How many moles of solute are present in 50.0mL of 0.20m KNO3?

Answers

Answer 1
Answer:

The moles of potassium nitrate present in the 50 ml of 0.2M solution has been 4 moles.

Molarity can be defined as the moles of solute in a litre of solution. The solution of potassium nitrate has been prepared to be of Molarity 0.2 M. The moles of solute present in the solution can be calculated as:

Molarity = moles * volume (L)

The given volume = 50 ml

1000 ml = 1 L

50 ml = 0.05 L

Molarity of the solution = 0.2 M

The moles of solute:

0.2 = moles * 0.05

Moles of Potassium nitrate = 4

The moles of potassium nitrate present in the 50 ml of 0.2M solution has been 4 moles.

For more information about the moles of solute, refer to the link:

brainly.com/question/1414530

Answer 2
Answer: Volume =  50.0 mL in liters : 50.0 / 1000 = 0.05 L

n = M x V

n = 0.20 x 0.05

n = 0.01 moles of solute



Related Questions

The heat of formation of Fe2O3(s) is –826.0 kJ/mol. Calculate the heat of the reaction 4Fe(s) + 3O2(g) → 2Fe2 O3(s) when a 53.99-g sample of iron is reacted.
What are the horizontal rows on the periodic table?
Is AgOH aqueous or a solid?
An atomic nucleus must contain at least one neutron or else the force of attraction of the electron(s) will collapse the atom. True/false
Which statement describes the particles of an ideal gas based on the kinetic molecular theory?(1) The gas particles are relatively far apart and have negligible volume.(2) The gas particles are in constant, nonlinear motion.(3) The gas particles have attractive forces between them.(4) The gas particles have collisions without transferring energy.

What's at the bottom of a black hole?

Answers

All matter in a black hole is crushed into a single point at the center called singularity. 

Why is every solution a mixture and not every mixture is a solution?

Answers

A solution is a mixture where the components are evenly distributed and remain separate only on a molecular level.
A mixture is where the components remain distinct from one another such as particles and phases.

What are the products when anaerobic respiration occurs in yeast cells? Carbon dioxide, water, and energy

Carbon dioxide, ethanol, and energy

Lactic acid and energy

Glucose, oxygen, and energy

Answers

The correct answer is the second option. Anaerobic respiration is a type of respiration which involves the use of electron acceptors other than oxygen. This is respiration without using oxygen. An example is alcohol fermentation where the the reactants are glucose and enzymes forming to products which are CO2, ethanol and energy.
carbon dioxide, water, and ATP

if a chemist wants to make 1.3L of 0.25M solution of KOH by diluting a stock solution of 0.675 M KOH, how many milliliters of the stock solution would the chemist need to use?

Answers

To solve this we use the equation,

 

M1V1 = M2V2

 

where M1 is the concentration of the stock solution, V1 is the volume of the stock solution, M2 is the concentration of the new solution and V2 is its volume.

 

.675 M x V1 = .25 M x 1.3 L

V1 = 0.48 L or 480 mL

If a chemist wants to make 1.3 L of 0.25 M solution of KOH by diluting a stock solution of 0.675 M KOH, the chemist would need to use 480 mL of the stock solution.

The science of using tree rings to determine absolute age is calleda. disconformity.
b. radiometric dating.
c. dendrochronology.
d. radioactive dating.

Answers

Option c. dendrochronology

tree rings or dendrochronology they allow to use it in calibration for carbon-14 on temporal placements of fragments of wood (from long dead trees).

Example Bristle cone pines (1957) 4723 years old
The best answer to the question that is being presented above would be letter c. Dendochronology is the science of using tree rings to determine absolute age. All the others are other forms of dating that would determine the tree's age.

Fe(NO3)2 not sure how to get the oxidation numbers of all elements

Answers

You must remember that oxidation number of hydrogen in acids is always +1, oxidation number of oxygen in oxides & acids is always -2... metals has always oxidation number on plus!

group NO3 comes from HNO3...and oxidation number of whole acid group is always on minus and equal to the amount of hydrogen atoms in this acid... so oxidation number of NO3 = -1

we have 2 NO3 groups so 2*(-1) = -2 and that is the reason why oxidation number of Fe in this formula must be +2... because sum of all elements always gives 0!

Now we could count of oxidation number for nitrogen... we write HNO3 and start counting from right to left:
3*(-2) from oxygens + 1 from hydrogen = -5
so nitrogen must have +5 oxidation number... because sum all in formula must be 0.