ultimately helping our ecosystems.

3) Minimizing the use of ammonia-rich fertilizers on lawns would not add excess nitrogen to the nitrogen cycle. As a result, it would help decrease the pollution of food webs in the oceans, decrease soil acidity on land, and decrease the amount of greenhouse gases in the atmosphere

Explanation:

The nitrogen and phosphorus cycles both are biochemical cycles. The nitrogen cycle involves the process of uptake of nitrogen from the atmosphere by the soil bacteria which is then become available to the plants for plant growth, from plants it is transferred to the other organisms in different forms.

The phosphorus is found in the rocks and these rocks wither and the inorganic phosphorus become available to the ecosystems.

Option 1 is correct, this is because the phosphorus is available on earth in the inorganic form inside the rocks, the withering and erosion processes make the phosphorus available to the plants. Another source of phosphorus to plants is phosphorus rich fertilizers. Thus plants will absorb phosphorus and grow. These plants will be consumed by other organisms thus the ecosystem will remain healthy.

Option 3 is correct, this is because nitrogen rich fertilizers can cause eutrophication in water bodies, or can contaminate the water. It will decrease the pH of the soil due to the formation of nitric acid. Also the nitrogen dioxide is the greenhouse gas.

 

4 0
3 years ago
An element has an atomic mass number of 16 and an atomic number of 7.
professor190 [17]

16-7= 9 you subtract the atomic number from the mass and get the number of neutrons so there ae 7 protons and 9 neutrons

4 0
3 years ago
During asexual reproduction yeast cells can produce _____
Taya2010 [7]
Genetically identical offerings or daughter cells by binary fission
8 0
2 years ago
Which of the following processes make a sweat when I exercise
Dima020 [189]

Answer:

Homeostasis

Explanation:

Homeostasis is an organism ability to maintain equilibrium [which means balancing opposing forces]. When we sweat our body it is trying to stop overheating.

7 0
3 years ago
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