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
levacccp [35]
3 years ago
10

Calculate the number of atoms of sodium in a 4.5-gram sample

Chemistry
1 answer:
allochka39001 [22]3 years ago
7 0

Answer:

1.18×10²³ atoms.

Explanation:

From Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02×10²³ atoms.

From the above concept, 1 mole of sodium also contains 6.02×10²³ atoms.

1 mole of sodium = 23 g.

Thus,

23 g of sodium contains 6.02×10²³ atoms.

Therefore, 4.5 g of sodium will contain = (4.5 × 6.02×10²³)/23 = 1.18×10²³ atoms.

From the above calculation,

4.5 g of sodium contains 1.18×10²³ atoms.

You might be interested in
(c) Polar solutes were separated by hydrophilic interaction chromatography (HILIC) with a strongly polar bonded phase. How would
Lelu [443]

Answer:

(c) The retention time would be higher (d) The retention time would be lower.

Explanation:

For the polar solutes which were separated using the hydrophilic interaction chromatography (HILIC) with a strongly polar bonded phase, the retention time would be higher if eluent were changed from 80 vol% to 90 vol% acetonitrile in water.

However, for the polar solutes which were separated using the normal-phase chromatography on bare silica with methyl t=butyl ether and 2-propanol solvent, the retention time would be lower if the eluent were changed from 40 vol% to 60 vol% 2-propanol.

5 0
3 years ago
Why is it important to have the International System of Units?
omeli [17]
<span>It can be used by scientists everywhere its important to have the International System of Units.</span>
4 0
3 years ago
What is the name of this molecule? (will give BRAINLIEST)
mrs_skeptik [129]

Answer:

2 - Butyne

Explanation:

The name of the molecule with a carbon atoms arranged in a straight chain with a triple bond between the second and third carbons is 2 - Butyne.

2- Butyne is an alkyne with structural formula given below. Some of the properties of Butyne include it is a produced artificially, it is volatile and colorless in nature.

Hence, the given molecules described is 2 - Butyne.

6 0
2 years ago
What mass of znco3 contains 6.11×1022 o atoms? give your answer correctly to three significant digits?
nordsb [41]

Using Avogadros number, we can get that 1 mole of an atom contain 6.022 x 10^23 atoms. Therefore we can use this conversion factor to get the number of moles:

moles ZnCO3 = 6.11 x 10^22 atoms * (1 mole / 6.022 x 10^23 atoms) = 0.10146 moles

 

The molar mass of ZnCO3 is about 125.39 g/mol, therefore the mass is:

mass ZnCO3 = 0.10146 moles * (125.39 g / mol)

<span>mass ZnCO3 = 12.72 g</span>

5 0
3 years ago
Read 2 more answers
What Household item turns electrical energy into radiant energy
luda_lava [24]

Answer:

Lamps and televisions

Explanation:

I think those qualify.

6 0
2 years ago
Read 2 more answers
Other questions:
  • Choose the correct answers from the drop-down menus to complete the paragraph about how sunlight travels through the atmosphere.
    9·2 answers
  • HOW DOES CHEMILUMINESCENCE WORK AND WHERE IS IT USED?
    9·1 answer
  • The process by which increased levels of CO2 in the atmosphere lead to enhanced growth of vegetation, which then removes CO2 fro
    9·1 answer
  • Helppp mee plz guysss
    11·2 answers
  • think about the statement "there is no new water on earth" write at least 5 sentences describing how there can be no new water o
    11·1 answer
  • Group 1A element sodium combines with Group 7A element chlorine to form sodium chloride or table salt. Based on this information
    6·1 answer
  • A cylinder is filled with 2.00 moles of nitrogen, 3.00 moles of argon, and 5.00 moles of helium.
    7·2 answers
  • PLZ HELP! WILL GIVE BRAINLIEST, 5 STARS, AND A THANKS!!
    8·2 answers
  • Como hallar el numero de protones y el numero de electrones de un elemento
    6·1 answer
  • Calculate the pH for the following solutions and indicate whether each solution is acidic or basic.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!