Answer:
3 moles of 
is needed for 
to be fully consumed.
Explanation:
For the balanced equation:
⇒ 
First, find the moles of Na corresponding to the 69g used the general definition of mol:
We observe that the equation is balanced and the stoichiometric ratio between them is 1: 1.
According to this, one mole of Na will react with one mole of Cl.
3 moles of is needed for to be fully consumed.
Answer:
0.20 moles
Explanation:
In order to solve this problem it is necessary to keep in mind the definition of molarity:
- Molarity = moles / liters
If we<u> input the data given by the problem</u> we're left with:
Meaning that we can proceed to <u>calculate the number of moles</u>:
Answer: The abundance of Li-7 isotope is higher as compared to Li-6.
Explanation:
Average atomic mass is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
We are given:
Two isotopes of lithium :
Li-6 and Li-7
Average atomic mass of lithium= 6.941
As, the average atomic mass of lithium is closer to the mass of isotope Li-7. This means that the relative abundance of Li-7 is higher as compared to Li-6.
Percentage abundance of Li-7> Percentage abundance of Li-6 isotope
Answer:
The answer is D.
Explanation:
Silver consists of 92.5% silver, and the remaining part is copper. ... Pure silver is not susceptible to tarnish in a pure oxygen environment. However, the copper that is contained in 925 sterling silver may react to the ozone and hydrogen sulfide in the air and cause sterling silver to tarnish.
Answer:
An aqueous solution in the blood that helps to regulate pH is called buffer solution.
Explanation:
Buffer solution is a specific type of solution which able to resist the pH change when small amount of acid or base is added to it.There are various buffer system present inside our body that helps to regulate the pH of our body.
The clinical contidition in which the blood pH is above is 7.45 is called alkalosis it can be overcome by addition of required amount of acid or H+ ion to neutralize to excess base.
For example during alkalosis the CO2 that is produced during cellular respiration reacts with water to generate carbonic acid(H2CO3) which will help to neutralize the excess base to maintain the normal pH of the blood.
