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
HACTEHA [7]
3 years ago
6

After completing an experiment to determine gravimetrically the percentage of water in a hydrate, a student reported a value of

38 percent. The correct value for the percentage of water in the hydrate is 51 percent. Which of the following is the most likely explanation for this difference?
a) Strong initial heating caused some of the hydrate sample to splatter out b) The dehydrated sample absorbed moisture after heating c) The amount of the hydrate sample used was too small d) The crucible was not heated to constant mass before use e) Excess heating caused the dehydrated sample to decompose
Chemistry
1 answer:
SIZIF [17.4K]3 years ago
6 0

Answer:

b) The dehydrated sample absorbed moisture after heating

Explanation:

a) Strong initial heating caused some of the hydrate sample to splatter out.

This will result in a higher percent of water than the real one, because you assume in the calculation that the splattered sample was only water (which in not true).

b) The dehydrated sample absorbed moisture after heating.

Usually inorganic salts may absorbed moisture from the atmosphere so this will explain the 13% difference between calculated water percent the real content of water in the hydrate.

c) The amount of the hydrate sample used was too small.

It will create some errors but they do not create a difference of 13% difference as stated in the problem.

d) The crucible was not heated to constant mass before use.

Here the error is small.

e) Excess heating caused the dehydrated sample to decompose.

Usually the inorganic compounds are stable in the temperature range of this kind of experiments. If you have an organic compound which retain water molecules you may decompose the sample forming volatile compounds which will leave crucible so the error will be quite high.

You might be interested in
What is the result at the end of meiosis II?
VMariaS [17]

Answer:

B.) two diploid cells

6 0
3 years ago
Two or more velocities added by......​
alexdok [17]

speed and direction in which an object is moving. both speed and direction of motion. is a vector. two or more velocities add by velocity addition.

5 0
3 years ago
How to differ mixture and compound? What are their differences? ​
Roman55 [17]

Explanation:

"Compound: A substance that is made up of more than one type of atom bonded together. 

Mixture: A combination of two or more elements or compounds which have not reacted to bond together; each part in the mixture retains its own properties."

- Libre Texts

8 0
2 years ago
Read 2 more answers
According to South Erie, all sales carry out the function needed to sustain life. That means all sales must contain one accordin
soldier1979 [14.2K]

Cell theory states that all the living organisms are made up of basic structural and functional units, cells. All cells divide and give rise to new cells. All the cells have similar chemical composition. The nuclei acid DNA present in the chromosomes helps in carrying hereditary information from generation to generation. So, in order to sustain life the cells must contain DNA either enclosed in the nucleus or freely floating in the cytoplasm.

4 0
3 years ago
1. Which of the following would likely form a heterogeneous mixture? (Points : 3)
Nata [24]
For the answer to the question above asking w<span>hich of the following would likely form a heterogeneous mixture?

The answer would be</span> <span>sand and water
other choices like
,baking soda salt and sugar are soluble in water and form homogeneous solution</span>
6 0
3 years ago
Read 2 more answers
Other questions:
  • Help me I am stuck in science, click on this
    14·2 answers
  • What is the a property of a base
    7·2 answers
  • The fluid in a barometer (shown above) is mercury, Hg. Why point
    5·1 answer
  • The volume of a sample of gas measured at 27 °C is 10.0 dm . What is the temperature when the volume is reduced to 9.0 dm at the
    11·1 answer
  • The metal lithium has a diagonal relationship with the metal magnesium. true or false.
    9·1 answer
  • three of the following are base units used in the metric system. which is not a base unit? meter liter kilogram gram
    5·1 answer
  • Which of the following describes a use of thermal energy? * A heater warming a room A flashlight shining on a wall A football fl
    5·1 answer
  • The Law of Superposition states
    9·1 answer
  • The current gold price is $1795 per troy ounce. what is the price of one pound of gold?
    12·1 answer
  • How you would go about separating a mixture of salt and sand. Knowing that salt will dissolve in water. Device a method to separ
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!