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
B. diminished food supply, if there is no sustenance a group is forced to relocate for survival.
Influence because of the main focus on one topic
Answer:
so probability none of these vehicles requires warranty service is 0.389416
Explanation:
given data
new vehicles require warranty service π = 9 % = 0.09
sold nissan n = 10
solution
As we know here binomial probability formula that is
P(x) = 
......................1
so we use here combination formula that is
.................2
so probability none of these vehicles requires warranty service is
P(0) = 
P(0) = 
P(0) = 0.389416
so probability none of these vehicles requires warranty service is 0.389416
1. The correct statement that describes a Redox reaction is ( D ) ; A chemical reaction in which electrons are transferred between reactants.
2. The chemical formula that shows the correct subscripts is ( D ) BeF₂
3. The type of reaction that is shown is ; ( C ) decomposition reaction
A Redox reaction ( oxidation-reduction reaction ) involves the exchange/transfer electrons between reactants and the change in the oxidation number of the molecules involved in the reaction changes when an electron is either gained or lost.
Given that the Be has four ( 4 ) electrons and Fluorine has nine ( 9 ) electrons when they combine Fluorine will be left with an excess of electrons therefore the correct chemical formula will be BeF₂
The breaking up of an element into its smaller parts in a chemical reaction is known as a decomposition reaction.
