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
Answer:
office work --> back injury
jobs in the retail sector --> injuries due to violent crimes
restaurant jobs --> burns
cleaning jobs in medical facilities --> blood-borne diseases
Explanation:
-note that these are just assumptions based on a few different things.
1) back injury, long hours sitting in one place in one position.
2) retail sector employees often have to face the act of stealing, and many criminals put up a fight when they are stealing something of value.
3)A lot of restaurant jobs involve time around appliances that give off heat like stoves, hot water, ovens, etc.
4) Blood-borne diseases are transmitted through blood, and many medical employees have to clean up that bloody mess, therefore they might catch something.
The phrase describes the formation of the Hawaiian islands is formed due formed at a convergent boundary.
<h3>What type of plate boundary is forming the Hawaiian Islands?</h3>
The Convergent plate boundaries is known to be subduction zones" and it is said to be the place where the Pacific Plate is said to be subducted by the North America Plate.
The phrase describes the formation of the Hawaiian islands is formed due formed at a convergent boundary.
Learn more about Hawaiian islands from
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The advice that will be given in the purchase of crystal candlestick is to go to
Betty's Breakables if the price is above $25.00.
In this scenario, we were told that Betty's Breakables offers 40% discount,
while Annie Attic offers $10 discount.
<h3>Calculation</h3>
Let's assume the price is $25.00, the discount at Betty's Breakables will be
= 40/100 × $25.00
= $10.
At Annie Attic, he was offered a $10 discount which is the same. However
there will be more gain on the discount if the price is above $25.
Let's assume the price is $30 , the discount will be $12 at Betty's Breakables
which is more than that at Annie Attic in which the discount remains at $10.
It is therefore cheaper to go to Betty's Breakable if the price of the
candlestick is above $25.
Read more about the Factors that influence pricing at brainly.com/question/17552787
