CHEMISTRY COLLEGE

Be sure to answer all parts. A baseball pitcher's fastballs have been clocked at about 97 mph (1 mile = 1609 m). (a) Calculate the wavelength of a 0.148−kg baseball (in nm) at this speed. × 10 nm (Enter your answer in scientific notation) (b) What is the wavelength of a hydrogen atom at the same speed? nm

Answers

Answer 1

Answer:

Answer:

a) The wavelength of the baseball is $1.033* 10^(-25) nm$ .

b) 9.131 nm is the wavelength of a hydrogen atom at the 43.35 m/s.

Explanation:

Velocity of the baseball = v = 97 mile/hour

1 mile = 1609 meter

1 hour = 3600 seconds

$v =(97* 1609 m)/(3600 s)=43.35 m/s$

Mass of baseball = m = 0.148 kg

Wavelength of the baseball: $\lambda$

$\lambda =(h)/(mv)$ De Broglie wavelength

h =Planck's constant

$=(6.626* 10^(-34) Js)/(0.148 kg* 43.35 m/s)$

$\lambda =1.033* 10^(-34) m$

$1 m=10^9 nm$

$\lambda = 1.033* 10^(-25) nm$

The wavelength of the baseball is $1.033* 10^(-25) nm$ .

Mass of the hydrogen atom = $m=1.674* 10^(-27) kg$

Velocity of hydrogen atom = u = 43.35 m/s

$\lambda =(h)/(mv)$ De Broglie wavelength

$=(6.626* 10^(-34) Js)/(1.674* 10^(-27) kg* 43.35 m/s)$

$\lambda =9.131* 10^(-9) m$

$1 m=10^9 nm$

$\lambda =9.131 nm$

9.131 nm is the wavelength of a hydrogen atom at the 43.35 m/s.

Answer 2

Answer:

Final answer:

To calculate the wavelength of the baseball and hydrogen atom, we can use the wavelength formula. However, the wavelengths calculated are extremely small and cannot be practically detected.

Explanation:

To calculate the wavelength of the baseball, we can use the wavelength formula: λ = v/f. In this case, the velocity (v) of the baseball is given as 97 mph, which is equal to 97 * 1609 m/h. The frequency (f) can be calculated by dividing the speed of light (3 * 10^8 m/s) by the wavelength of the baseball.

For the hydrogen atom, we can use the same formula. However, we need to convert the hydrogen atom velocity to m/s. Once we have the velocity in m/s, we can calculate the wavelength by dividing the velocity by the frequency.

It is important to note that the wavelength calculated for the baseball and hydrogen atom are extremely small and cannot be practically detected by our senses or instruments.

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A disaccharide forms when: two monosaccharides join by dehydration synthesis. two starches join by hydrolysis. two starches join by dehydration synthesis. a starch and a monosaccharide join by dehydration synthesis. two monosaccharides join by hydrolysis.

Answers

Answer:

two monosaccharides join by dehydration synthesis

Explanation:

A disaccharide is formed when two monomers join together by a loss of water molecule.

Final answer:

A disaccharide is formulated when two monosaccharides join through dehydration synthesis. A water molecule is dropped, and a glycosidic bond is formed between the two sugar elements. Sucrose, lactose, and maltose are crucial disaccharides for humans.

Explanation:

A disaccharide forms when two monosaccharides join by dehydration synthesis. This reaction involves a hydroxyl group (-OH) of one monosaccharide combining with a hydrogen atom of another monosaccharide. As a result, a molecule of water (H₂O) is released, and a covalent bond, specifically known as a glycosidic bond, forms between the two sugar molecules. Disaccharides critical for humans include sucrose (table sugar), lactose (milk sugar), and maltose (malt sugar). However, the human body cannot directly use these. They must first be split into their constituent monosaccharides via a separate process known as hydrolysis in the digestive tract.

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Use the drop-down menus to answer the questions.Which organism begins this food chain and is a producer?
Which organism gains energy from eating the frog?
Which organism has the most available energy in this food chain?

Answers

Answer:

grass

snake

grass

Explanation:

just did it :)

Can you send a picture? That’s the only way I can see the problems

But, the producers should be on the bottom of the food chain, likely grass or something of the sort (plants)

If the frog has a line pointing to another organism, then that’s the organism that gains energy from eating it

How much heat energy would be needed to raise the temperature of a 223 g sample of aluminum [(C=0.895 Jig Cy from 22.5°C to 55 0°C? Η Ο Ο Ο ΟΟ 10x10) not enough information given Prov 40 25 11 Next >

Answers

Answer : The heat energy needed would be, 6486.5125 J

Explanation :

To calculate the change in temperature, we use the equation:

$q=mc\Delta T\n\nq=mc(T_2-T_1)$

where,

q = heat needed = ?

m = mass of aluminum = 223 g

c = specific heat capacity of aluminum = $0.895J/g^oC$

$\Delta T$ = change in temperature

$T_1$ = initial temperature = $22.5^oC$

$T_2$ = final temperature = $55.0^oC$

Putting values in above equation, we get:

$q=223g* 0.895J/g^oC* (55.0-22.5)^oC$

$q=6486.5125J$

Therefore, the heat energy needed would be, 6486.5125 J

A student is heating a chemical in a beaker with a Bunsen burner.In a paragraph of at least 150 words, identify the safety equipment that should be used and the purpose of it for the given scenario.

Answers

When a student is warming a chemical in a container using a special burner, it is very important to focus on safety by using the right safety tools.

What is the safety equipment

First, the student needs to wear the right safety clothes like a lab coat, gloves, and goggles to protect themselves from getting splashed or hurt by chemicals. A lab coat stops chemicals from touching the skin, gloves keep the hands safe, and safety goggles protect the eyes from chemicals

and hot things.

Furthermore, using a fume hood is necessary to make sure there is enough fresh air circulating and to remove any dangerous fumes or gases that might be released while heating things up.

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Answer:The student should be wearing a lab coat or maybe an apron to prevent chemicals from spilling or exploding onto their clothes, I do recommend a lab coat better though because it can protect your skin better. Next, make sure while messing with chemicals you are always wearing goggles, if you are not wearing them there is a chance that after touching chemicals you could touch your eyes. And that brings me to washing your hands straight away after messing with chemicals. You could also wear gloves and just take them off when you're done but if you don't have clean hands afterward you could always put the chemicals all over your skin. But in case you do touch your eyes there is always an emergency eyewash station somewhere in the lab room. And if you are to get Chemicals on your skin, in your hair, on your clothes, or to be on fire, there shall be a shower somewhere to get rid of that. But if you read the instructions or listen closely to the teacher you shall have no problem.

Explanation:

I kinda got off topic

How is the ocean important to human survival? restate the question

Answers

Answer:

How is the ocean important to human survival? The air we breathe: The ocean produces over half of the world's oxygen and absorbs 50 times more carbon dioxide than our atmosphere. Climate regulation: Covering 70 percent of the Earth's surface, the ocean transports heat from the equator to the poles, regulating our climate and weather patterns

Explanation:

PLEASE HELP FAST!!If metal X is lower than metal Y on the activity series, then:
A. X will react in water, but only if the temperature is low enough
B. Y will form oxides of X, but only indirectly
C. X will replace ions of Y in a solution
D. Y will replace ions of X in a solution

Answers

Answer:

D. Y will replace ions of X in a solution

Explanation:

If metal X is lower than metal Y on the activity series, then Y will replace ions of X in a solution.

This is the crux of single displacement reactions.

In a single displacement reaction, a metallic ion in solution is replaced by a metal higher in the activity series than the metal in solution.
On the activity series, metals higher are more reactive and will displace the lower and less reactive ones.
Reactivity increases up the group.

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