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DiKsa [7]
3 years ago
5

What is Artificial selection???

Chemistry
1 answer:
kati45 [8]3 years ago
7 0

Answer:

The process of selection conducted under human direction.

Explanation:

For example, by allowing only like individuals to breed, breeders have created the great variety of dog breeds and crop plants

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What is an animal that eats producers called?​
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A consumer

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How many moles of n are in 0.163 g of n2o?
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First convert 0.163 grams of N2O to mol by dividing it with the molecular weight. The molecular weight of N2O is 44 grams/mol. The answer would be 3,79x10^-3. Then multiply it with 2 since there are 2 Nitrogen in one mole of N2O. Therefore, there are 7.41x10^-3 moles of Nitrogen. 

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Which of the following is NOT a sign (indicator) that a chemical reaction has occurred?
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C

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Which of the following statements regarding energy changes during a reaction are true?. 1) If the heat of reaction, ΔH, is negat
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2.<span>Two or more atoms must collide, with proper orientation, with energy greater than or equal to the activation energy for a reaction to occur</span>
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Balance the following chemical equation:<br>__N2H4+<br>__O2 =<br>__NO2 +<br>__H2O​
Deffense [45]

The answer for the following question is mentioned below.

N_{2}H_{4} +3 O_{2} →2 NO_{2} +2 H_{2} O

the equation is balanced.

Explanation:

The steps required to balance a chemical equation is:

Firstly,write the formula of the compound/substance.

Secondly,count the number of atoms in each element on each side of the equation

Thirdly,Adjust the co-efficient.Balance the atoms or the ions present in the greatest number.

You may do this by finding the lowest common multiple of two.

Continue systematically to balance the atoms or ions on the rest of the side (i.e.)on the other side.

Lastly,check the number of atoms each elements is same on both the sides

From the equation:

Before balancing the equation:

N_{2} H_{4} + O_{2} → NO_{2} + H_{2} O

After balancing the equation:

N_{2}H_{4} +3 O_{2} →2 NO_{2} +2 H_{2} O

Therefore the given equation is balanced.

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3 years ago
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