The atomic weight of antimony is 121.75 u. There are two naturally occurring isotopes of antimony. 121Sb has an isotopic mass of
120.9038 u and has a natural abundance of 57.25%.
What is the isotopic mass of the other isotope 123Sb?
a) 122.97 u
b) 122.88 u
c) 123.06 u
d) 122.93 u
e) 122.82 u
What is the isotopic mass of the other isotope 123Sb?
a) 122.97 u
b) 122.88 u
c) 123.06 u
d) 122.93 u
e) 122.82 u
1 answer:
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<h2>Answer:</h2><h2>The percentage of the family’s total annual electricity that is used to run the two air conditioners for the three summer months = 19.4 %</h2>
Explanation:
Average electricity consumed per month = 900 kWh
The family cools their house for three months during the summer with two window-unit air conditioners
The power consumed by one window-unit air conditioners = 350 kWh
The power consumed by two window-unit air conditioners = 350(2) = 700 kWh
Power consumed for two air conditioners for the three summer months = 700 (3) = 2100 kWh
Total power consumed for 1 year = 900 (12) = 10800kWh
The percentage of the family’s total annual electricity that is used to run the two air conditioners for the three summer months = = 19.4 %