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
a_sh-v [17]
2 years ago
15

In an experiment, a student was assigned to find the formula of an unknown hydrate that weighed 15.67g. The anhydrate, XCO3 (mol

ar mass = 84.32 g/mol), weighed 7.58 g after all the water was driven off. Determine the moles of water per one mole of anhydrate.
Chemistry
1 answer:
meriva2 years ago
6 0

Answer:

5.0 moles of water per one mole of anhydrate

Explanation:

To solve this question we must find the moles of the anhydrate. The difference in mass between the dry and the anhydrate gives the mass of water. Thus, we can find the moles of water and the moles of water per mole of anhydrate:

<em>Moles Anhydrate:</em>

7.58g  * (1mol / 84.32g) = 0.0899 moles XCO3

<em>Moles water:</em>

15.67g - 7.58g = 8.09g * (1mol / 18.01g) = 0.449 moles H2O

Moles of water per mole of anhydrate:

0.449 moles H2O / 0.0899 moles XCO3 =

5.0 moles of water per one mole of anhydrate

You might be interested in
This is a natural Landmark can vary greatly in size as a result of flooding and evaporation what is its correct name and locatio
nignag [31]
I believe it is the Great Plains in Nebraska.
4 0
2 years ago
How many moles are in 2.5L of 1.75 M Na2CO3
mixas84 [53]

Answer: There are 4.375 moles in 2.5 L of 1.75 M Na_2CO_3

Explanation:

To calculate the number of moles for given molarity, we use the equation:

\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}      

Molarity of solution = 1.75 M

Volume of solution = 2.5 L  

Putting values in equation , we get:

1.75M=\frac{\text{Moles of} Na_2CO_3}{2.5L}\\\\\text{Moles of }Na_2CO_3=1.75mol/L\times 2.5L=4.375mol

6 0
2 years ago
2. A chemical analysis of a sample provides the following elemental data:
Vadim26 [7]

Answer:

C3 H6 O2

Explanation:

first divide their mass by their respective molar mass, we get:

30.4 moles of C

61.2 moles of H

20.25 moles of O

now divide everyone by the smallest one of them then we get

C= 1.5

H= 3

O= 1

since our answer of C is not near to any whole number so we will multiply all of them by 2

so,

C3 H6 O2 is our answer

3 0
1 year ago
How much work does a gas do when it expands against a constant pressure of 0.600 atm from a volume of 50.00 mL to a volume of 44
miskamm [114]

Answer:

23.71J is the work that the gas do.

Explanation:

The work that a gas do under isobaric conditions follows the formula:

W = P*ΔV

<em>Where W is work in atmL, P is the pressure and ΔV is final volume -Initial volume In Liters</em>

Replacing with the values of the problem:

W = P*ΔV

W = 0.600atm*(0.44000L - 0.0500L)

W = 0.234atmL

In Joules (1atmL = 101.325J):

0.234atmL × (101.325J / 1 atmL) =

<h3>23.71J is the work that the gas do.</h3>

<em />

3 0
2 years ago
What does a cell do to a substance in Endocytosis
8090 [49]
Endocytosis is a type of bulk transport which involves the movement of large particles through the membrane in and out
3 0
3 years ago
Other questions:
  • In which biome would you find the main types of plant life to be grasses and nonwoody plants
    13·1 answer
  • How is salt water classified?
    9·1 answer
  • One mole of Ca is equal to how many atoms​
    15·1 answer
  • How many grams of nacl are required to make 500.0 ml of a 1.500 m solution?
    13·2 answers
  • HELP!!!!! URGENT!!!!!!!!!!!!!!!!!!!!!
    10·1 answer
  • In which type of chemical reaction do two or more substances combine to form one substance?
    10·2 answers
  • A solution has a pH of 2. Which best describes the solution? A strong acid, a strong base, a neutral solution, a weak base
    12·2 answers
  • A male construction worker regularly consumes 18 000 kJ of energy per day. Suggest the effects this could have on his health.
    13·1 answer
  • A bat wing is more similar in anatomical structure to a cat forelimb than to a bird wing. Answer the following questions about t
    11·1 answer
  • Perform the following
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!