The products of a combustion reaction do NOT include ____. (1 point) water carbon dioxide carbon monoxide hydrogen The products
2 answers:
Answer: Option (d) is the correct answer.
Explanation:
In combustion reaction, a compound reacts with oxygen and results in the formation of carbondioxide and water.
For example, when propane reacts with oxygen it results in the formation of carbondioxide and water.
The reaction is as follows.
Also, when there is incomplete combustion of carbon then it results in the formation of carbon monoxide. This reaction is as follows.
Thus, we can conclude that the products of a combustion reaction do NOT include hydrogen.
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Answer: is a reactant; it is present before the reaction occurs.
Explanation:
In a chemical reaction the chemical formulas written before the arrow are described as reactants as they react together to form products which are written after the arrow.
Thus and HCl are reactants here whereas
,
and
are products.
Answer: There are atoms of hydrogen are present in 40g of urea,
.
Explanation:
Given: Mass of urea = 40 g
Number of moles is the mass of substance divided by its molar mass.
First, moles of urea (molar mass = 60 g/mol) are calculated as follows.
According to the mole concept, 1 mole of every substance contains atoms.
So, the number of atoms present in 0.67 moles are as follows.
In a molecule of urea there are 4 hydrogen atoms. Hence, number of hydrogen atoms present in 40 g of urea is as follows.
Thus, we can conclude that there are atoms of hydrogen are present in 40g of urea,
.