Because of making the equestion to be more stable and form the best compound according to it's reactant.
Weight percentage of nitrogen can be calculated using the following rule:
weight percentage of nitrogen = (weight of nitrogen / weight of urea) x 100
From the periodic table:
molecular mass of carbon = 12 grams
molecular mass of nitrogen = 14 grams
molecular mass of hydrogen = 1 grams
molecular mass of oxygen = 16 grams
therefore:
mass of nitrogen in urea = 2(14) = 28 grams
mass of urea = 12 + 2(14) + 4(1) + 16 = 60 grams
Substitute with the masses in the equation to get the percentage:
weight percentage of nitrogen = (28/60) x 100 = 46.667%
The correct answer is high temperature solids
Half reaction :
Oxidation
Cu ⇒ Cu²⁺ + 2e⁻
Reduction
2Ag⁺+ 2e⁻ ⇒2Ag
<h3>Further explanation</h3>
Given
Reaction
Cu+2AgNO₃⇒Cu(NO₃)₂+2Ag
Required
Oxidation and reduction half-reactions
Solution
Oxidation is an increase in oxidation number, while reduction is a decrease in oxidation number.
Cu ⇒ Cu²⁺ + 2e⁻
0 to +2
2Ag⁺+ 2e⁻ ⇒2Ag
+1 to 0
A substance intentionally added that affects the nature and quality of food is called food material.
There are seven most important components in food materials: carbohydrates, fats, proteins, vitamins, mineral salts, water and fibre.
Some other examples of food material:
1) Food dyes are chemical substances who gives artificial color to the food.
It is important to know which food dyes are in food because some dyes can cause allergic reactions or cancer.
2) Emulgators are used as an additive to food to emulsify some food.
Emulsions are two or more liquids that are normally not mixable. For example egg yolk and mayonnaise.
More about food dyes: brainly.com/question/23516560
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