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drek231 [11]
4 years ago
11

What is true of a compound? . a. It does not retain the properties of the substances that make it up. b. It retains the properti

es of the substances that make it up. c. It is usually red.
Chemistry
1 answer:
LekaFEV [45]4 years ago
8 0
A. It does not retain the properties of the substances that make it up
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When two aqueous solutions are mixed together the temperature of the solution decreases?
Andre45 [30]
When two aqueous solutions are mixed together and the temperature of the solution decreases, the reaction is called an endothermic reaction with a positive enthalpy change. Endothermic reaction is when heat is absorbed by the reaction taking place. All endothermic reaction always have a positive enthalpy change.
8 0
3 years ago
How many moles are in 1.9 x 1046 atoms of chromium?
faust18 [17]

Answer:

<h2>3.156 × 10²² atoms</h2>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L} \\

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

From the question we have

n =  \frac{1.9 \times  {10}^{46} }{6.02 \times  {10}^{23} }  \\  = 3.156 \times  {10}^{22}

We have the final answer as

<h3>3.156 × 10²² atoms</h3>

Hope this helps you

8 0
3 years ago
true or false: 1. An object can have only one type of energy at a time 2. If an object has energy, it must be moving. 3. All ene
gregori [183]
True is the correct answer
4 0
3 years ago
All of the following are reasons why equations or balanced EXCEPT
Anni [7]

Answer:

monkey

Explanation:

4 0
3 years ago
Does gases have a kinetic attraction? Yes or no.
satela [25.4K]

Answer:

No

Explanation:

There are no interactive forces (i.e., attraction or repulsion) between the particles of a gas.

The average kinetic energy of gas particles is proportional to the absolute temperature of the gas, and all gases at the same temperature have the same average kinetic energy.

7 0
3 years ago
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