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icang [17]
2 years ago
14

How does the volume occupied by a cubic centimeter compare with the volume occupied by a millimeter

Chemistry
1 answer:
Bad White [126]2 years ago
7 0
I'm pretty sure it's the same 2mm = 2cc = 2c^2
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When an electron is displaced in a semiconductor, the hole that's left behind is
geniusboy [140]
<span>answer is A : attracted to the negative terminal of the voltage source
 I think, that the "hole"moves as it captures a free electron leaving another hole in a slightly different place. The electron leaving leaves a net + charge, which is attracted to the negative terminal. Because the "hole" behaves as a positive charge it is attracted towards the negative terminal.</span>
5 0
3 years ago
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A balloon that had a volume of 3.50 L at 25.0°C is placed in a hot room at 40.0°C. If the pressure remains constant at 1.00 atm,
inna [77]

Answer:

3.676 L.

Explanation:

  • We can use the general law of ideal gas: PV = nRT.

where, P is the pressure of the gas in atm.

V is the volume of the gas in L.

n is the no. of moles of the gas in mol.

R  is the general gas constant,

T is the temperature of the gas in K.

  • If n and P are constant, and have different values of V and T:

(V₁T₂) = (V₂T₁)

  • Knowing that:

V₁ = 3.5 L, T₁ = 25°C + 273 = 298 K,

V₂ = ??? L, T₂ = 40°C + 273 = 313 K,

  • Applying in the above equation

(V₁T₂) = (V₂T₁)

∴ V₂ = (V₁T₂)/(T₁) = (3.5 L)(313 K)/(298 K) = 3.676 L.

7 0
3 years ago
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What does our state have that few share?
MissTica

Answer:

which state?

Explanation:

7 0
3 years ago
A world without friction would it be?<br> Bill Nye Video
cupoosta [38]

Answer:

it opposes motion. the object would continue to slide forever if not stopped by another object.

8 0
2 years ago
Which of these statements describes a chemical property
sp2606 [1]

Sugar burns in air describes a chemical property

<h3>Further explanation </h3>

In the matter of a substance, there is a process of change.

2 changes occur in the mater, namely: physical changes and chemical changes

Classification uses the principle of the initial and final state of the substance.

Physical changes are changes in the matter which in the process do not cause new substances. So the properties of the particles remain the same.

Generally, the physical changes that occur are changes in shape / size and changes due to heating, or changes in volume

Example:

  • melting

a solid changes to a liquid

  • freezing

a liquid changes to a solid

  • boiling

a solid changes to a liquid

Chemical changes are changes in the process that produce new substances that are different from the initial / forming substances. Chemical changes are usually known as chemical reactions. So there are products / reactions and reactants

So in chemical changes, there is a change in the molecule / particle

From this we can know the physical and chemical properties of a substance

  • physical properties:

melting point, viscosity, ductile, freezing point, boiling point, density, odor, solubilty, turbidity, color etc.

  • chemical properties:

Highly flammable, corroded, explosive, toxic etc.

Let's look at the answer choices in the attached picture

  • 1. water boils at 100 C

 physical properties of water that is boiling point

  • 2. mercury is liquid at room temperature

physical properties: the form of substances

  • 3. Helium is the lightest monoatomic element

physical properties: the weight or mass of a substance

  • 4. sugar burns in water to form water and carbon dioxide

chemical properties: the formation of new substances

<h3>Learn more </h3>

an example of a physical change

brainly.com/question/1119909

example of a chemical change brainly.com/question/9388643

examples of chemical changes brainly.com/question/11189422

7 0
3 years ago
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