You are asked to determine the mass of a piece of copper using its reported density, 8.96 g/ml, and a 150-ml graduated cylinder.
first, you add 105 ml of water to the graduated cylinder; then you place the piece of copper in the cylinder and record a volume of 137 ml. what is the mass of the copper reported with the correct number of significant figures?
2 answers:
The mass of the copper reported with the correct number of significant figures : 290 grams
<h3></h3><h3>Further explanation </h3>Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
The unit of density can be expressed in g / cm³ or kg / m³
Density formula:
ρ = density
m = mass
v = volume
A common example is the water density of 1 gr / cm³
A piece of copper using its reported density, 8.96 g/ml
Volume changes in the graduated cylinder indicate the volume of a piece of copper
initial volume = 105
final volume = 137
volume change = 137-105 = 32 ml
So the mass :
mass = 8.96 g/ml x 32 ml
mass = 286.72 gram
In multiplication and division of significant numbers, the final results look at the least number of significant numbers.
Because the number 32 on the multiplication above has 2 significant numbers, the result of multiplication must also have 2 significant numbers
So 286.72 gram round up become 290 (2 significant number)
<h3>Learn more </h3>
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Keywords: density, mass, volume, a block of osmium
Answer:- Mass of copper piece is 290 gram.
Solution:- We know that, mass = density * volume
density of copper is given as 8.96 gram per mL.
Volume of copper piece is the rise change in volume.
Volume of copper piece = 137 mL - 105 mL = 32 mL
Let's multiply the volume by density to calculate the mass of copper:
mass of copper =
mass of copper = 286.72 g
Volume has two significant figures, so if we round the mass to two significant figures then it becomes 290 g.
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