CHEMISTRY MIDDLE SCHOOL

What effect does observing a substance's physical properties have on the substance?

Answers

Answer 1
Answer: There is no effect. When you observe a substance's physical properties, you're not doing anything that would catalyze a chemical change. For example, you most often observe with your eyes, and/or, if safe, you waft the substance's smell to your nose. Neither of these observations will effect the substance's physical properties.

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Why is the collision theory considered to be well-established and highly reliable?

Answers

BECAUSE IT NEVER BREAKES

Why is a mass movement of mud called a flow?

Answers

In terms of a deeper scientific reason, I am not sure, but the basic reason is quite simple. "Mud" tends to look like a mix between a solid, dirt, and a liquid, water or some other liquid. Since it is, in fact, a cross between a solid and a liquid, it has properties of both. It has certain physical and visual properties that only a solid would have, such as texture and opaqueness, but it also has physical properties of a liquid. Since it leans more towards the liquid side than the solid side, we say mud "flows" rather than saying that it "rolls" or "bounces".

How much of each gas is there in 100cm3 air?

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Each 100 cm3 of air, constitutes 78cm3 nitrogen, 21cm3 oxygen and 1cm3 constitutes of other gases like Argon, ozone, carbon dioxide and water vapour in small amounts.
Dry air contains 78% nitrogen , 21% oxygen and 1%noble gases.

An empty party balloon will float to the ceiling of a room once it is filled with helium.A. What does this tell you about the density of air in the room compared to the density of helium?

B. For the balloon to float in air, what two factors might have changed about the balloon?

Answer those two questions of you know the answer.

Answers

Helium is a gas composed of itself, were air is composed of Oxygen and Nitrogen making the air more dense than the helium making it float to find other gases


Two factors to change are Air pressure (due to the balloon moving ) and the helium making the balloon rise.


That's about all I can explain...hope this helps >.< 

KyTe + Fe(HCO3)2 ------> KHCO, + Fete
how do you balance the equation?

Answers

Answer:

You make each side equal to the other by muktiplying it by a number and yiu keep that number on each side. Hope this helps. :]

Explanation:

Which volume is the smallest?A. One milliliter
B. One deciliter
C. One liter
D. One microliter

Answers

Answer:

d) one microliter

Explanation: The advantage of the SI (International system of measurements) is that everything is in base 10, and the prefix indicates the power of 10.

For the volume, the base unit is the liter.

one microliter = 0.000001 liter (one millionth, 1 / 1000000, of a liter)

one deciliter = 0.1 liter (one tenth, 1/10,  of a liter)

one liter = 1 liter

one milliliter = 0.001 liter (one thousand, 1/1000, of a liter)

As you can see, a microliter is by far the smallest of these units.

Final answer:

The smallest volume unit among the given options (One milliliter, One deciliter, One liter, One microliter) is One microliter.

Explanation:

The volume of a substance is a measure of the space it occupies. In this case, we need to identify the smallest unit of volume from the given options. The unit, microliter (represented by µL), is the smallest volume unit among the options. Here's a quick breakdown:

  • 1 milliliter (mL) = 1000 microliters (µL)
  • 1 deciliter (dL) = 100 milliliters (mL) or 100000 microliters (uL)
  • 1 liter (L) = 10 deciliters (dL) or 1000 milliliters (mL) or 1000000 microliters (µL)

So, the correct answer to your question is D. One microliter.

Learn more about Volume here:

brainly.com/question/31946306

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