Chemistry :(?

[匿名]

2015-09-16 6:04 am

Part A.
A graduated cylinder contains 27.0 mL of water. What is the new water level after 32.0 g of silver metal is submerged in the water?
Part B.
A thermometer containing 4.6 g of mercury has broken. What volume of mercury spilled?
Express your answer using two significant figures.
Part C
A fish tank holds 34.0 gallons of water. How many pounds (lb) of water are in the fish tank?
Express your answer using two significant figures.
Part D.
The mass of an empty container is 87.00 g . The mass of the container and a liquid with a density of 0.758g/mL is 152.25 g . What is the volume (mL) of the liquid in the container?
Express your answer using three significant figures.
Part E
An iron object has a volume of 115 cm3 . If iron has a density of 7.86 g/cm3 , what is the mass, in kilograms, of the object?
Express your answer using three significant figures.

回答 (1)

DCM5150

2015-09-16 7:32 am

✔ 最佳答案

A: You need the density of silver
B: You need the density of mercury
C: You need the density of water
D; Subtract the mass of the empty container from the mass of the filled container and then you have the mass of the liquid. D = M/V or V = M/D so take your calculated mass and divide by the given density.
E: M = D x V so multiply the given volume by the given density. This will give you grams of iron. then convert that to kilograms.

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