« 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 264 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?

Certain topical medications such as clotrimazole and betamethasone are not approved for use in children younger than 12 years of age. They must be used very cautiously, as directed by a doctor, to treat any child. Children have a much greater response to topical steroid medications.

Did you know?

Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.

Did you know?

Medication errors are three times higher among children and infants than with adults.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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
The Structure of an Old Low-Mass Star The Structure of an Old Low-Mass Star
Air Mass Thunderstorms Air Mass Thunderstorms
Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body Change in Bone Mass over Time In your early years, more bone mass is added than lost in your body
Population Density versus Economic Growth Population Density versus Economic Growth
How many grams of tartaric acid, H2C4H4O6, (molar mass = 150.10 g) are needed to How many grams of tartaric acid, H2C4H4O6, (molar mass = 150.10 g) are needed to
Video: Medullary osmotic gradient - influencing factors

For a complete list of videos, visit our video library