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andrezito [222]
3 years ago
11

Which statement describes compounds?

Chemistry
1 answer:
Natasha2012 [34]3 years ago
4 0

Answer:

C

Explanation:

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Answer: Heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.

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Some animals hunt by _______ or sneaking up on their prey. It a nine letter word and there a m in the second place
guajiro [1.7K]

Answer:

Some animals hunt by <em>Camouflage</em> or sneaking up on their prey.

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2 years ago
When a substance such as ice melts, its temperature increases. describe what happens to the arrangement of the water molecules a
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The answer is B. Hope this helps :)
7 0
3 years ago
Read 2 more answers
What is the temperature at which something boils? A chemical change or property or a physical change or property?
DerKrebs [107]
The boiling point of a substance is a physical property. A physical property of a material or substance is one that can be observed without changing or altering the composition of the material. Examples are mass, Density, Color, solubility, boiling point, melting point . A chemical property of a substance is one that describes how the material changes into a completely different substance and is observed only during a chemical reaction. Examples of chemical properties include types of chemical bonds, heat of combustion, reactivity with other metals, oxidation state and enthalpy of formation.
8 0
3 years ago
If a 45.6 g piece of aluminum has a density of 2.1 g/mL, what volume would it have?
Mashcka [7]

Answer:

\boxed {\tt 21.7142857 \ mL}

Explanation:

The density formula is:

d=\frac{m}{v}

Rearrange this formula for v, volume. Multiply by v, then divide by d.

d*v=\frac{m}{v}

d*v=m

\frac{d*v}{d} =\frac{m}{d}

v=\frac{m}{d}

Volume can be found by dividing the mass by the density. The mass of the aluminum is 45.6 grams and the density is 2.1 grams per milliliter.

v=\frac{45.6 \ g }{ 2.1 \ g/mL}

Divide. Note the grams, or g, will cancel out.

v=\frac{45.6 }{2.1 \ g}

v= 21.7142857 \ mL

The volume of the aluminum is 21.7142857 milliliters.

3 0
3 years ago
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