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Alecsey [184]
3 years ago
10

CARDS

Chemistry
1 answer:
mojhsa [17]3 years ago
5 0
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Aluminium reacts with sulfuric acid to form aluminium sulfate and hydrogen. What is the volume of
VashaNatasha [74]

Answer:

2al + 3h2so4 =  > al2(so4)3 + 3h2 \\ eqvt \\  =  >  \frac{5.4}{27}  = >   \frac{5 \times 50}{1000}  \\ .2 \: mol =  > .25 \: mol \\  \\ so \: .25 \: is \: limiting \: reagent \\ according \: to \: ideal \: gas \: equation \\ pv = nrt \\ v =  \frac{nrt}{p}  \\ v =  \frac{.25 \times .082 \times 300}{1}  \\  =  \frac{1}{4}  \times 8.2 \times 3  \\  = 2.05 \times 3 \\  = 6.15litre \\ thank \: you

7 0
3 years ago
The electrolysis of water forms H2 and O2.
Monica [59]

Answer:

67.5% ≅ 67.6%

Explanation:

Given data:

Mass of water = 17.0 g

Mass of oxygen produced  (actual yield)= 10.2 g

Percent yield of oxygen = ?

Solution:

Chemical equation:

2H₂O   →   2H₂ + O₂

Number of moles of water:

Number of moles = mass/ molar mass

Number of moles = 17.0 g/ 18.016 g/mol

Number of moles = 0.944 mol

Now we will compare the moles of oxygen with water to know the theoretical yield of oxygen.

                        H₂O       :        O₂

                          2          :         1

                        0.944      :      1/2×0.944 = 0.472 mol

Mass of oxygen:

Mass = number of moles× molar mass

Mass = 0.472 mol × 32 g/mol

Mass = 15.104 g

Percent yield:

Percent yield = [Actual yield / theoretical yield] × 100

Percent yield = [ 10.2 g/ 15.104 g] × 100

Percent yield = 0.675 × 100

Percent yield = 67.5%

5 0
3 years ago
Read 2 more answers
Which of these would most likely be considered a pure substance?
Karolina [17]

Answer:

c. Water Vapour

Hope it helps.

5 0
3 years ago
Read 2 more answers
How many liters of water would you need to add to 4.36 moles of NaCl to create a 9.4 M solution?
marishachu [46]

Answer:

0.464 L

Explanation:

Molarity (M) = number moles (n) ÷ volume (V)

According to the information given in this question:

number of moles (n) = 4.36 moles

Molarity = 9.4M

Volume = ?

Using M = n/V

9.4 = 4.36/V

9.4V = 4.36

V = 4.36/9.4

V = 0.464 L

Hence, 0.464L of water are needed the volume of water.

3 0
3 years ago
How is electronegative related to covalent bonding?
serg [7]
Electronegativity is related to covalent bonding because when two atoms have the same electronegativity bond, they will form a pure covalent bond.
5 0
4 years ago
Read 2 more answers
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