{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lec 02 24-8-05

# Lec 02 24-8-05 - 1 2 1 1 mg 2 1 g 3 1 pg 2 Density defined...

This preview shows pages 1–2. Sign up to view the full content.

1 1. 1 mg 2. 1 μg 3. 1 pg 2 2. Density – defined as the amount of mass in a unit volume a. elements range: from Li d = 0.53 g/cm 3 to Os d = 22.6 g/cm 3 Notice the density has units of g/cm 3 or g/mL 1 mL = 1 cm 3 = 1 cm x 1 cm x 1 cm mass volume density = 3 b. Pr. Ex. 1.4b, BLB p 20 A student needs 15.0 g of ethanol for an experiment. If the density of ethanol is 0.789 g/mL, how many milliliters of ethanol are needed? 4 IV Uncertainty in Measurement – we’ll develop this in lecture as needed V Dimensional Analysis – (1.6 in BLB) – the subject of aridus laboratory exercise 1 5 1.28 (a) A cube of osmium metal 1.500 cm on a side has a mass of 76.31 g at 25˚C. What is the density in g/cm 3 at this temperature? Will osmium metal float on water? (Materials that are less dense than water will float.) (b) The density of titanium metal is 4.51 g/cm 3 . What mass of titanium displaces 65.8 mL of water at 25˚C? (c) The density of benzene at 15˚C is 0.8787 g/cm 3 . Calculate the mass of 0.1500 L of benzene at this temperature?

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern