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
grin007 [14]
3 years ago
9

How many moles are in 123.0 grams of KClO4? (3 points)

Chemistry
1 answer:
iVinArrow [24]3 years ago
5 0

Answer:

0.8878 mol KClO4

Explanation:

Molar mass of KClO4 = 39.0983 + 35.453 + ( 15.9994 x 4 ) = 39.0983 + 35.453 + 63.9976 = 138.5489g/mol

but,

number of moles = mass in grams / molar mass where mass in grams = 123g, molar mass = 138.5489g/mol

number of moles = 123g / 138.5489g/mol = 0.8878mol

You might be interested in
If you have 3.5 L of He to blow up balloons... at STP...
Serga [27]

Answer:

B

Explanation:

7 0
3 years ago
Which of the following is generally true of female bones in relationship to male bones?
gtnhenbr [62]
What are the options
6 0
3 years ago
\"Moving down group 2A (Alkaline Earth Metals), which element has the largest first ionization energy?\" Is the answer to this:
lesya692 [45]

Ionization energy is the energy required to remove the outermost electron from one mole of gaseous atom to produce 1 mole of gaseous in to produce a charge of 1. The greater the ionization energy, the greater is the chance f the electron to be removed from the nucleus. In this casse, Radium has the largest ionization energy.

6 0
3 years ago
If the Dry bulb reads 25 degrees Celsius and the wet bulb reads 22
Nitella [24]

Answer:

Relative humidity is low .

Explanation:

The wet bulb reads low temperature because due to low humidity of atmosphere , evaporation of water takes place from the wet bulb which makes the bulb cool and therefore it reads lower temperature . In the process of evaporation , heat equal to latent heat of vaporization is taken from the bulb and it loses temperature.

6 0
3 years ago
Benzoic acid, c6h5cooh, has a ka = 6.4 x 10-5. what is the concentration of h3o+ in a 0.5 m solution of benzoic acid? 3.2 x 10-5
FinnZ [79.3K]
The answer for this issue is: 
The chemical equation is: HBz + H2O <- - > H3O+ + Bz- 
Ka = 6.4X10^-5 = [H3O+][Bz-]/[HBz] 
Let x = [H3O+] = [Bz-], and [HBz] = 0.5 - x. 
Accept that x is little contrasted with 0.5 M. At that point, 
Ka = 6.4X10^-5 = x^2/0.5 
x = [H3O+] = 5.6X10^-3 M 
pH = 2.25
(x is without a doubt little contrasted with 0.5, so the presumption above was OK to make) 
3 0
4 years ago
Other questions:
  • In the formation of potassium chloride, the product, KCl, has less energy than the reactants, K and Cl2. This reaction is .
    12·1 answer
  • The heat of vaporization of water is 40.66 kj/mol. how much heat is absorbed when 2.46 g of water boils at atmospheric pressure?
    7·2 answers
  • if lithium loses an electron to become li+ what is the average atomic mass of the lithium ion? explain how you arrived at your a
    14·2 answers
  • If the average speed of a car is 45km/s, how far can it travel in 5 seconds?
    8·1 answer
  • What is the chemical characteristics of the compound barium oxide?
    7·1 answer
  • 7. Elements in group one are called.​
    9·1 answer
  • A balloon with a volume of 2.0 L is filled with gas at 3 atm. If the pressure is reduced to 1.5 atm without a change in temperat
    9·1 answer
  • The longest wavelength of light that causes electrons to be ejected from the surface of a potassium metal plate is 539 nm. If 40
    12·1 answer
  • 250 mL of 1.5 M nitric acid is mixed with 250 mL of 2.5 M sodium hydroxide. Calculate the pH of the resulting mixture.
    9·1 answer
  • 7 on the pH scale represents what?
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!