When 15.0 g of a metal is dropped into a graduated cylinder containing water, th

Question

When 15.0 g of a metal is dropped into a graduated cylinder containing water, the volume increases form 50.0 mL to 55.6 mL. Calculate the density of the metal. 0.14 g/mL 84 g/mL 0.27 g/mL 2.7 g/mL 0./30 g/mL Which of the following is a compound? P_4 O_2 P_2O_5 S_B All the 4 substances are compounds Do the following multiplication and express your answer to the right number of significant figures: 25.32 mL Times 0.968 g/mL 24.5 g 24.6 g 25.0 g 24.51 g Mercury melts of 234 K. What is the temperature in the Fahrenheit scale? -39 -3.9 -38 10

Explanation / Answer

Q13) Density of Metal = Mass of Metal/Volume of water displaced

=> 15/(55.5-50)

=>15/5.5

=> 2.72 gm/cm^3

Hence the correct answer is Option D

Q14) P2O5 is the only compound since it contains two atoms S and O, hence the correct answer is Option C

Q15) 25.32 * 0.968

=> 24.51 gms

Hence the correct answer will be Option A (24.5) since the answer must have 3 significant digits

Q16) 234K = -38.47F

Hence the correct answer is Option C

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