1) What is the density of a block of unknown material with a mass of 10.00-g if
ID: 1002756 • Letter: 1
Question
1) What is the density of a block of unknown material with a mass of 10.00-g if the dimensions are:
length = 2.2 cm
height = 1.7 cm
width = 2.2 cm
2) What is the density of a 17.25-g object if the dimensions of the block are:
length = 12.6 mm
height = 3.2 cm
width = 0.014 m
3) What is the density of a 22.00-g irregularly shaped object if the initial volume of water was 21.8-mL and the volume rose to 54.8-mL after the object was added?
4) A volume of water was delivered using a buret and experimentally determined to have a mass of 2.77-g. What was the final volume of water on the buret if the inital was 0.47-mL? [assume the density of water is 1.00g/mL]
5) Identify the following chemical using the information provided below:
initial buret reading: 1.2-mL
final buret reading: 10.5-mL
mass: 8.184-g
Explanation / Answer
1) Volume of the block = lwh = 2.2 cm(2.2 cm)(1.7 cm) =8.228 cm3
Density of the block = mass (g)/volume (cm3)
= 10.00g /8.228 cm3
= 1.215 g/cm3
---------------------------------------------------------------------------------------------------------------------------------------------------
2) Volume of the block = lwh = (12.6mm * 1cm/10mm)(3.2 cm)(0.014 m*100cm/1m) = 5.6448 cm3
Density of the block = mass (g)/volume (cm3)
= 17.25g / 5.6448 cm3
= 3.06 g/cm3
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
3) Volume of the object = 54.8 mL - 21.8 mL = 33mL *1 cm3/1mL = 33 cm3
Density = 22.00 g/ 33cm3 = 0.67 g/cm3
---------------------------------------------------------------------------------------------------------------------------------------------------
4) A volume of water was delivered using a buret and experimentally determined to have a mass of 2.77-g. What was the final volume of water on the buret if the inital was 0.47-mL? [assume the density of water is 1.00g/mL]
Density of water = 1.00 g/mL
1.00 g/mL = 2.77 g/ Volume (mL)
Volume = 2.77 g/ (1.00g/mL) = 2.77 mL
Volume of water transferred by the buretter = Vfinal -Vinitial = 2.77 mL
Vfinal - 0.47 mL = 2.77 mL
Vfinal = 2.77 +0.47 mL = 3.24 mL
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.