Question

1. A 25.0 g sample of each of three unknown metals (a,b,c) is added to 25.0 mL of water in three separate 50.0 mL graduated cylinders. The volume in the cylinders after addition of the metal is given below. Calculate the densities (g/mL) of each of the metals (a,b,c). Volume of metal + water Metal a: 28.7 mL Metal b: 26.4 mL Metal c: 27.9 mL 2. When finding the density of a solid, which situation prevents us from being able to accurately find the volume displacement? 3. The density of an object is 2.31 g/mL. The mass of this object is 0.89 g. What is the volume in mL? (Answer to two decimal places.) Please answer using abbreviated units, for example, mL, g, mol, g/mL. 4. Select all samples below that will sink in water at 25 °C. The density of water at 25 °C is 0.997044 g/mL. Brick (1.9 g/mL) Ice (0.92 g/mL) Glass (2.7 g/mL) Copper Wire (8.8 g/mL)

          1. A 25.0 g sample of each of three unknown metals (a,b,c) is
added to 25.0 mL of water in three separate 50.0 mL graduated
cylinders. The volume in the cylinders after addition of the metal
is given below. Calculate the densities (g/mL) of each of the
metals (a,b,c). 
Volume of metal + water
Metal a: 28.7 mL
Metal b: 26.4 mL
Metal c: 27.9 mL
2. When finding the density of a solid, which situation
prevents us from being able to accurately find the volume
displacement?
3. The density of an object is 2.31 g/mL. The mass of this
object is 0.89 g. What is the volume in mL? (Answer to two decimal
places.)
Please answer using abbreviated units, for example, mL, g, mol,
g/mL. 
4. 
Select all samples below that will sink in water at 25 °C. The
density of water at 25 °C is 0.997044 g/mL.
Brick (1.9 g/mL)
Ice (0.92 g/mL)
Glass (2.7 g/mL)
Copper Wire (8.8 g/mL)

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Added by Steven B.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Susan Hallstrom

07/21/2022

Step 1

1.1. Determine the volume of each metal by subtracting the initial volume of water (25.0 mL) from the final volume in the graduated cylinder. For Metal a: \[ \text{Volume of Metal a} = 28.7 \, \text{mL} - 25.0 \, \text{mL} = 3.7 \, \text{mL} \] For Metal b: \[ Show more…

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1. A 25.0 g sample of each of three unknown metals (a,b,c) is added to 25.0 mL of water in three separate 50.0 mL graduated cylinders. The volume in the cylinders after addition of the metal is given below. Calculate the densities (g/mL) of each of the metals (a,b,c). Volume of metal + water Metal a: 28.7 mL Metal b: 26.4 mL Metal c: 27.9 mL 2. When finding the density of a solid, which situation prevents us from being able to accurately find the volume displacement? 3. The density of an object is 2.31 g/mL. The mass of this object is 0.89 g. What is the volume in mL? (Answer to two decimal places.) Please answer using abbreviated units, for example, mL, g, mol, g/mL. 4. Select all samples below that will sink in water at 25 °C. The density of water at 25 °C is 0.997044 g/mL. Brick (1.9 g/mL) Ice (0.92 g/mL) Glass (2.7 g/mL) Copper Wire (8.8 g/mL)

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Transcript

00:01 In this one, i'm going to have to try to sort through some data here, so bear with me.

00:07 We're told we have a 25 grand sample of three metals, and our metals are a, b, and c.

00:26 We have 25 .0 milliliters of water in three 50 .0 -millacred cylinders.

00:40 The volumes of the cylinders after adding the metal are a, 28 .7, b, 26 .4, and c, 27 .9.

01:32 Find the density, calculate the density, which will always be calculated by taking mass divided by volume.

01:50 First of all, we're going to subtract 25 milliliters from each one of these to get the volume.

02:26 There's my volume.

02:33 Density equals mass divided by volume, and that will equal a 25 gram sample after the addition of the metal, volume of the metal plus water.

03:22 Boy, this doesn't make any sense at all.

03:24 I wonder if they gave me the right numbers.

03:29 I think so.

03:30 It says we have a 25 gram sample.

03:34 We had 25 milliliters of water.

03:36 Yep, that's right.

03:37 So we have 25 gram sample divided by 3 .7 milliliters.

03:43 25 gram sample divided by 1 .4 milliliters and a 25 gram sample divided by 2 .9 milliliters.

04:11 6 .7, 6 .8, 17 .9, 18.

04:33 8 .8.

04:44 And now if you want to go to three sig -figs on this, your answers would be 6 .77, 17 .9, and 8 .62.

05:15 I'm going to two sig -figs because of those values right there.

05:20 When finding the density of a solid, what situation prevents us from being able to accurately find.

06:07 The volume displacement...

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