Given the parent compound, give the mass fragment that is evident in m/z 71. Include any hydrogen atoms and the charge.

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Answer 1

Answer: I have attached the image that accompanied this question as well as the illustration that this question required.

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The Great Migration during World War I refersto the movement of(1) factory workers from the Northeast to theSun Belt(2) communists deported to Russia asundesirable aliens(3) African Americans to northern cities to findwork(4) refugees fleeing from eastern Europe to theUnited States
Match the following definition to the type of solution it describes. unsaturated solution saturated solution supersaturated solution A. The amount of solute dissolved is less that the maximum amount the solution can hold. B. The amount of solute dissolved is the maximum amount the solution can hold. C. The amount of solute dissolved is more than the usual maximum amount.

What happens to population growth in a logistic growth pattern as it reaches carrying capacity?a. remains constant
b. speeds up
c. slows down

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i believe the answer would be C. slows down, hope this helps:)

Which element has four energy levels? Na,K,Cs,Rb

Answers

Answer:

The correct option is: Potassium

Explanation:

Sodium, Potassium, Rubidium and Caesium are referred to as the alkali metals that belong to the group 1 of the periodic table, thus having one valence electron in their outer or valence shell.

Sodium, atomic number 11, belongs to the period 3 of the periodic table. It has three shells and the number of electrons per shell is 2, 8, 1.

Potassium, atomic number 19, belongs to the period 4 of the periodic table. It has four shells and the number of electrons per shell is 2, 8, 8, 1.

Rubidium, atomic number 37, belongs to the period 5 of the periodic table. It has five shells and the number of electrons per shell is 2, 8, 18, 8, 1.

Caesium, atomic number 37, belongs to the period 6 of the periodic table. It has six shells and the number of electrons per shell is 2, 8, 18, 18, 8, 1.

Therefore, Potassium, atomic number 19, has four shells or energy levels.

Among the given options, the element that has four energy levels is potassium (K). The correct answer is option 2.

An energy level is a specific amount of energy that an electron in an atom can possess.

The electronic configurations of Na (sodium), K (potassium), Cs (cesium), and Rb (rubidium) are as follows:

Na: $\rm 1s^2 2s^2 2p^6 3s^1$

K: $\rm 1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$

Cs: $\rm 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^(10)4p^6 5s^2 4d^(10) 5p^6 6s^1$

Rb: $\rm 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^(10) 4p^6 5s^1$

The above electronic configurations shows that only Potassium has 4 energy levels while Na has 3 energy levels, Cs has 6 energy levels and Rb has 5 energy levels.

Therefore, the correct answer is option 2. Potassium (K) has four energy levels.

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What element used to be mined in the upper peninsula of Michigan

Answers

coal, they use to mine for it alot

Final answer:

The Upper Peninsula of Michigan was widely known for iron mining. This region saw significant iron ore extraction, primarily in the Marquette Range, dating back to the 1800s. The mining and extraction process relied on iron smelting and made use of iron's magnetic properties.

Explanation:

The element that was extensively mined in the Upper Peninsula of Michigan is iron. This area, primarily in the Marquette Range, was a significant producer of iron ore, a key ingredient in the manufacturing of steel. The mining of iron in Michigan's upper peninsula started in the 1800s and, during its peak periods of the late 19th and early 20th centuries, the industry was critical to Michigan's economy.

Historically, iron ore was obtained through iron smelting, a process that involved heating and melting iron ore to extract pure iron. The iron was then used in various industries, primarily for the manufacturing of steel.

In extracting iron, magnetic properties of individual atoms were often considered due to iron's magnetic nature. Since iron ore is magnetically responsive, this property helped in the location and extraction of the ore. Furthermore, the delivery of the iron ore from the mines was influenced by the location of the mine, the concentration of the iron in the ore, and the difficulties associated with reducing the iron to its free metal form.

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Determime the number of moles in the following compounds; a. 125 g of H2SO4 b. 35 g of CuSO4 × 5H2O

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Mr of H2SO4 = 2+32+64= 98g No. Of moles = 125/98= 1.28 moles. B) Mr of CuSO4 = 64+32+64=160 Mr of 5H2O = 18x5=90 CuSO4.5H2O = 160+ 90 = 250g No. Of moles = 35/250= 0.14 moles

Why is cellulose so difficult for most animals to digest? A)           they don’t have the proper enzyme to break the bonds between subunits
                B)            cellulose is made up of chitin, which is indigestible
                C)            the bonds holding cellulose subunits together are extremely strong, stronger than in any other macromolecule
                D)           there are many hydrogen bonds holding the subunits together

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The answer is C .Cellulose is a long chain of glucose and to be able to use any of the energy stored in them an organism must break it down into single glucose molecules, and this is why most animals go for a different diet. The chain is very difficult to break down and must be treated with concentrated acids at high temperature. This is a hard task to do and often time needs many stomachs.

Cellulose is so difficult for most animals to digest because they don’t have the proper enzyme to break the bonds between subunits.

Further explanation

Cellulose

It is a polysaccharide compound which is difficult to be digested by animals because they don’t have the enzyme needed to break it. It has many monosaccharide molecules bind together by glycosidic bond.

Glycosidic bond

It is a covalent bond. It is formed between two monosaccharide with the removal of one water molecule. It is of two types, Alpha (between C-1 of one monosaccharide and C-2 of other monosaccharide) and beta (also between the C-1 of one monosaccharide and C-2 of another monosaccharide). Enzymes are required for breakdown of cellulose. In our body various enzymes are present for the breakdown of carbohydrates but these enzymes can never digest cellulose. Our enzymes are unable to break beta glycosidic bond but they can break the alpha glycosidic bond. A bond is present in glycogen and starch so these can be digested by human beings. It is thought that such enzymes are produced by vermiform appendix. In herbivores the enzymes which are required for the breakdown of cellulose are present in their digestive tracts so they can digest cellulose.

Animal which can digest cellulose

Grazing animals like cattle can digest cellulose because they have symbiotic bacteria in their intestine and these bacteria hep them in digestion because of special enzymes in them.

Answer details

Subject: Chemistry

Level: High school

Keywords

Cellulose
Glycosidic bond
Animal which can digest cellulose

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Use the ideal gas law to calculate the pressure in atmospheres of 0.21 mol of helium (He) at 16°C & occupying 2.53 L. You must show all of your work to earn credit. **Don't forget to convert your Celsius temperature to Kelvin***picture attached !!*

Answers

Answer:

The answer to your question is 2.32 atm

Explanation:

Data

P = ?

n = 0.214

V = 2.53 L

T = 61°C

R = 0.082 atm L/mol°K

Formula

PV = nTR

solve for P

P = nRT/V

Process

1.- Calculate the temperature in K

°K = °C + 273

°K = 61 + 273

= 334

2.- Substitution

P = (0.214 x 0.082 x 334) / 2.53

3.- Simplification

P = 5.86/2.53

4.- Result

P = 2.32 atm

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