1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ryzh [129]
3 years ago
15

If the reaction yield is 94.4%, what mass in grams of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of

water? mg(s)+2h2o(l)→mg(oh)2(s)+h2(g)
Chemistry
1 answer:
CaHeK987 [17]3 years ago
6 0
First, it is important to list the molar mass of the relevant substances.

Molar mass of magnesium = 24.305 g/mol
Molar mass of water = 18.0153 g/mol
Molar mass of H2 = 2.0159 g/mol

Second, we need to determine the limiting reactant for the chemical reaction. We take 4.73 g of Mg and determine the stoichiometric amount of water needed for it to be completely consumed. This is shown in the following equation:

4.73 g Mg x mol Mg/24.305 g x 2 mol H2O/1 mol Mg x 18.0153 g/mol H2O = 7.0119 g H2O

Thus, we have determined that 7.0119 g H2O is needed to completely react 4.73 g Mg. The given amount of 1.83 g H2O is insufficient which then indicates that water is the limiting reactant and should be the basis of our calculations. 

Next, given 1.83 g H20, we calculate the theoretical yield of hydrogen gas using stoichiometry. The equation is then:

1.83 g H2O x mol H20/18.0153 g x 1 mol H2/2 mol H2O x 2.0159 g/mol H2 = 0.1024 g H2

However, the reaction yield was given to be 94.4%. The reaction yield is given by the formula percent yield = actual yield/ theoretical yield x 100%. Thus, the actual yield of hydrogen gas can be determined using the formula. 

Actual yield of H2 = 0.94*0.1024 g H2

Thus, the amount of hydrogen gas produced is 0.0963 g.   
You might be interested in
The actual yield of a certain reaction is 44.0 g, while the theoretical yield is 50.0 g. Calculate the percent yield.
Goshia [24]
Percent yield represents to what extent the reaction runs to completion. In this, the theoretical yield is 50 grams (100% completion).

To calculate percent yield, divide the actual by the theoretical. In doing so, the percent yield is 88% (44/50).
3 0
3 years ago
Read 2 more answers
The pressure of a gas contained in a cylinder with a movable
insens350 [35]

Answer:

B) 244.5

Explanation:

2.62 torr =349.3046 pascals.

349.3046*0.7 sq meter = 244.5 N

4 0
3 years ago
Why does soap decrease the surface tension of water?
e-lub [12.9K]

Answer:

Soap decreases surface tension by changing the way water behaves on the surface. Hard and soft water react differently when soap is added to them.

Explanation: i think it is this

8 0
2 years ago
¿Cuál es la molaridad de 275 ml de solución, que se preparó disolviendo 42 g de hidroxido de sodio NaOH en agua?
Dovator [93]
CEYSDINO IS A FILE SPAMMER SHE OR HE USES DIS FILE TO GET YOUR INFORMATION...

8 0
3 years ago
What happens to water during evaporation?
kotegsom [21]
D would be your best bet because evaporation occurs when water is heated, it then vibrates and then magic!
5 0
3 years ago
Read 2 more answers
Other questions:
  • When matter is broken down physically by wind or chemically by salt water, what is this known as?
    12·1 answer
  • What factors should be taken into consideration when choosing the ideal solvent for the crystallization of a particular compound
    5·1 answer
  • Calculate the density of a sample of metal that has a mass of 1668 g and takes up a volume of 186.2 cm
    14·1 answer
  • Balance the following chemical equation:<br>NaBr+<br>Cl2, –<br>NaCl+<br>Br2​
    15·1 answer
  • 1. Que factores provocan la oxidación?
    13·1 answer
  • Which of the following describes wind direction?
    14·2 answers
  • The diagram below shows part of the rock cycle. (6 points)
    13·2 answers
  • What do we know about the arrangement of atoms during a chemical reaction?
    12·2 answers
  • How many amps are required to produce 75. 8 g of iron metal from a solution of aqueous iron(iii)chloride in 6. 75 hours?
    14·1 answer
  • Which structure is the arrow pointing to?<br><br> What is the function of this organelle?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!