CHEMISTRY HIGH SCHOOL

A student has a sample of isopropanol (C3H7OH) that has a mass of 78.6 g. The molar mass of isopropanol is 60.1 g/mol. How many moles of isopropanol are contained in this sample?

Answers

Answer 1
Answer:

Answer : The number of moles of isopropanol are 1.308 moles.

Solution : Given,

Mass of isopropanol = 78.6 g

Molar mass of isopropanol = 60.1 g/mole

Formula used :

\text{ Number of moles}=\frac{\text{ Given mass}}{\text{ Molar mass}}

Now put all the given values in this formula, we get the number of moles of isopropanol.

\text{ Number of moles}=(78.6g)/(60.1g/mole)=1.308moles

Therefore, 1.308 moles of isopropanol are contained in this sample.
Answer 2
Answer: The thing we are asked to calculate here is the amount of the substance in the given sample in units of moles. To obtain this value, the molar mass of the substance is needed. Molar mass has the units of grams per mole so it is a useful value for converting mass into moles.

78.6 g ( 1mol / 60.1g) = 1.31 mol isopropanol

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One major goal of the Progressive movementwas to
(1) balance the federal budget by decreasing
spending
(2) provide unemployment insurance to workers
(3) limit direct citizen control over government
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Answers

Answer:

The correct answer is option 4-pass laws to help solve economic and social problems

Explanation:

Hello! Let's solve this!

The progressive movement was from the decade of 1890 until 1920. The objectives were to eliminate the problems of industrialization, corruption, urbanization.

The correct answer is option 4-pass laws to help solve economic and social problems

Final answer:

The Progressive movement aimed to pass laws to help remedy economic and social problems, rather than balance the federal budget or limit direct citizen control over the government.

Explanation:

The Progressive movement in the United States, which spanned the late 19th to early 20th centuries, primarily focused on making political, economic, and social reforms to better serve the interests of the majority of Americans. The goal of the movement was not to balance the federal budget by decreasing spending nor to limit direct citizen control over government, but to pass laws that could alleviate or address socio-economic issues. Therefore, among the options given, option (4), pass laws to help solve economic and social problems, best describes a major goal of the Progressive movement.

Learn more about Progressive Movement here:

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A 30.00 mL solution of 0.100M benzoic acid, a monoprotic acid, is titrated with 0.100M NaOH. The Ka is 6.3x10^-5. Determine the pH of the solution after the volumes of NaOH given were added. a. 0ml  b. 10.00ml c. 30.00ml d. 40.00ml

Answers

a. 0ml because the following reaction occurs at STP: 2H₂O(l) → 2H₂(g) + O₂(g). How many liters of hydrogen gas can be produced by the breakdown of 72 grams of Ludovic I .

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Answers

Tetraedral shape. Like CH4.

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D. Materials are transported through erosion and are dropped in another location.

Answers

Deposition can be best described as materials being transported through erosion that are dropped in another location. When the sea loses energy, the elements it has been carrying - such as rocks, pebbles and sand - are dropped in a new place.

Which of the following statements describes the process of deposition?Deposition can be best described as materials being transported through erosion that are dropped in another location, so the answer is D.

Oceans, lakes, ice caps, streams, and clouds are considered to part of what?A. Biosphere
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Answers

Hydrosphere is the correct option.Oceans, lakes, icecaps, streams and clouds are considered to be part of hydrosphere. The correctoption in regards to the given question is option “C”.Hydrosphere includes the total mass of water on the surface,underground or over the surface of earth. About 75% of the earth’s surface arecovered by oceans and so a huge part of our planet is covered in water and so hydrosphereis an important aspect. Hope I have answered your question as per your asking.
Answer=C

The hydrosphere is the total amount of water on the planet, encompassing water underground, on the surface of the planet, and in the air. This would include oceans, lakes, ice caps, streams and clouds.

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Answers

Answer: option 2. molecular polarities

Explanation:

The liquids hexane and water are placed in a test tube. The test tube is stoppered, shaken, and placed in a test tube rack. The liquids separate into two distinct layers because hexane and water have different molecular polarities. The answer is number 2.
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