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
Marianna [84]
3 years ago
6

Calculate the number of moles in a 14.5 gram sample of C4H10.

Chemistry
1 answer:
cricket20 [7]3 years ago
6 0
Moles= mass divided by molar mass
Molar mass= 12.01(4) + 1.01(10)
                 = 58.14g/mol

Moles=14.5g / 58.14g/mol
         =0.249

Therefore there are approx 0.249 moles in a 14.5g sample of C4H10
You might be interested in
I NEED HELP PLEASE, THANKS! BRAINLIEST :)
scoundrel [369]

The principle states that the lowest-energy orbitals are filled first, followed ... electron configuration The arrangement of electrons in an atom, molecule, or other ... and two valence electrons (electrons in the outer shell), respectively; because of this, ... mechanics, a certain energy is associated with each electron configuration.

5 0
3 years ago
Read 2 more answers
_________ are rocky materials mixed with very thick oil.
True [87]

Tar pits.

Need more help? Join our growing community here: https://questioncove.com/invite/098ZDB

4 0
3 years ago
Read 2 more answers
Which of the following is true about the gas we call “air.” (the atmosphere)
mafiozo [28]

Answer:

B. Composed of molecules relatively far apart.

Explanation:

The gas we call "air" has molecules that are relatively far apart.

4 0
3 years ago
Read 2 more answers
For the following reaction, the equilibrium constant Kc is 2.0 at a certain temperature. The reaction is endothermic. What do yo
jeyben [28]

Answer:

The correct answer is : 'the concatenation of NO will increase'.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

If the temperature is increased, so according to the Le-Chatlier's principle , the equilibrium will shift in the direction where increase in temperature occurs.

2NOBr(g)\rightleftharpoons 2NO(g) + Br_2(g)

As, this is an endothermic reaction, increasing temperature will add more heat to the system which move equilibrium in the forward reaction with decrease in temperature. Hence, the equilibrium will shift in the right direction.

So, the concatenation of NO will increase.

7 0
3 years ago
An emerald gemstone is an impure form of the mineral beryl, Be3Al2Si16O18. What is the percentage of silicon in the mineral?
solong [7]

Answer:

b. 54.9%

Explanation:

An emerald gemstone has the formula Be₃Al₂Si₁₆O₁₈. We can find the mass of each element in 1 mole of Be₃Al₂Si₁₆O₁₈ by multiplying the molar mass of the element by its atomicity.

Be: 3 × 9.01 g = 27.03 g

Al: 2 × 26.98 g = 53.96 g

Si: 16 × 28.09 g = 449.4 g

O: 18 × 16.00 g = 288.0 g

Total mass = 818.4 g

The mass percentage of silicon is:

(449.4 g / 818.4 g) × 100% = 54.91%

4 0
3 years ago
Other questions:
  • A certain ore is 29.9% nickel by mass. How many kilograms of this ore would you need to dig up to have 75.0 g of nickel?
    11·1 answer
  • What is the mol of 1 5 x 10^26
    12·1 answer
  • Why are hydrocarbons insoluble in water?
    14·1 answer
  • Which processes represent one chemical change in one physical change
    11·2 answers
  • When the following redox equation is balanced with smallest whole number coefficients, the coefficient for Sn(OH)3– will be ____
    9·1 answer
  • To prepare 100.0 mL of a 0.0525 M solution of NaCl in water, what mass of sodium chloride is needed? The
    8·1 answer
  • What is the charge of the chromium ion in the compound crf3?
    9·1 answer
  • 1. Write formulas for the binary ionic compounds formed between
    9·2 answers
  • The sun rotates on it axis once every:<br><br> 28 hours<br> 120 days<br> 25 days 9 hours
    12·1 answer
  • Haley recorded several notes in her lab journal about the experiment. Which of her notes below is an interpretation of the data
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!