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
lutik1710 [3]
3 years ago
6

A 0.55 g sample of H20 contains how manymolecules of water?Answer in units of molec.​

Chemistry
1 answer:
noname [10]3 years ago
7 0

Answer:

Explanation:

Num of molecules = num of moles * Avogadro's constant (6.02* 10^23)

But num of moles = reacting mass / molar mass

Molar mass of H20= 2*1 + 16 = 2+16 = 18g

Reacting mass of H20 = 0.55g

Therefore, num of moles of H20 = 0.55g/18g = 0.031 moles

Therefore, num of molecules of H20 = 0.031 * 6.02*10^23

= 1.87*10^22 molecules of H20

You might be interested in
Help me please!! :D​
dem82 [27]

Answer: Solar eclipse

Explanation:

4 0
3 years ago
Frequency of 6.98 x 1013
MAVERICK [17]

Answer:7,070.74

Explanation:because frequency has a lot of energy

6 0
3 years ago
In a diagnostic test for leukemia, a person receives 4.1 mL of a solution containing selenium-75. If the activity of the seleniu
Tcecarenko [31]

To solve this problem, we can simply calculate for the dose by multiplying the volume of solution containing Selenium 75 and the activity of the Selenium 75. That is:

dose = 4.1 mL * (45 μCi/mL)

dose = 184.5 μCi

8 0
3 years ago
Read 2 more answers
Convert ethene to propanol​
klemol [59]

Answer:

The dehydration of ethanol Highlights Reductive Hydroformylation of ethene to propanol with homogeneous rhodium catalysts. Propane can be oxidized to propanol, and then dehydrated to form propene.

Explanation:

Always be happy!

:)

7 0
3 years ago
Helpppppo meeeeee plzzzzzzzzz
antoniya [11.8K]
For 2 it’s 2ft 10in
For 5 it’s 3ft 6in
You: put how tall you are
Adult: you can either measure an adult or use this 5 ft 10in
6 0
2 years ago
Other questions:
  • An unknown has a chemical formula of C4H10O. When chromic acid was added to the unknown, it turned green. When the Lucas reagent
    6·1 answer
  • 15 g of gold and 25 g of silver are mixed to form a single-phase ideal solid solution.
    14·1 answer
  • Choose the pieces of evidence that supported the existence of Pangaea and continental drift theory.
    10·2 answers
  • Which best describes the law of conservation of mass? The coefficients in front of the chemicals in the reactants should be base
    15·2 answers
  • When dynamic equilibrium is achieved, the rate of the forward and backward reactions go to zero. (T&F)
    12·1 answer
  • Why do we increase the surface area of a solid when dissolving?
    15·1 answer
  • Which of these locations is NOT a main-oil producing region for the United States?
    10·2 answers
  • A 425-ml sample of hydrogen is collected above water at 35°c and 763 torr. find the volume of the hydrogen sample when the tempe
    5·2 answers
  • What would school look like on mars in a 100 years?
    13·1 answer
  • An ion of a single pure element always has an oxidation number of ________. a. 1 b. magnitude equal to its atomic number c. 0 d.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!