7.6 is the answer for the question
Potential energy, because it is stored in the basic building block of all living organisms called cells and is only released when necessary for energy consuming work.
The number of B that will be needed to convert 5 moles of A into as many moles of C as possible is 20 moles
Explanation
3A + 12 B → 4 C
The moles of B is calculated using the mole ratio of A to B from equation above
that is the moles ratio of A:B = 3 : 12
Therefore the moles of B = 5 x12/3 = 20 moles
Answer:
The atomic mass of second isotope is 7.016
Explanation:
Given data:
Average Atomic mass of lithium = 6.941 amu
Atomic mass of first isotope = 6.015 amu
Relative abundance of first isotope = 7.49%
Abundance of second isotope = ?
Atomic mass of other isotope = ?
Solution:
Total abundance = 100%
100 - 7.49 = 92.51%
percentage abundance of second isotope = 92.51%
Now we will calculate the mass if second isotope.
Average atomic mass of lithium = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
6.941 = (6.015×7.49)+(x×92.51) /100
6.941 = 45.05235 + (x92.51) / 100
6.941×100 = 45.05235 + (x92.51)
694.1 - 45.05235 = (x92.51)
649.04765 = x
92.51
x = 485.583 /92.51
x = 7.016
The atomic mass of second isotope is 7.016
