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
Basile [38]
3 years ago
13

If the reaction yield is 88.2%,what mass in grams of hydrogen is produced by the reaction of 7.73 g of magnesium with 1.31 g of

water
Mg + 2h2o >>mg(oh)2+h2
Chemistry
1 answer:
ira [324]3 years ago
5 0

Answer:

Mass of hydrogen produced is 0.07g.

Explanation:

Given data:

Mass of magnesium = 7.73 g

Mass of water = 1.31 g

Reaction yield = 88.2%

Mass of hydrogen produced = ?

Solution:

Chemical equation:

Mg + 2H₂O     →   Mg(OH)₂ + H₂

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 1.31 g / 18 g/mol

Number of moles = 0.07 mol

Number of moles of magnesium:

Number of moles = mass/ molar mass

Number of moles = 7.73 g / 18 g/mol

Number of moles = 0.43 mol

Now we will compare the moles of water and magnesium with hydrogen.

                    Mg            :           H₂

                     1               :            1

                    0.43          :          0.43

                    H₂O          :             H₂

                      2             :              1

                   0.07           :            1/2×0.07 = 0.035

Mass of hydrogen:

Mass = number of moles × molar mass

Mass = 0.035 mol × 2 g/mol

Mass = 0.07  g

You might be interested in
What element is likely to form an ionic compound with chlorine?
kirill [66]
Sodium (NA)
the sodium atom is donating its 1 valence electron to the chlorine atom. This creates a sodium cation and a chlorine anion. Notice that the net charge of the resulting compound is 0.

5 0
3 years ago
Analizando una biomolécula X, un científico comprueba que está formada por Carbono, Hidrógeno, Oxígeno y Nitrógeno, además de li
Cloud [144]

Analyzing a biomolecule X, a scientist verifies that it is made up of Carbon, Hydrogen, Oxygen and Nitrogen, in addition to releasing water when it joins with other similar molecules to form polymers. Considering these antecedents, it can be inferred that biomolecule X corresponds to: A Steroids B fatty acid C nucleotide D amino acid E monosaccharide (for people who dont speak spanish)

ok you answer is probably A

if wrong C maybe

~hope~

6 0
3 years ago
Where does ATP store its energy?
RSB [31]

Answer:

D. ATP stores energy in its "tail," which is made from three phosphate groups.

Explanation:

ATP = 3 phosphates

ADP= 2 phosphates

AMP= 1 phosphate

4 0
3 years ago
I need help on question 3 true or false thxxx quick i’m timed
ruslelena [56]

Answer:

The answer is true.

5 0
3 years ago
Which of the following statements are true about elements and compounds?
Leto [7]
The answer is d hope this helps
3 0
3 years ago
Other questions:
  • What would be the difference in your weight (remember weight is the force of gravity acting on you) if you were 3 times further
    14·1 answer
  • 1) If calcium were to combine with the compound barium nitrate, which member of the barium nitrate would calcium replace?
    7·1 answer
  • The melting of wax is a physical change, yet the burning of wax is a chemical change. what is the essential difference between t
    14·1 answer
  • Which describes the molecule shown below? Image is above
    7·1 answer
  • Which term best indicates the average mass of an atom of an element?
    5·2 answers
  • Question 4
    14·1 answer
  • PLEASE HURRRYYYY
    14·1 answer
  • Whats the answer? please help me​
    8·1 answer
  • For each of the following circumstances, indicate whether the calculated molarity of NaOH would be lower, higher or unaffected.
    10·1 answer
  • What type of plant is thought to be the first plant?
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!