Which section of the reaction represents the products? A) a B) b C) c D) d
2 answers:
Answer: D) d
Explanation:
Reactants of a chemical reaction is defined as the substances which take part in a chemical reaction and undergoes a chemical change. Reactants are written on left side of the arrow. Part labelled as a.
Thus barium hydroxide and ammonium nitrate are reactants of the reaction.
Products are defined as the substance which are formed at the end of the chemical reaction.Products are written on the right side of the arrow. part labeled as d.
Thus barium nitrate, ammonia and water are products of the reaction.
Heat is the necessary condition for the reaction. Labeled as b.
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Answer:
3.98g
Explanation:
Given parameters:
Number of molecules = 1.2 x 10²⁴ molecules
Unknown:
Mass of H₂ = ?
Solution:
To find the mass of this molecule, we use the expression below:
Mass = number of moles x molar mass
Molar mass of H₂ = 2(1) = 2g/mol
6.02 x 10²³ molecules are contained in 1 mole of a substance
So; 1.2 x 10²⁴ molecules will have = 1.99 moles of H₂
Mass of H₂ = 1.99 x 2 = 3.98g