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
Luba_88 [7]
3 years ago
7

how many moles of water H2O contain 2.0 x 10^22 molecules of water? express the quantity in moles to two significant figures

Chemistry
1 answer:
sashaice [31]3 years ago
7 0
1 mole ------------- 6.02x10²³ molecules
?? moles ---------- 2.0x10²² molecules

( 2.0 x 10²² ) x 1 / 6.02x10²³ => <span>0.0332 moles of water</span>
You might be interested in
Stemscopedia
Alexeev081 [22]
What’s the question
7 0
3 years ago
Is there a way to stop radioactive decay?
Wittaler [7]
The chain reaction is easy to stop. Just add a neuron absorbing material. The Control Rods in rectors can do that You just SCRAM (put the rods all the way in) or add something like Boron and the chain reaction stops. 

<span>The problem is the radioactive waste. Those isotopes break down and release heat spontaneously, no neutrons required. The only known way to stop or slow radioactive decay down is to slow time down by moving at relativistic speed or near orbit to a black hole.</span>
4 0
3 years ago
Which observation supports the claim that Earth's plates move?
Contact [7]

Answer:

B)Continents look like they fit together

4 0
2 years ago
Complete the statement.<br> Ethanol is<br> an elementary substance<br> a compound
Talja [164]

Answer:

a compound is a syllable in the outer world

Explanation:

6 0
2 years ago
What is the molarity if 2.00 liters containing 49.0 grams of sodium carbonate [Na2CO3)?
yKpoI14uk [10]

Answer: The molarity of solution is 0.231 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

Molarity=\frac{n}{V_s}

where,

n = moles of solute

V_s = volume of solution in L

Molar mass of Na_2CO_3 = 2\times 22.99+1\times 12.01+3\times 16.00=105.99

moles of Na_2CO_3 = \frac{\text {given mass}}{\text {Molar mass}}=\frac{49.0g}{105.99g/mol}=0.462mol

Now put all the given values in the formula of molality, we get

Molarity=\frac{0.462mol}{2.00L}

Molarity=0.231M

Therefore, the molarity of solution is 0.231 M

5 0
3 years ago
Other questions:
  • The combustion of 1 mol ch4 releases 803 kj of energy. how much energy is produced from the combustion of 5.00 mol ch4.
    12·1 answer
  • a water heater contains 58 Gal of water. How many kilowatt-hours of energy are necessary to heat the water in the water heater b
    14·1 answer
  • Are ionic compounds flexible or brittle​
    12·1 answer
  • Properties of a solution that depend only on the ratio of the number of particles of solute and solvent in the solution are know
    8·1 answer
  • Why should distilled water be used when conducting chemical tests?
    8·1 answer
  • In which block of the periodic table is chromium (Cr) found? s block d block p block f block
    7·2 answers
  • 13 Consider this neutralization reaction.
    14·2 answers
  • Help me pls someone plss???help me pls someone plss???
    11·1 answer
  • What is the frequency of a particular type of electromagnetic
    7·1 answer
  • 1.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!