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Feliz [49]
3 years ago
8

Why should scientists perform experiments?

Chemistry
2 answers:
tia_tia [17]3 years ago
7 0
Scientists observe the world around them, from which to draw questions. Their predictions as to the answer are what we call a “hypothesis”. Thus, a scientist’s job is to answer the very hypotheses that they and their piers come up with.
hjlf3 years ago
7 0

Answer:

The correct answer will be option-A.

Explanation:

Science is a branch of knowledge which explains the natural phenomenon or process of our surrounding nature.  The branch tries to answer the scientific questions after the logical and sequential steps of the scientific methods are followed.  

In a scientific method, to answer a scientific question, the scientific hypothesis is constructed which could be proved on the basis of experiments based on which results could be concluded.

Thus, scientist performs experiments to understand and answer the hypothesis, therefore, option-A is correct.

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The solubility of Z is 60 g/ 100 g water at 20 °C. How many grams of solution are produced when a saturated solution is prepared
V125BC [204]

Answer:

Saturated solution = 180 gram

Explanation:

Given:

Solubility of Z = 60 g / 100 g water

Given temperature =  20°C

Amount of water = 300 grams

Find:

Saturated solution

Computation:

Saturated solution = [Solubility of Z] × Amount of water

Saturated solution = [60 g / 100 g] × 300 grams

Saturated solution = [0.6] × 300 grams

Saturated solution = 180 gram

3 0
3 years ago
a 160 milligram sample of a radioactive isotope decays to 10 kilograms in 12 years. what is the half life of this element
Shkiper50 [21]

Answer:

3 years

Explanation:

Given data:

Initial amount of sample = 160 Kg

Amount left after 12 years = 10 Kg

Half life = ?

Solution:

at time zero = 160 Kg

1st half life = 160/2 = 80 kg

2nd half life = 80/2 = 40 kg

3rd half life = 40 / 2 = 20 kg

4th half life = 20 / 2 = 10 kg

Half life:

HL = elapsed time / half life

12 years / 4 = 3 years

8 0
3 years ago
What is the main reason scientists perform experiments
Anuta_ua [19.1K]
B, they then interpret that data to find their answers
3 0
4 years ago
Read 2 more answers
I need help ASAP PLZ!!!! I’m having trouble with a question, “How does the particle theory of matter help you explain why cold w
Kamila [148]
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. ... Cold water is more dense and will sink in room-temperature water.
8 0
3 years ago
The empirical formula of a group of compounds is CHCl. Lindane, a powerful insecticide, is a member of this group. The molar mas
Sergeeva-Olga [200]

Answer:

<h2>D) 6</h2>

Explanation:

since,   n = molar mass / empirical formula mass

   Empirical formula mass = Total mass of atoms present in empirical formula

                       CHCl = 12+1+35.5

                                = 48.5

 Given, Molar mass = 290.8 g.

           So,        n = 290.8/48.5

                           = 5.995 , that is approx  6.

        So, Molecular formula = n × Empirical formula

                                           = 6 × CHCl

                                           = C_{6}H_{6}Cl_{6}

       So,   Number of C = 6

3 0
4 years ago
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