« previous next »

Author Question: A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What is the density of the ... (Read 262 times)

BrownTown3

  • Hero Member
  • *****
  • Posts: 564
on: Aug 27, 2018
A wooden object has a mass of 10.782 g and occupies a volume of 13.72 mL. What is the density of the object determined to an appropriate number of significant figures?
 
  A) 8  10-1 g/mL
  B) 7.9  10-1 g/mL
  C) 7.86  10-1 g/mL
  D) 7.859  10-1 g/mL
  E) 7.8586  10-1 g/mL

Question 2

Calculate the percentage by mass of oxygen in Pb(NO3 )2.
 
  A) 9.7
  B) 14.5
  C) 19.3
  D) 29.0
  E) 33.4
Chemistry: The Central Science ¦ Brown, LeMay, Bursten ¦ 14th Edition
Buy Test-Bank


bob

  • Sr. Member
  • ****
  • Posts: 343
Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

D


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Of the estimated 2 million heroin users in the United States, 600,000–800,000 are considered hardcore addicts. Heroin addiction is considered to be one of the hardest addictions to recover from.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

Did you know?

Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.

Did you know?

Despite claims by manufacturers, the supplement known as Ginkgo biloba was shown in a study of more than 3,000 participants to be ineffective in reducing development of dementia and Alzheimer’s disease in older people.

An old wooden cart, piled with rabbit skins, in New South Wales, Australia An old wooden cart, piled with rabbit skins, in New South Wales, Australia
An “Intermediate-Mass” Black Hole An “Intermediate-Mass” Black Hole
What is the mass of 1.20 x 1024 molecules of sulfur dioxide, SO2? What is the mass of 1.20 x 1024 molecules of sulfur dioxide, SO2?
Cocaine, C17H21NO4, in urine can be confirmed by mass spectroscopy at a concentration of 150 ... Cocaine, C17H21NO4, in urine can be confirmed by mass spectroscopy at a concentration of 150 ...
Estimating Potential Blood Volume Loss (Part 1) Estimating Potential Blood Volume Loss (Part 1)
He element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of ... He element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of ...
Video: PET Scan Animation

For a complete list of videos, visit our video library