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
V125BC [204]
1 year ago
10

how many moles of potassium dichromate (k2cr2o7) are required to prepare a 250-ml solution of with a concentration of 2.16 m?

Chemistry
1 answer:
Eva8 [605]1 year ago
4 0

The moles of potassium dichromate , K₂Cr₂O₇ are required to prepare a 250 mL solution of with a concentration of 2.16 M  is 0.54 mol.

given that :

molarity = 2.16 M

volume = 250 mL = 0.25 L

the molarity is given as :

molarity = number of moles / volumes in L

from this we can calculate the number of moles, we get :

number of moles of K₂Cr₂O₇ = molarity × volume

number of moles of K₂Cr₂O₇ = 2.16 × 0.25

number of moles of K₂Cr₂O₇ = 0.54 mol

Thus, The moles of potassium dichromate , K₂Cr₂O₇ are required to prepare a 250 mL solution of with a concentration of 2.16 M  is 0.54 mol.

To learn more about moles here

brainly.com/question/15209553

#SPJ4

You might be interested in
A 4-inch, f/5 telescope has a 1-inch eyepiece focal. Its magnifying power is:
Gre4nikov [31]

Its magnifying power is: 4X 5X 9X 20X. A 4-inch, f/5 telescope has a 1-inch eyepiece focal. Its magnifying power is 9x. This answer has been confirmed as correct and helpful.

7 0
3 years ago
Read 2 more answers
Given the reaction below, which is the oxidized substance?
tresset_1 [31]

Answer:

Mg ²⁺

Explanation:

Τhe metal loses electrons and in forming Mg²⁺ ,it loses 2 electrons and hence oxidized.

Mg(s) ⇒ Mg²⁺ + 2e⁻

3 0
3 years ago
Read 2 more answers
Which of the following is an example of point-source pollution? A. Salt from roads B. Water from a sewage treatment plant C. Fer
ivanzaharov [21]

Answer:

Acid from abandoned mines- D.

7 0
3 years ago
Help Please... giving brainliest..
WINSTONCH [101]

1) Well, you need to logically think about which of the pecan trees would be better. Tree 3 may have more clusters but they taste bitter so this is out of the option. So Tree 4 and Tree 1 would be best because they both have rich and buttery tastes and they both have a lot of clusters.

2) Not quite sure about this one, sorry :(

3 0
2 years ago
Read 2 more answers
Explain why you usually can't use just a single spectrum line to confirm the identity of an element
Agata [3.3K]
You can't usually just use a  single spectrum line to confirm the identity of an element because there are cases that the emission line id not clearly defined.  When the emission line is very weak compared to surrounding noise, in which case the more datapoints you have to build up confidence for the existence of a particular emission spectra, the better.
8 0
3 years ago
Other questions:
  • What is 13.48 cm + 7.6 cm, rounded to the correct number of<br> significant figures?
    15·1 answer
  • 650.J is the same amount of energy as? <br>2720cal<br>1550cal<br>650.cal<br>2.72cal
    14·2 answers
  • You have arrived on a planet where S2, not O2, is the gas used as fuel in combustion reactions. When gaseous propane (C3H8) is b
    6·1 answer
  • What could happen to the amount of greenhouse gases in the atmosphere if oceans continue to warm? How could this impact global c
    14·1 answer
  • The neutron has no electrical charge. True False
    8·2 answers
  • If an object loses electrons it will become negatively charged. <br><br><br> True<br><br> False
    6·1 answer
  • Liquid molecules have a:
    10·1 answer
  • Thermal energy is added to four identical samples of water.  what increases in each sample A. Mass B. density C. Kinetic ener
    6·1 answer
  • What is the density of krypton gas (MM = 83.8 g/mol) at 3.00<br> atm and 100. °C?<br> g/L
    8·1 answer
  • If 10.23 moles of NH3 were produced, how many moles of N2 would be required?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!