Typical seawater contains 2.7 g of salt (sodium chloride, NaCl) per 100 mL. What is the molarity of NaCl in the ocean? (The molecular mass of NaCl: 58.44 g/mol)
A. 0.13 M B. 0.92 M C. 0.46 M (Your Answer) D. 0.23 M (Correct Answer)
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Question. 35) Incorrect Points earned: 0 out of 3
ReplyDeleteTypical seawater contains 2.7 g of salt (sodium chloride, NaCl) per 100 mL. What is the molarity of NaCl in the ocean? (The molecular mass of NaCl: 58.44 g/mol)
A. 0.13 M
B. 0.92 M
C. 0.46 M (Your Answer)
D. 0.23 M (Correct Answer)
Moles of NaCl present = 2.7/58.44 = 0.046M
Molarity of Sea Water = 0.046/0.1 = 0.46M
Please check your answer
Yes, Prateek
ReplyDeleteyou are correct....
there seems to be some error in the assigned answer...
Correct answer is 0.46 M
Question 73 : What is the wavenumber equivalent to 400 nm wavelength :
ReplyDeleteA. 0.25 cm -1
B. 25000 cm -1 (Your Answer)
C. 2500 cm -1 (Correct Answer)
D. 0.0025 cm -1
1/400nm = 0.0025 X 10^7 cm-1
= 25000 cm-1.....??
Check your answer & Reply....
Yes,
ReplyDeleteyou are correct...
Answer is 25000 cm-1
Thanks for correcting us.
Proven online appointment-scheduling software can give administrators the peace of mind that their system is accurately and effectively booking and managing rooms, students and faculty members.STC Technologies
ReplyDelete