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
lyudmila [28]
4 years ago
9

The density of water is 1.00g/ml at 4 degrees Celsius.How many water molecules are present in 2.56ml of water at this temperatur

e?
Chemistry
1 answer:
vivado [14]4 years ago
6 0

Answer:

8.55x10^22 molecules

Explanation:

From the question given, the following data were obtained:

Density = 1g/mL

Volume = 2.56mL

Mass =?

Density = Mass /volume

Mass = Density x volume

Mass = 1 x 2.56

Mass = 2.56g

Now let us convert this mass (i.e 2.56g) of water to mole

Molar Mass of H2O = (2x1) + 16 = 2 + 16 = 18g/mol

Mass of H2O = 2.56g

Number of mole of H2O=? Number of mole = Mass /Molar Mass

Number of mole of H2O = 2.56/18

Number of mole of H2O = 0.142mol

From Avogadro's hypothesis, 1mole of any substance contains 6.02x10^23 molecules. This means that 1mole of H2O contains 6.02x10^23 molecules.

Now if 1mole of H2O contains 6.02x10^23 molecules, then 0.142mol of H2O will contain = 0.142 x 6.02x10^23 = 8.55x10^22 molecules

You might be interested in
cross contamination can it be caused by carrying either drinking glasses by the rims,a plate by its underside surface, utensils
harkovskaia [24]

Cross contamination can be caused by CARRYING DRINKING GLASSES BY THE RIMS.

Cross contamination refers to the transfer of harmful microbes to foods from various sources. The rim of a drinking glass is where you put your mouth when you are drinking from a glass cup. If one is carrying a drinking glass by the rim, one can easily transfer the dirty in one's hand to the glass and this will be ingested by person who use the cup. Drinking glasses should be carried by holding their bases.

5 0
3 years ago
Read 2 more answers
Which of the following changes has a decrease in entropy?
Ivahew [28]

In order to solve this problem you need to consider the states of matter and the amount of products.

If there are more products than reactants than there is an increase in entropy.

States of matter: increasing the motion of particles increases entropy.

Molecular movement:

Solid<Liquid<Gas

Changing states of matter from left to right would be an increase in entropy.

Changing states of matter from right to left would be a decrease in entropy

The answer is number 3

3 0
3 years ago
Read 2 more answers
Which of the following substances will have hydrogen bonds between molecules?
bagirrra123 [75]
The answer to your question big man would be E
3 0
3 years ago
List the communities in a successional sequence of secondary succession?
Y_Kistochka [10]
Secondary succession occurs in areas where a biological community has already existed but some or all of that community has been removed by small-scale disturbances that did not eliminate all life and nutrients from the environment.

7 0
2 years ago
Why are there only two elements in the first period of the periodic table?
Elena L [17]

D. the first shell can hold only a minimum of two electrons

4 0
3 years ago
Read 2 more answers
Other questions:
  • Mercury is often used as an expansion medium in a thermometer. The mercury sits in a bulb on the bottom of the thermometer and r
    10·1 answer
  • Which of the following is not an example of an extensive physical property?
    8·2 answers
  • Which of the following phrases best describes a synthesis reaction?
    10·1 answer
  • A total of 0.829 L of hydrogen gas is collected over water at 33.0°C. The total pressure is 794 torr.
    14·1 answer
  • Lavoisier developed a new theory of combustion that overturned the phlogiston theory. What measurements were central to his theo
    7·1 answer
  • All cells need energy to perform various processes and to make molecules that are necessary to sustain their lives. From where d
    13·2 answers
  • Anyone know this ? ASAP
    11·1 answer
  • 1 point
    11·1 answer
  • Which of the following are required for plants to carry out photosynthesis?
    12·2 answers
  • Which best defines color? (1 point)
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!