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
Dennis_Churaev [7]
3 years ago
13

A hygroscopic compound readily absorbs water from the air. This water can be removed by gently heating the compound. 5.24 g of a

hygroscopic compound was heated to remove the absorbed water. After heating the dry compound had a mass of 4.16 g. What was the mass percent of water in the original compound?
Chemistry
1 answer:
olchik [2.2K]3 years ago
4 0

Answer:

This means 20.6% of the original hygrocopic compound is water

Explanation:

<u>Step 1:</u> Given data

A hygroscopic compound weighs 5.24 grams

To remove the absorbed water the compound is heated.

After the heating process, the compound weighs 4.16 grams

<u>Step 2:</u> Calculate the mass of the water

The total mass of the hygroscopic compound = mass of water + mass of dry compound

The mass of water = The total mass of the hygroscopic compound - mass of dry compound

The mass of water = 5.24 grams - 4.16 grams = 1.08 grams

<u>Step 3: </u>Calculate the mass percent of water in the original compound

1.08g / 5.24g *100% = 20.6%

<u>Step 4: </u>To control this we can calculate the mass percent of the dry compound

4.16g / 5.24g *100 % = 79.4%

20.6% + 79.4% = 100%

This means 20.6% of the original hygrocopic compound is water

You might be interested in
Please use the below balanced equation to answer this question.    2H2(g)  +  O2(g)  -&gt;   2H2O(l) How many grams of water wil
Blizzard [7]
At STP (standard temperature and pressure conditions), 1 mol of any gas occupies 22.4 L 
This rule is applied to O₂
22.4 L volume occupied by 1 mol
Therefore 83.4 L occupied by - 1/ 22.4 x 83.4 = 3.72 mol
stoichiometry of O₂ to H₂O is 1:2
then the number of moles of water produced - 3.72 mol x 2= 7.44 mol
mass of water produced - 7.44 mol x 18.01 g/mol = 134.1 g
correct answer is D

4 0
2 years ago
When two liquids are combined and form a solid (but didn't freeze) the solid that was formed is called
ludmilkaskok [199]
The answer is nucleation because can turn liquids into solids.
4 0
3 years ago
Why is it beneficial for chemists to understand as many periodic trends as they can?
Alexandra [31]

Answer:

It can help identify elements quicker.

Explanation:

3 0
3 years ago
List what you are thankful for! (It's Thanksgiving! Answer if you bake! Or if you like cakes pies cookies and treats!!! )
Naya [18.7K]

Answer:

I do not bake but my mom is a professional baker.  

Explanation:

A roof over my head and a warm home.

Plenty of drinkable water.

I don't have to go hungry.

I can enjoy the small and free pleasures of life.

Access to the internet.

My friends and family.

My health.

The kindness of people I have never met before.

8 0
2 years ago
Read 2 more answers
Combustion of hydrocarbons such as methane (CH) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Earths atmo
Sveta_85 [38]

Answer:

The balanced chemical reaction of combustion of methane is:

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

734 liters of carbon dioxide gas is produced. .

Explanation:

The balanced chemical reaction of combustion of methane is:

CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)

Mass of methane gas = 0.500 kg = 500 g (1 kg= 1000 g)

Moles of methane = \frac{500 g}{16 g/mol}=31.25 mol

According to reaction, 1 mole of methane gas gives 1 mole of carbon dioxide gas. Then 31.25 moles of methane will give :

\frac{1}{1}\times 31.25 mol=31.25 mol of carbon dioxide

Using ideal gas equation:

PV = nRT

where,

P = Pressure of gas = \1 atm

V = Volume of gas =?

n = number of moles of carbon dioxide gas = 31.25 mol

R = Gas constant = 0.0821 L.atm/mol.K

T = Temperature of gas =13.0°C=13.0+273.15 K= 286.15 K

Putting values in above equation, we get:

V=\frac{31.25\times 0.0821 atm L/mol K\times 286.15 K}{1 atm}

V = 734.15 L ≈ 734 L

734 liters of carbon dioxide gas is produced. .

3 0
3 years ago
Read 2 more answers
Other questions:
  • What volume (in L) of oxygen will be required to produce 77.4 L of water vapor in the reaction below?
    8·1 answer
  • 125mm hg into atmosphere
    14·1 answer
  • Which are examples of science rather than pseudoscience? Check all that apply. People can get rid of hiccups by holding their br
    11·1 answer
  • How is protenin in milk broken down in our digestive system​
    10·1 answer
  • How would an increase in carbon dioxide concentration in the atmosphere change the green house effect? A. Carbon dioxide would c
    8·1 answer
  • Can somebody help me please
    13·1 answer
  • Arrange the species according to the oxidation state of nitrogen in each. Note that highest refers to the most positive oxidatio
    12·1 answer
  • Which statement is true of a
    9·1 answer
  • How many lone pairs are on the central atom of a molecule of RnCl4?
    9·1 answer
  • Name this compound (ignore Stereocenter)<br>​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!