Question

Float or Sink 1) Water has a density of approximately 1g/cm³. In fact 1 cm³ of water used to be the standard for a gram. Objects will sink if their density is greater than water and will float if their density is less. For the following problems, decide if the block will sink or float. a) A cube measuring 2 cm on each side weights 5 g, will it sink or float? b) A block has a mass of 20 g and measures 2cm X 4cm X 2cm, will it sink or float? 2) There are four rocks that all have the same volume of 10 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water? a) 30 grams b) 20 grams c) 12 grams d) 8 grams

          Float or Sink
1) Water has a density of approximately 1g/cm³. In fact 1 cm³ of water used to be the standard for a gram. Objects will sink if their density is greater than water and will float if their density is less. For the following problems, decide if the block will sink or float.
a) A cube measuring 2 cm on each side weights 5 g, will it sink or float?
b) A block has a mass of 20 g and measures 2cm X 4cm X 2cm, will it sink or float?
2) There are four rocks that all have the same volume of 10 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water?
a) 30 grams
b) 20 grams
c) 12 grams
d) 8 grams

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Float or Sink
1) Water has a density of approximately 1g/cm³. In fact 1 cm³ of water used to be the standard for a gram. Objects will sink if their density is greater than water and will float if their density is less. For the following problems, decide if the block will sink or float.
a) A cube measuring 2 cm on each side weights 5 g, will it sink or float?
b) A block has a mass of 20 g and measures 2cm X 4cm X 2cm, will it sink or float?
2) There are four rocks that all have the same volume of 10 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water?
a) 30 grams
b) 20 grams
c) 12 grams
d) 8 grams

Added by Tracy C.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Brooke Smith

09/16/2022

Step 1

Given: - Side length of cube = 2 cm - Mass of cube = 5 g Volume of cube = (side length)^3 = 2 cm * 2 cm * 2 cm = 8 cubic cm Density = Mass / Volume = 5 g / 8 cubic cm = 0.625 g/cm^3 ** Show more…

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Float or Sink Water has a density of approximately 1 g/cm³. In fact, 1 cm³ of water used to be the standard for a gram. Objects will sink if their density is greater than water and will float if their density is less. For the following problems, decide if the block will sink or float. a) A cube measuring 2 cm on each side weighs 5 g. Will it sink or float? b) A block has a mass of 20 g and measures 2 cm x 4 cm x 2 cm. Will it sink or float? There are four rocks that all have the same volume of 10 cubic centimeters. The mass for each of these rocks is given below. Which one of the four rocks will float when placed in water? a) 30 grams b) 20 grams c) 12 grams d) 8 grams

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Transcript

00:01 Right, so we know water has the density of one gram per cubic centimeter.

00:08 And we have a few things here.

00:10 We want to know if it'll sink or float.

00:13 So for the first one, we have a cube, and it's two centimeters on each side and weighs five grams.

00:18 So we are going to need to find the volume and use the mass that we're given to find the density.

00:23 So we know its mass is five grams, and we know its volume can be found from the measurements that we're given.

00:30 So cube means it's the same length on all three sides.

00:35 And to find the volume of cube, it's going to be length times width times height.

00:40 So here all of those numbers are two centimeters.

00:43 So it'll be two centimeters times two centimeters times two centimeters.

00:49 So what this comes out to is eight cubic centimeters.

00:56 And so then to find the density we'll take five grams divided by eight cubic centimeters.

01:02 And this will give us the density in grams per cubic centimeters.

01:05 So this comes out to 0 .625.

01:11 And if we compare this to water, we see that this density is smaller than the density of water.

01:18 And when the density is smaller than something, that means that object will float on the more dense thing.

01:23 So here this will float.

01:26 For b, we have a block that has a mass of 20 grams.

01:32 And here it has different measurements...

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