Multiple Choice 1. Which of the f 2. How many significant figures are in the mea
ID: 694732 • Letter: M
Question
Multiple Choice 1. Which of the f 2. How many significant figures are in the measurement 3. Which of the following does NOT describe a nonmetal? and corner of the periodic t tends to gain electrons a. table s are generall poorconductor of heat -3. Which of the following represent isotopes? C: X a. A and D b. A and C B and D d. C and D e. all of the above Determine the volume ofhexane that contains 5.33 × 1022 molecules of hexane. The density of hexane is 0.6548 g/mL and its molar mass is 86.17 g/mol 5. . 8.59 mL b. 13.5 mL c. 7.40 mL d. 12.4 mL e. 11.6 mLExplanation / Answer
1.
A hypothesis is a proposed explanation for an observable phenomenon. It can be proved or disproved. It is typically used in quantitative research and predicts the relationship between variables.
Remaining all are well authenticated explanations acquired through the scientific method and repeatedly tested and confirmed through observation and experimentation.
2. Answer 'C'
31.600
There are 5 significant figures. Trailing zeros that are not needed to hold the decimal point are significant (The last zero in a decimal is significant).
3. Answer 'd'
Most of the non metals are highly reactive except noble gases.
Remaining all other statements are correct regarding non metals.
4. The question number is wrong and all the options are wrong.
Correct answer is A & B
The nuclie having same mass number with different atomic numbers are isotopes.
5. Answer is 'e'
Number of moles of hexane = No of molecules/Avagadro number = (5.33 x 1022) /(6.023x 1023)
= 0.0885
weight of hexane = moles x molecular mass = 0.0885 x 86.17 = 7.626 grams
Volume of Hexane = weight/density = 7.626/0.6548 = 11.646 ml
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