Answer:
69.7173 u
Explanation:
The abundance of the first isotope is =60.40%
So the abundance of the second isotope =100%-60.40%=39.6%
Atomic mass of first isotope = 68.9257
So the average atomic mass of the first isotope =68.9257×0.6040=41.6311 u
Atomic mass of the second isotope =70.9249 u
So average atomic mass of second isotope =70.9249×0.396=28.086
Now the average atomic mass =41.6311+28.086=69.7173 u
HEY THERE !!
It is called SUBLIMATION.
so the correct answer is (D).
Answer:
Number of gallons =2 gallon
Explanation:
given data:
rate of gasoline ineurope = 5 euro per liter
total money to buy gasoline = 40 euro
total gasoline an american can buy in europe 
= 8 litres of gasoline
As given in the question 1 ltr is 1 quarts therefore
Total no. of quarts is 8 quarts
As from question 4 quarts is equal to one gallon, hence
Number of gallons