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Gala2k [10]
3 years ago
12

When does a substance have a definite shape?

Chemistry
1 answer:
choli [55]3 years ago
8 0
A substance has a definite shape when it is a solid, that way it can hold its shape. 
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The Answer is C. Abiotic Factors
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2 years ago
Write down the different uses of water that you know about​
Yakvenalex [24]

Answer:

The various uses of water :

1. Water is used for daily purpose like cooking , bathing , cleaning and drinking.

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3. water maintains the temperature of our body.

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2 years ago
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a. The atomic mass defines the elemental identity of an atom. b. The atomic number of an element is approximately equal to the n
olga nikolaevna [1]

B

Explanation:

option b is correct because

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3 0
3 years ago
Balance the following redox equation and identify the element oxidized, the element reduced, the oxidizing agent, and the reduci
earnstyle [38]

The charge of Br changed from –1 to 0, therefore it is the element which is oxidized. Since it is oxidized then Br is also the reducing agent.

 

The charge of Mn changed from +4 to +2 therefore it is the element which is reduced. Since Mn is reduced, then MnO2 is the oxidizing agent.

 

The half –reactions are:

Br: 2Br --> Br2 + 2e-

Mn: MnO2 --> Mn2+

First balance oxygen by adding H2O:

MnO2 --> Mn2+ + 2H2O

Then balance hydrogen by adding H+ ions:

4H+ + MnO2 --> Mn2 + 2H2O

Then the appropriate electrons:

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Multiply the half-reaction of Br by 2 because the half-reaction of Mn has 4 electrons.

4Br --> 2Br2 + 4e-

 

Combine the two half reactions and cancel common factors:

4Br-  +  4H+  +  MnO2 --> 2Br2  +  Mn2  +  2H2O

6 0
2 years ago
What is a closed container in relation to the law of conservation of mass?
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</span>
4 0
2 years ago
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