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Dima020 [189]
3 years ago
13

What are the differences between a hypothesis, a theory, and a scientific law? Which has the greatest degree of certainty?

Chemistry
2 answers:
mario62 [17]3 years ago
8 0

Answer:

Scientific law

Explanation:

Because its based on experiments or observations, that describe or predict a range of natural phenomena.

Kaylis [27]3 years ago
8 0

A hypothesis is a limited explanation of a phenomenon;a scientific theory is an in-depth explanation of the observed phenomenon.

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You need to make an aqueous solution of 0.243 M iron(III) chloride for an experiment in lab, using a 125 mL volumetric flask. Ho
irakobra [83]

Answer:

5 g

Explanation:

From the question, we have,

Molarity of FeIII solution= 0.245 M

Volume of solution = 125 ml

From

number of moles= concentration × volume

We have;

Number of moles= 0.245 M × 125/1000

Number of moles = 0.031 moles

Molar mass of Fe III = 162.5g/moles

Mass of iron III = number of moles× molar mass = 0.031 × 162.5= 5 g

n

3 0
3 years ago
Name 2 separate problems that occur when a sample for infrared analysis is contaminated with water.
Andreyy89

Explanation:

  • The water molecules gets trapped in the crystal structure to be analysed and will give a peak in the spectra at about 3500 /cm , and there by hindering with the IR spectra of the sample to be analysed .
  • The second problem with the contamination of the sample with water is , that water makes the potassium bromide disc opaque which will decrease the absorption of the IR by the sample .
7 0
3 years ago
Please answer as fast as you can
ki77a [65]

Answer:

Probably answer D.

Explanation:

It makes the most sense because it's just changing the temp of the water  

7 0
2 years ago
Read 2 more answers
A _______ is a segment of DNA that contains the information necessary to express the inherited traits of an organism. A. protein
Ilya [14]

Answer:

"gene" is the segment of DNA containg the inheritance information.

6 0
3 years ago
I’ve gotten the answer as x=.478 but when plugging back in, .46/.478 ≠ .22. Help please
ivanzaharov [21]

Answer:

15. 2.66 moles .

16. 2.09L.

Explanation:

Molarity of a solution is simply defined as the mole of solute per unit litre of the solvent. Mathematically, it is represented as:

Molarity = mole /Volume.

With the above formula, let us answer the questions given above

15. Data obtained from the question include the following:

Volume of solution = 1.4L

Molarity = 1.9M

Mole of solute =.?

Molarity = mole /Volume

1.9 = mole / 1.4

Cross multiply

Mole = 1.9 x 1.4

Mole = 2.66 moles

Therefore, the mole of the solute present in the solution is 2.66 moles.

16. Data obtained from the question include the following:

Mole of solute = 0.46 mole

Molarity = 0.22M

Volume of solvent (water) =.?

Molarity = mole /Volume

0.22 = 0.46/Volume

Cross multiply

0.22 x Volume = 0.46

Divide both side 0.22

Volume = 0.46/0.22

Volume = 2.09L

Therefore, 2.09L of water is required.

6 0
3 years ago
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