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
The center of the circle is the point (-2, 3) and the radius is 3 units.
<h3>
How to identify the center and radius?</h3>
Here we have the equation:
We can rewrite it as:
Now, we can add and subtract 4 and add and subtract 9, so we get:
So the center of the circle is the point (-2, 3) and the radius is 3 units.
If you want to learn more about circles:
brainly.com/question/1559324
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- It’s ironic because just a second ago, he was saying Rosaline was so beautiful.
- It’s ominous because Juliet is his enemy, so something bad will happen.
Answer:
I'm not so sure but maybe there's a chance that the person set up the settings on his device that way...
Answer:
Glucose moves with the concentration gradient from high to low concentration using a membrane protein.
Explanation:
Facilitated transport is a type of passive transport where the molecules move from region of high concentration to low concentration. Since they are moving along the concentration gradient, energy is not required for the process. But it does require some special membrane proteins hence the term "facilitated". The proteins are required for movement of large and polar molecules because even their diffusion is difficult through the non polar lipid layer of membrane.
Here, glucose is moving from high to low concentration so it's diffusion but it is using membrane protein because it is polar hence it is facilitated diffusion transport.
HOPE IT HELPS! :D
