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kondor19780726 [428]
3 years ago
9

What is scientific method? a. A plane for forming a scientific hypothesis. b. A technique for carrying out a scientific explemen

t c. A formula for analyzing scientific data d. An organized way to test scientific ideas
Chemistry
1 answer:
victus00 [196]3 years ago
4 0

Answer:

d. An organized way to test scientific ideas

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

A scientific method can be defined as a research method that typically involves the use of experimental and mathematical techniques which comprises of a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.

A hypothesis is considered to be tentative or an educated guess and can be defined as a testable explanation for an observation or a scientific problem. An example of a hypothesis is saying, Corona virus is caused by the introduction of the "5G" technology.

Thus, for any hypothesis to be true and acceptable in science, it must be supported by observations and the results of control experiments; this give rise to factual informations, theories and by extension solutions to problems.

In conclusion, we can deduce from the aforementioned paragraphs that a scientific method is simply an organized way to test scientific ideas and hypothesis.

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A chemistry student weighs out of acetic acid into a volumetric flask and dilutes to the mark with distilled water. He plans to
xeze [42]

Answer:

Your question is not complete, but use this answer as a guide for your solution.

Question: A chemistry student weighs out 0.112g of acetic acid (HCH₃CO₂) into a 250. mL volumetric flask and dilutes to the mark with distilled water. He plans to titrate the acid with 0.1600 <em>M</em> NaOH solution. Calculate the volume of solution the student will need to add to reach the equivalence point. Be sure your answer has the correct number of significant digits.

Answer: Volume of NaOH is 11.6 mL

Explanation:

The reaction of acetic acid with NaOH is as follows:

CH3COOH + NaOH -----> CH3COONa + H2O

M1V1 = M2V2

Here M1 V1 are molarity and volume of acetic acid.

M2, V2 are molarity and volume of NaOH.

Number of moles of acetic acid:

0.112 g CH3COOH × (1 mol / 60.05 g) = 0.001865 mol

Molarity = moles of solute / Liters of solution

Molarity = 0.001865 mol / 0.250 L = 0.00746 M

Hence,

M1 = 0.00746 M

V1 = 250 mL

M2 = 0.160 M

V2 = ?

V2 = M1V1 / M2

V2 = 0.00746 M × 250 mL / 0.160 M

V2 = 11.6 mL

Hence the volume of NaOH is 11.6 mL

4 0
3 years ago
A spring with constant 50 N/m is stretch 0.5 m. How much EPE does it have? A. 25 J B. 12.5 J C. 50 J D. 6.25 J
Step2247 [10]

Answer:

D. 6.25 J

Explanation:

  • EPE = 1/2*k*(Δx)²

∴ k = 50 N/m

∴ Δx = 0.5 m

⇒ EPE = 1/2*50 N/m*(0.5m)²

⇒ EPE = 6.25 N.m = 6.25 J

4 0
3 years ago
How should the nutritionist explain why fats cannot be directly converted into carbohydrates?
lara [203]

Fats cannot be directly converted into carbohydrates during gluconeogenesis, glucose is created from oxaloacetate. However, oxaloacetate generated from fats occurs via the citric acid cycle. Because carbons from fats must enter the citric acid cycle as acetyl CoA first, fats can only indirectly become carbohydrates.

Option B

<u>Explanation:</u>

Gluconeogenesis is the process by which glucose is produced in body from non carbohydrate sources like fat, amino acids etc. This process involves the conversion of each and every product into oxaloacetate and then conversion of oxaloacetate into pyruvate and then the reverse process of Glycolysis is followed.

The concentration of oxaloacetate and ADP maintains the process. An increased amount of both of them supports the gluconeogenesis. But all products must undergo citric acid cycle to get converted into oxaloacetate. So fats are indirectly converted into glucose.

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