1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
nirvana33 [79]
1 year ago
15

A sample of a compound made entirely from copper and oxygen was found to have a total mass of 0.143 g the mass of copper in the

compound was found to be 0.1271 g calculate the mass of oxygen in the same. Also, Calculate the number of moles of oxygen in the sample. Please help!! Thank you in advance.
Chemistry
1 answer:
tensa zangetsu [6.8K]1 year ago
6 0

Mass of Oxygen: 0.0159 grams

Moles of Oxygen: 9.94x10^-4

To find the mass of oxygen, subtract the mass of copper from the total mass.

0.143-0.1271=0.0159

There are 0.0159 grams of Oxygen.

To find how many moles there are, divide the given amount of oxygen by the molar mass (atomic mass) of oxygen because that mass is the same as one mole of oxygen.

Molar mass of Oxygen: 16.00

0.0159/16.00=9.94*10^{-4}

There are 9.94*10^-4 moles of Oxygen.

You might be interested in
Why can people on one side of a room smell the scent of an air freshener sprayed on the opposite side?
Fittoniya [83]

Explanation:

what i would think is when u spray your air freshener it sprays molecules of that freshener the molecules dont just spray and go down there it spreads around the room and some of those molecules also enter ones nose and that is why he smells the freshener

i hope this is helps

3 0
3 years ago
How many atoms of cobalt are in one formula unit of cobalt (III) oxide? one two three six
IrinaK [193]
I believe the correct answer is the second option. There will be two cobalt atoms in one formula unit of cobalt (III) oxide. It has a chemical formula of Co2O3. This compound is does not naturally occur so it is being synthesized. It is mostly used as bleaching agent.
7 0
3 years ago
Read 2 more answers
Match the following names of glassware with what you would use them for.
Valentin [98]

Answer:

A) Graduated pipette – Glassware used to accurately transfer small volumes.

B) Volumetric pipette – Glassware used to accurately transfer a small, single volume.

C) Beaker – Glassware best used when greater access to the contents is needed.

D) Buret – Glassware used to deliver a volume not known in advance.

E) Erlenmeyer flask – Glassware used to prevent splashing or evaporation.

F) Volumetric flask – Glassware used to make accurate solutions.

Explanation:

Graduated pipette – Glassware used to accurately transfer small volumes.

A graduated pipette is a pipette, which has a scale that shows its volume marked along the tube. It is used to transfer small volumes accurately.

Volumetric pipette – Glassware used to accurately transfer a small, single volume.

A volumetric pipette is a pipette, which has a ring like marking that is its calibrated volume. So it is used to transfer a single and small volume only. This pipette is used in volumetric analysis.

Beaker – Glassware best used when greater access to the contents is needed.

Beaker is the most widely used glassware in the laboratory. They are used to transfer large volume with less accuracy. They are of different sizes depends on the size of volumes ranging from 10 mL to 1000 mL.

Buret – Glassware used to deliver a volume not known in advance.

Buret is the most important glassware in the quantitative analysis. It has a glass tube with scale which measures the volume and a stopcock at one end from which the solvent is dispersed. It is used to measure the volume of the liquid during the titration in the quantitative analysis.

Erlenmeyer flask – Glassware used to prevent splashing or evaporation.

The most common names of Erlenmeyer flask are conical flask and titration flask. This flask has flat bottom, conical body and cylindrical neck which prevent splashing and evaporation. This flask is used in the titration process in the quantitative analysis. The solvent from the buret is delivered into the conical flask during the titration process.

Volumetric flask – Glassware used to make accurate solutions.

The volumetric flask is also an important glassware in the analytical laboratory. It is used to prepare standard solutions. It is a flask which has a ring like marking that is its calibrated volume. The mentioned volume of volumetric flask is calibrated to have accurate volume.

3 0
3 years ago
Which of the following types of radiation can penetrate the most deeply into your body?
ivolga24 [154]

Answer:

gamma rays

Explanation:

6 0
4 years ago
Read 2 more answers
In a pedigree, when a circle of square is halfway shaded, is it
exis [7]
Ummm I think it is C. ( not sure)
6 0
3 years ago
Other questions:
  • When copper (ii) carbonate is heated if forms copper (ii) oxide and carbon dioxide?
    15·1 answer
  • Give an example of a physical property that is also a characteristic property
    14·1 answer
  • Which statement is true of the particles that make up a substance?
    12·1 answer
  • Which is more prevalent in the food we eat: carbon-12 or carbon-14?
    8·1 answer
  • Volume of carbon dioxide gas evolved at STP by heating 7.3 gram of Mg(Hco3)2 will be​
    9·2 answers
  • Question 1 (True/False Worth 2 points)
    14·1 answer
  • Can you have an ecosystem without plants? EXPLAIN YOUR ANSWER!!
    5·2 answers
  • For which of the following molecules or ions does the following description apply? "The bonding can be explained using a set of
    12·2 answers
  • In the presence of excess oxygen, methane gas burns in a constant-pressure system to yield carbon dioxide and water: CH4 (g) + 2
    6·1 answer
  • What is a male reproductive organ?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!