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
zubka84 [21]
2 years ago
7

Would the calculated molar mass be higher, lower, or the same as the actual molar mass of the compound if the unknown contained

an insoluble impurity?.
Chemistry
1 answer:
Delicious77 [7]2 years ago
3 0

Answer:

higher

Explanation:

If it contains a impurity that is insoluble it won't dissolve completely, the solution would be smaller than it is supposed to be, when compared to a compound without such insoluble impurity. Molecular weight determination won't be accurate because the molecular weight obtained will be higher as a result of the fact that the mass of the solute would include the actual solute that is changing the temperature and the excess mass of the impurity.

You might be interested in
Percent composition of a compound (molar mass= 60.06) 39.99% C, 6.727% H, 53.33% O, What is the molecular formula of the compoun
abruzzese [7]

You are calculating the empirical formula of this chemical compound, which is the question with moles, molar mass, and number of moles.

We assume the total mass of this compound is 100g. Because 39.99 +6.727+53.33 =100.047is about 100g. That's the easiest way for us to do it.

First you divide the mass of carbon by its molar mass(relative formula mass)because there is a formula about moles state: number of moles=mass/molar mass.

So, 40/12 is about 3.3. Then, the RFM of H is 1, so the number of mole is 6.7/1=6.7. The RFM of O is 16, whihc means the molar mass od oxygen is 16g, so 53.3/16, which is about 3.3 too.Next, you get the number of moles in order is; 3.3, 6.7, 3.3. Now we need to look at the ratio between these numbers. 3.3 and 3.3 has a common factor of 1, so the subscript of them are both 1. next use 6.7/3.3, and the greatest common factor is 2, so the empirical formula is CH2O.

BUT CH2O is only the empirical formula. what we need to do is calculate the RFM of CH2O first.

So, 12+2+16=30.

Then we find out how many times 30 goes into 60.06; 60.06/30 is 2.002. we simplify it as 2.

Finally, all the subscript need to times 2. therefore the molecular formula is C2H4O2.

To solve this kind of  questions, there are many steps:Know what you are calculating about, it's about the MOLECULAR formula, so you need to find out the number of moles of each elements, then the empirical formula, then the molecular formula.

) Find the RFM of the element, because that is the molar mass(mass of 1 mole) of this element.

2) number of moles= mass/molar mass. use this formula to help you get the number of moles of each element in this compound

3) look at the relationship between the number of moles of each elements. find out the ratio between them.

4)use the molar mass of the whole compound to find out the molecular formula of this compounds. calculate the RFM of the compound in empirical formula form, and then divide the molar mass by the RFM.

if i got anything wrong, please tell me :)



6 0
3 years ago
Co(g) + 2 h2 --> ch3oh 2.50 g of hydrogen is reacted with 30.0 l of carbon monoxide at stp. 1. what is the limiting reactant?
Lemur [1.5K]
CO(g) +2H2--->CH3OH
2.50g H2*1mol/2g=1.25 mol H2
30.0L CO*1mol/22.4L=1.34 mol CO,
according to reaction 1 mol CO needs 2 mol H2,so 1.34 mol CO need 2.68 mol H2, so 1) limiting teactant is H2 (H)

2)1.25 mol CH3OH will be produced, 1.25 mol*32g/mol=40.0 g CH3OH
3) 1.25 mol H2 needs 0.625 g CO
1.34-0.625=0.715 g CO leftover

7 0
3 years ago
Read 2 more answers
Calculate how many moles of carbon dioxide are contained in 5.57 x 10²¹ molecules of CO₂
Alex777 [14]
<h2>Answer:  0.00925 mol </h2>

Explanation:

Moles = # of molecules ÷ Avogadro's Number  

         =  (5.57 × 10²¹ molecules) ÷ (6.022 × 10²³ molecules/mol)  

         =  0.00925 mol

<h3>∴ the 5.57 x 10²¹ molecules of carbon dioxide ≡ 0.00925 mol</h3>
3 0
2 years ago
Write the electronic configuration of calcium oxide ​
Nana76 [90]

Answer:

The electron configuration for calcium is: 1s2 2s2 2p6 3s2 3p6 4s2. Since calcium is in the fourth row and the second column of the s-block on the periodic table of elements, its electron configuration ends in 4s2. Every lower orbital is filled, starting with the 1s orbital.

Explanation:hope this helps

6 0
3 years ago
6. What is the mass of the object if the net force acting on it was 356 N and the acceleration rate
Marina86 [1]

The mass of an object with a net force of 356N and an acceleration rate of 4m/s² is 89kg.

<h3>How to calculate mass?</h3>

The mass of an object can be calculated using the following formula:

F = ma

Where;

  • F = force (N)
  • m = mass (kg)
  • a = acceleration (m/s²)

m = F/a

m = 356/4

m = 89kg

Therefore, the mass of an object with a net force of 356N and an acceleration rate of 4m/s² is 89kg.

Learn more about mass at: brainly.com/question/19694949

8 0
2 years ago
Other questions:
  • i have a question about atoms. How would i find electrons when the atomic number is the number of protons and electrons?
    6·1 answer
  • The height of a building is 31.0 meters.how tall is the building in kilometers?
    12·1 answer
  • When U-238 undergoes radioactive decay by losing an alpha particle, the other product is
    9·2 answers
  • Which chemical equation below is balanced correctly? Al4C3 + 12H2O yields 3CH4 + 4Al(OH)3 NaCl + CaO yields Na2O + CaCl2 3LiOH +
    7·1 answer
  • What is the difference between homogeneous mixture and heterogeneous mixture and examples​
    5·1 answer
  • A covalent bond is formed by the following process
    14·2 answers
  • __H₂ + __ O₂ → __ H₂O What type of reaction is above:
    12·1 answer
  • Explain the concept of molar mass.
    6·1 answer
  • An animal cell placed in a hypertonic solution will shrink in a process called crenation. An animal cell placed in a hypotonic s
    11·1 answer
  • Describe the process of melting of ice in terms of particles present​
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!