Snapsolve any problem by taking a picture.
Try it in the Numerade app?

This problem has been solved

You'll get a detailed solution from a subject matter expert that helps you learn core concepts.

Question

The density of zinc is $455 \mathrm{lb} / \mathrm{ft}^3$. Find the mass in grams of $9.00 \mathrm{~cm}^3$ of zinc.

   The density of zinc is $455 \mathrm{lb} / \mathrm{ft}^3$. Find the mass in grams of $9.00 \mathrm{~cm}^3$ of zinc.

College Chemistry

College Chemistry

Jerome Rosenberg,… 9th Edition

Chapter 1, Problem 18

Instant Answer

Step 1

- Density of zinc: 455 lb/ft³ - Volume of zinc: 9.00 cm³ - We need to find the mass in grams. Show more…

Show all steps

lock

Susan Hallstrom and 65 other educators are ready to help you.

Ask a new question

Recommended Videos

Transcript

00:01 We're going to be considering brass which is a copper zinc alloy.

00:11 Okay, so what we're going to find what is mass in grams of a brass cylinder that it has a length of 1 .62 inches a diameter of 0 .514 inches it is 67 if it's 67 percent 67 .0 let's get the sig figs in there which one copper and 33 .0 percent zinc by mass the density of copper is 8 .92 grams per cubic centimeter and the density of zinc is 7 .14 grams per cubic centimeter and we're going to assume that it varies linearly the density varies linearly okay this one shouldn't be too hard to do um let me go ahead and highlight we've got 1 .62 inches length and we've got this is our diameter this this this and this okay so let's call these l let's call this d and these are percents those are pretty easy and that okay so first we're going to find the volume of the cylinder which will be equals pi d squared l over four so this will equal pi times 0 .514 inches squared times 1 .62 inches divided by four i'm going to see if my other calculator i unplugged it shoot i don't know what happened here okay but it's dark in where i'm working now it's raining outside so i'm doing my math and i get 0 .33615 inches cubed okay so we're going to have to get this to centimeters cubed because of our densities so we're going to take this times 2 .54 we'll have to cube this whole thing take this number times 2 .54 math down down enter enter and i get 5 .5085 cubic centimeters okay so now the volume of our copper plus the volume of our zinc is going to equal 5 .5085 cubic centimeters so let's figure out the mass of copper and that's going to be 0 .670 times x and the mass of our zinc will be expressed as 0 .330 times x okay and we know that the density of copper will equal its mass divided by its volume and it's 8 .92 grams per cubic centimeter and we know that v1 our volume will be equal to our mass divided by 8 .92 and that will equal 0 .670 x over 8 .92...

Previous Question