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Leno4ka [110]
2 years ago
15

Please help I will give brainiest‼️‼️‼️‼️‼️‼️‼️

Chemistry
1 answer:
telo118 [61]2 years ago
7 0

The scientific method is the method used for scientific discovery.

<h3>What is the scientific method?</h3>

The scientific method is the process or procedure which scientists follow in their discovery and explanation of natural phenomena.

The scientific method is as follows:

  • Observations/Questions
  • Hypothesis
  • Experiments
  • Results
  • Conclusions

Using the scientific method to determine if water is needed by plants to grow

Question: Is water needed for growth in plants?

Hypothesis: Plants need water

Independent variable: sunlight

Dependent variable: rate of evolution oxygen

Constant variable: sunlight and soil

Materials: Cupboard, soil, potted plant, water,

Procedure: One potted  potted plant is watered, while the other is not watered. The length of the plant is measured after 10 days

Observation: The watered plant survived and grew while that which was not watered did not grow but died.

Conclusion: water is needed for growth in plants.

In conclusion, the scientific method can be used to determine if plants need water for growth.

Learn more about scientific method at: brainly.com/question/17274244

#SPJ1

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How do you calculate the number of neutrons in atom
Nostrana [21]

Answer:

Yes, it is standard for each element. You can calculate it from the formula: n=A-Z, where n is the number of neutrons, A is the atomic mass and Z is the atomic number.

3 0
3 years ago
If we find that there is a linear correlation between the concentration of carbon dioxide in our atmosphere and the global​ temp
loris [4]

Answer:

A

Explanation:

A linear correlation means the increase in one variable cause an increase in the other variable. In a graph, the linear correlation can be demonstrated by a right-slanted straight diagonal line. Therefore if an increase in carbon dioxide causes a directly proportional increase in global temperatures then the two are correlated.

3 0
3 years ago
1) on combustion, 1 mole of an alkane gives 2 moles of carbon dioxide and 3 moles of water. Suggest the molecular formula of thi
Crazy boy [7]
1 mole of an alkane gives 2 moles is correct answer
6 0
4 years ago
How is it possible to have thousands of different proteins when there are only 20 different amino acids?
STatiana [176]
Hi there!

Although there are only 20 amino acids, these amino acids can combine into an innumerable amount of combinations to form different and unique proteins. 

In case that doesn't make sense to you, I'll provide you with an analogy. You could be provided with 20 different LEGO bricks to work with. While there may only be 20 bricks, these bricks can combine into a vast amount of different formations, structures, etc. Amino Acids work in the same way.
3 0
3 years ago
You are instructed to create 900. mL of a 0.29 M phosphate buffer with a pH of 7.8. You have phosphoric acid and the sodium salt
Aleksandr [31]

Answer:

B and C

Explanation:

When we have to do a buffer solution we always have to choose the reaction that has the <u>pKa closer to the desired pH value</u>. When we find the pKa values we will obtain:

pKa_1=-Log[6.9x10^-^3]=2.16

pKa_2=-Log[6.2x10^-^8]=7.20

pKa_3=-Log[4.8x10^-^13]=12.31

The closer value is pKa2 with a value of 7.2. Therefore we have to use the second reaction. In which  H_2PO_4^-^1 is the <u>acid</u> and HPO_4^-^2 is the <u>base</u>. Therefore the answer for the first question is B and the answer for the second question is C.

8 0
3 years ago
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