Sign In
Ask Question
Remington Estrada
Chemistry
2 June, 04:23
How many grams are in 6.78 x 10^24 atoms of He?
+1
Answers (
2
)
Snowy
2 June, 04:35
0
45.05grams
Explanation:
Number of atoms present in a substance = number of moles of the substance * Avogadro's number
Given, number of atoms = 6.78*10^24
Number of moles = mass / molar mass
Molar mass of Helium = 4g/mol
Avogadro's number = 6.02*10^23
Therefore,
6.78*10^24 = (m/4) * (6.02*10^23)
6.78*10^24 = (6.02*10^23*m) / 4
Cross multiply
6.02*10^23*m=4*6.78*10^24
Divide both sides by 6.02*10^23
m = (4*6.78*10^24) / 6.02*10^23
m = (27.12*10^24) / 6.02*10^23
m=45.05grams
Therefore, there are 45.05grams in 6.78*10^24 atoms of helium
Comment
Complaint
Link
Serena Lindsey
2 June, 04:37
0
45.05g
Explanation:
Based on the Avogadro's hypothesis, we understood that 1 mole of any substance contains 6.02x10^23 atoms.
From the above findings,
1 mole of He also contains 6.02x10^23 atoms.
1 mole of He = 4g
If 4g of He contains 6.02x10^23 atoms,
then Xg of He will contain 6.78x10^24 atoms i. e
Xg of He = (4x6.78x10^24) / 6.02x10^23
Xg of He = 45.05g
Therefore, 45.05g of He contains 6.78x10^24 atoms
Comment
Complaint
Link
Know the Answer?
Answer
Not Sure About the Answer?
Find an answer to your question 👍
“How many grams are in 6.78 x 10^24 atoms of He? ...”
in 📗 Chemistry if the answers seem to be not correct or there’s no answer. Try a smart search to find answers to similar questions.
Search for Other Answers
You Might be Interested in
You are given the drawing of 2 waves. Notice, wave A is taller and Wave B is thinner. Since wave A is taller, wave
Answers (1)
What is the difference between placing a 1.5-volt battery in a circuit and placing a 9-volt battery in a circuit
Answers (1)
Which of the following is not one of the three ingredients needed to form a cloud? dust or solid matter of some sort water molecules wind temperature and pressure changes
Answers (1)
941 milliliters is the same as: cm3 and L
Answers (1)
Which of the following is NOT a property of acids? A) Acids turn litmus paper red. B) Acids dissolve many metals. C) Acids have a sour taste. D) Acids have a slippery feel. E) All of the above are properties of acids.
Answers (2)
New Questions in Chemistry
What is the mass in grams of 5.00moles of CH4? How many moles of oxygen gas O2, are present in a 38g sample of O2
Answers (1)
25 In general, for a gas at a constant pressure, A the temperature of the gas is inversely proportional to its volume B. the temperature of the gas is inversely proportional to its pressure C.
Answers (1)
The vapor pressure of ethanol is 54.68 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in ethanol is saccharin. Calculate the vapor pressure of the solution at 25 °C when 8.054 grams of saccharin, C7H5NO3S (183.
Answers (1)
What do microscopic producers supply the atmosphere with?
Answers (1)
A particular form of electromagnetic radiation has a frequency of 8.11 x 10^14 hz. What is the energy in joules of one quantum of this radiation?
Answers (1)
Home
»
Chemistry
» How many grams are in 6.78 x 10^24 atoms of He?
Sign In
Sign Up
Forgot Password?