2 Points
2 answers:
Answer:
CH₄ + 2O₂
→ CO₂
+ 2H₂O
Explanation:
This kind of reaction in which a hydrocarbon combines with oxygen gas is a combustion reaction. They are mostly used to produce heat energy that can be transformed into other forms of energy.
Every chemical reaction is made up of reactants and products. The combining species on the left hand side are the reactant and the products are the result of the combination.
Note: in writing chemical equations, the state of matter must always be included.
Reactants : Methane gas CH₄
Oxygen gas O₂
Product: Carbon dioxide CO₂
Water vapor H₂O
CH₄ + 2O₂
→ CO₂
+ 2H₂O
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Answer:
a. HCl.
b. 0.057 g.
c. 1.69 g.
d. 77 %.
Explanation:
Hello!
In this case, since the reaction between magnesium and hydrochloric acid is:
Whereas there is 1:2 mole ratio between them.
a) Here, we can identify the limiting reactant as that yielded the fewest moles of hydrogen gas product via the 1:1 and 2:1 mole ratios:
Thus, since hydrochloric yields fewer moles of hydrogen than magnesium, we realize it is the limiting reactant.
b) Here, we use the molar mass of gaseous hydrogen (2.02 g/mol) to compute the mass:
c) Here, we compute the mass of magnesium associated with the yielded 0.0248 moles of hydrogen:
Thus, the mass of excess magnesium turns out:
d) Finally, we compute the percent yield, considering 0.044 g is the actual yield and 0.057 g the theoretical yield:
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