An atom has 5 protons and 7 neutrons. What is its mass number?
2 answers:
Mass number = No. of protons + No. of neutrons
= 5 + 7
= 12 u.
Thus, the answer is 12 u.
Mass number = protons + neutrons
mass number = 5 + 7
mass number = 12
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Answer:
V2 = 600ml
Explanation:
dilution principle formula
M1V1 = M2V2
C1V1 = C2V2
3 X 20 = 0.1 x V2
60 = 0.1 x V2
V2 = 60/0.1
V2 = 600ml
pls give brainliest
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