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
Dimas [21]
3 years ago
6

How many moles are 7 grams of calcium oxide? (Atomic mass of Calcium - 40 u, oxygen-16 u)​

Chemistry
1 answer:
White raven [17]3 years ago
8 0

Answer:

0.125

Explanation:

no of moles = given mass / molar mass

no of moles = 7/

molar mass of calcium oxide = atomic mass of calcium + oxygen

molar mass = 40 + 16

molar mass = 56

no of moles = 7/ 56 = 1/8 = 0.125

You might be interested in
How does monochlorination work? Please describe with an exampel.
Sunny_sXe [5.5K]

We have to explain monochlorination.

Monochlorination is the process to introduce one chlorine atom in any organic compound.

Generally, monochlorination takes place by replacement of proton from organic compound. To do chlorination, Cl₂ or HCl is used as reagent.

Inntroduction of  one Cl-atom in any organic molecule takes place through free radical mechanism.

The monochlorination of benzene is shown here:


6 0
3 years ago
Consider the Van der Vaals equation of state: (????+????????????)(????−????)=???????????? where p is pressure, V is volume, n is
yanalaym [24]

Answer:

Units of a = \frac{atm\ L^2}{mol^2}

Units of b = \frac{L}{mol}

Explanation:

The Van der Waal's equation  is:-

\left(P+\frac{an^2}{V^2}\right)\left(V-nb\right)=nRT

Where,

P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value

a and b are van der Waal's constant

If pressure is taken in atm and volume in L. So,

P+\frac{an^2}{V^2} represents the pressure correction term. Then,

Units of a = \frac{atm\ L^2}{mol^2}

V-nb represents the volume correction term. Then,

Units of b = \frac{L}{mol}

6 0
3 years ago
What is the collection of protons and neutrons in the center of an atom called
sdas [7]

If I am correct it should be nucleons


8 0
3 years ago
Read 2 more answers
Balance this equation please.
forsale [732]
2K + 2H2O = 2KOH + H2
6 0
3 years ago
Read 2 more answers
What volume (in L) of oxygen will be required to produce 77.4 L of water vapor in the reaction below?
Nostrana [21]

Answer:

For the production of 77.4 L water 90.3 L oxygen is required.

Explanation:

Given data:

Volume of oxygen required = ?

Volume of water produced = 77.4 L

Solution:

Chemical reaction equation:

2C₂H₆ + 7O₂  →  4CO₂ + 6H₂O

1 mole = 22.414 L

There are 6 moles of water = 6×22.414 = 134.5 L

There are 7 moles of oxygen = 7×22.414 = 156.9 L

Now we will compare the litters of water and oxygen:

                              H₂O           :              O₂    

                              134.5         :              156.9

                                77.4         :             156.9/134.5×77.4 =90.3 L

So for the production of 77.4 L water 90.3 L oxygen is required.

8 0
3 years ago
Other questions:
  • A hydrogen atom can be in the 1S state, whose energy we'll call 0, the 2S state, or any of 3 2P states. The 2S and 2P states hav
    15·2 answers
  • What is the name of the force exerted by blood on the walls of arteries
    14·1 answer
  • How do the properties of table salt compare with those of sodium and chlorine?
    7·1 answer
  • Help please..................
    6·1 answer
  • 4. The left brain does all of the following EXCEPT_
    10·1 answer
  • According to the bohr model, how do electrons move in atoms?
    12·1 answer
  • Vocabulary-what is a fossil
    10·2 answers
  • Identify and name the functional group present<br> CH4
    8·1 answer
  • Advertisements for tobacco and alcohol products work because they "tell the truth."
    7·2 answers
  • What is the formation of gas is an example of?​
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!