CHEMISTRY MIDDLE SCHOOL

A student wants to increase the maximum amount of sugar that can dissolve in water. She crushes the sugar and then stirs it into the water. Does this work? Explain why or why not.

Answers

Answer 1

Answer:

Answer:

The amount of sugar that can dissolve in water increase .

Explanation:

Energy, which is the capacity to do work or produce heat, affects the rate at which a solute will dissolve.
Breaking up, crushing or grinding a sugar cube before adding it to water increases the sugar's surface area.
The more surface area a solute has, the faster it will dissolve because more particles of the sugar can interact with the water.
This means the finer the sugar particles, the faster it will dissolve.
The sugar in the middle of a sugar cube is protected from the water by the sugar in the outer layers of the cube; the water has to go through those outer layers first.
But if you crush the cube into a powder, all of the sugar is exposed to the water at once.

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What is the wavelength of a 147-g baseball traveling at 91.0 mph?

Answers

The formula to determine the wavelength is, De-Broglie wavelength formula:

$\lambda =(h)/(mv)$ -(1)

where, $\lambda$ is wavelength, m is mass, v is velocity and h is Planck's constant = $6.63* 10^(-34) Js$ = $6.63* 10^(-34) kgm^(2)s^(-1)$

mass, m = 147 g (given)

Since, 1 g = 0.001 kg

So, 147 g = 0.147 kg

v = 91.0 mph (given)

Converting mph to mps:

Since, $1 mph = (1.609* 10^(3) ms^(-1))/(60* 60)$

So, $90 mph = (91* 1.609* 10^(3) ms^(-1))/(60* 60)$ = $40.67 ms^(-1)$

Substituting the values in formula 1:

$\lambda =(6.63* 10^(-34) kgm^(2)s^(-1))/(0.147 kg* 40.67 ms^(-1))$

$\lambda =1.11* 10^(-34) m$

Hence, the wavelength wavelength of a 147-g baseball traveling at 91.0 mph is

$1.11* 10^(-34) m$ .

Answer: its D

Explanation:

Describe a test to determine whether an object is charged or uncharged.

Answers

What do you mean ???????

Who used experiments and scientific tools to study matter?

Answers

John Dalton used experiments and scientific tools to study matter

Final answer:

Chemists and Physicists use controlled experiments and scientific tools like microscopes and spectrometers to study the chemical and physical properties of matter.

Explanation:

Scientists, particularly Chemists and Physicists, are the ones who use experiments and scientific tools to study matter. They conduct controlled experiments to investigate the physical and chemical properties of different types of matter. For instance, they utilize scientific tools such as microscopes, spectrometers, and calorimeters to measure, observe, and analyze matter at various levels. By using these tools, scientists are able to gather precise and reliable data to better understand the composition, structure, and reactions of matter.

Learn more about Experiments & Scientific Tools here:

brainly.com/question/1347425

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A passenger walks toward the rear of a moving train. Describe her motion as seen from a reference point on the train. Then describe it from a reference point on the ground.

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If the train is moving from Point A to Point B, and this motion we arbitrarily deem "forward", then from the reference point of the train, she will be moving backward. From an external reference point, she will be moving in the same direction as the train, but with a lessened velocity.

Compare and contrast quantitative and qualitative data.

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quantitative data is based on the numbers in an observation. for example: there were 40 apples. qualitative data does not contain numbers. it is based off of straight facts and what you can see or touch

Answer:

qualitative data—deals with characteristics or qualities expressed in words; displayed in circle and bar graphs

quantitative data—deals with quantities expressed in numbers; displayed with circle, bar, and line graphs as well as histograms and scatterplots

Explanation:

Which of the following best defines homeostasis?Forming identical cells
Breaking down glucose
Maintaining stable internal conditions
Increasing an organism's temperature

Answers

the third one i did the test

Maintaining stable internal conditions

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