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According to the reaction represented above, about how many grams of aluminum (atomic mass 27 g) are necessary to produce 0. 50

liq [111]

Answer:

Taking into account the reaction stoichiometry, the correct answer is option B): 9 grams of aluminum are necessary to produce 0.50 mol of hydrogen gas at 25°C and 1.0 atm.

Explanation:

The balanced reaccion is:

6 HCl + 2 Al → 2 AlCl₃ + 3 H₂

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

HCl: 6 moles

Al: 2 moles

AlCl₃: 2 moles

H₂: 3 moles

The atomic mass of aluminum is 27 g/mole. Then, by reaction stoichiometry, the following mass quantity of aluminum participates in the reaction:

Then you can apply the following rule of three: if by reaction stoichiometry 3 moles of H₂ are formed from 54 grams of Al, 0.50 moles of H₂ are formed from how much mass of Al?

mass of Al= 9 grams

In summary, the correct answer is option B): 9 grams of aluminum are necessary to produce 0.50 mol of hydrogen gas at 25°C and 1.0 atm

5 0

2 years ago

What mass of glucose (C6H12O6) should be dissolved in 12. 0 kg of water to obtain a solution with a freezing point of -5. 8 ∘C?.

bogdanovich [222]

The mass of glucose solute dissolved in the solution is 6.739 Kg.

Recall that;

ΔT = K m i

ΔT = Freezing point depression

K =Freezing point depression constant = 1.86°C/mol

m = molality of the solution

i = Van't Hoff factor = 1 (molecular solution)

We have to find the freezing point depression from;

Freezing point depression = Freezing point of pure solvent - Freezing point of solution

Freezing point of pure water = 0°C

Freezing point of solution = -5. 8 ∘C

Freezing point depression = 0°C - (-5. 8 ∘C) = 5. 8 ∘C

Now;

m = ΔT/K i

m = 5. 8 ∘C/ 1.86°C/mol × 1

m = 3.12 m

But molality = number of moles of solute/mass of solvent in Kg

Molar mass of solute = 180 g/mol

Let the mass of solute be m

3.12 = m/180/12

3.12 = m/180 × 12

m = 3.12 × 180 × 12

m = 6739 g or 6.739 Kg

Learn more: brainly.com/question/6249935

8 0

3 years ago

Read 2 more answers

Which of the following describes behavioral genetics?.

fomenos

Genetics is known to be a broad topic that covers all aspect of human behavior. The statement that describes behavioral genetics is that the study of genetic characteristics on behavioral expressions.

Behavior genetics is commonly described as psychogenetic. This is simply known to be the study of the effect of an organism’s genetic composition on its behavior.

It also look at the relationship that exist between heredity and environment as it influence behavior. By careful study of genetic influence, one can know how the environment operations influence behavior.

Learn more about behavioral genetics from

brainly.com/question/7904501

5 0

3 years ago

When a man is permitted to marry more than one woman at a time.

Rina8888 [55]

A man is never permitted to marry more then one woman at a time

3 0

3 years ago

On a straight horizontal track along which blocks can slide with negligible friction, block 1 slides toward block 2, which is in

kiruha [24]

The additional measurements which must be made to determine the momentum of block 2 after the collision is both the mass and the post-collision speed of block 1

<h3>What is momentum?</h3>

Momentum can be defined as a scalar quantity that involves the multiplication of the mass of an object by its velocity.

In Physics, the momentum of an object such as a block, is calculated by using this formula;

Momentum = mass × velocity

In conclusion, we can deduce that the additional measurements which must be made to determine the momentum of block 2 after the collision is both the mass and the post-collision speed of block 1.

Read more on momentum here: brainly.com/question/15517471

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5 0

3 years ago