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
algol13
3 years ago
8

Convert 56.78 grams of Ca(OH)_2 to moles

Chemistry
1 answer:
ki77a [65]3 years ago
6 0

Answer: 0.77 mole

Explanation:

Atomic mass of Ca = 40g/mol

Atomic mass of O = 16g/mol

Atomic mass of H = 1

Therefore,

1 mole of Ca(OH)_2 contains

40+[16+1]2

= 40+34

=74g/mole

Hence,

1 mole of Ca(OH)_2 = 74g

Let x mole of Ca(OH)_2 = 56. 78

x = 56.78/74

x = 0.77 mole

You might be interested in
An electrically neutral atom of oxygen has eight electrons. What other facts do you know for sure about this atom? 1.) there are
Sati [7]

2.) there are eight protons

6 0
3 years ago
Read 2 more answers
Give TWO examples of energy conversion that produces unwanted forms of energy.
34kurt

For example, consider the energy used by an electric fan. The amount of electrical energy used is greater than the kinetic energy of the moving fan blades. Because energy is always conserved, some of the electrical energy flowing into the fan's motor is obviously changed into unusable or unwanted forms.

8 0
3 years ago
The hammer, anvil, and stirrup are all bones found in the ear.
AfilCa [17]

Answer: Hammer, anvil and stirrup are small bones in the ear behind ear drum and before cochlea. These bones helps in transfering the vibrations from ear drum to the cochlea which is further passed to auditory nerve and then to brain

Explanation:

4 0
3 years ago
A lightning strike from the air may have started the fire by igniting dry vegetation. This example demonstrates interaction betw
MArishka [77]

Answer:

Atmosphere and Biosphere

Explanation:

8 0
3 years ago
A jet airplane reaches 750 km/h on a certain flight. What distance does it cover in <br> 10 min?
malfutka [58]

The distance that jet covered in 10 min is 125 Km

calculation

distance = speed  x time

speed=750 km/h

time= 10/60hrs

=750 x10/60=125 Km

3 0
3 years ago
Read 2 more answers
Other questions:
  • Consider the following equilibrium:
    8·2 answers
  • What happens to the temperature of water when the average kinetic energy of its particles decreases
    9·1 answer
  • When used in a shorthand electron configuration, the noble gas core [He] represents 1s^2 2s^2 2p^6.
    6·2 answers
  • How do I figure out polarity? thanks!​
    6·2 answers
  • Why are atoms of lithium, sodium, and potassium almost neverfound alone in nature
    12·2 answers
  • The structure of 3-propylpentane is best described as
    9·2 answers
  • Which of the following correctly describes the decomposition of aqueous NaNO3?
    15·1 answer
  • What is the formula for Tetrachlorine pentaiodide
    7·1 answer
  • These graphs compare the people who oppose the use of nuclear energy to the people
    5·1 answer
  • A sample of nitrogen occupies a volume of 250 mL at 25 oC. What volume will it occupy at 95 oC?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!