With work shown. 7. Calculate the number of sodium atoms in 4.66 moles of sodium. 8. What is...

Free

60.1K

Verified Solution

Question

Chemistry

With work shown.

7. Calculate the number of sodium atoms in 4.66 moles ofsodium.
8. What is the molar mass fo a substance if 0.6502 moles of thesubstance has a mass of 19.27 grams?
9. How many grams are present in 7.5 moles of Cu (NO3)2?
10. How many atoms are present in a Mg sample with a mass of14.6 grams?
11. How many atoms of H are present in 37.6 g of NH3?
12. How many atoms are present in 0.45 moles of P4O10?
13. The empirical formula of a compound is CH2O and it's formulaweight is 120.12 amu. What is the molecular formula?
14. Analysis of an unknown sample indicated the sample contained0.140g of N and 0.320 g of O. The molar mass of the compound wasdetermined to be 92.02 amu. What is the molecular formula of thecompound?

Answer & Explanation Solved by verified expert

3.7 Ratings (611 Votes)

7. no of sodium atoms = no of moles * 6.023*10²³

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 4.66*6.023*10²³

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 2.806*10²⁴ atoms

8. molar mass = mass of substance/no of moles

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 19.27/0.6502Â Â = 29.64 g/mole

9. mass of Cu(NO3)2Â Â = no of moles* gram molar mass

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 7.5*187.56 = 1406.7g

10. no of magnesium atoms = W*6.023*10²³/G.A.Wt

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 14.6*6.023*10²³ /24

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 3.7*10²³ atoms

11. no of hydrogen atoms = W*6.023*10²³ * atomicity of hydrogen/G.M.Wt

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 14.6*6.023*10²³*3 /17

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â =1.55*10²⁴ hydrogen atoms

12. no of atomsÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â = no of moles * 6.023*10²³ * atomicity

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 0.45*6.023*10²³ *14

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 3.794*10²⁴ atoms

13. molecular formulaÂ Â = (empirical formula)n

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â nÂ Â Â Â Â Â Â Â Â Â Â Â = M.F.wt/E.F.Wt

Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â = 120.12/30 = 4

molecular formula = (CH2O)4 = C4H8O4

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member

With work shown. 7. Calculate the number of sodium atoms in 4.66 moles of sodium. 8. What is...

Free

60.1K

Verified Solution

Question

Chemistry

Answer & Explanation Solved by verified expert

Get Answers to Unlimited Questions

Membership Benefits:

Other questions asked by students

Use the 74LS138 , to design an address decoder that will place 8K by 16bit...

What does Wade say he really wants to do with the winnings if he wins...

CA A B E J K Proteobacteria Mitochondria Cyanobacteria Chloroplasts Archaea Green algae Plants Brown...

7 34 A rubber ball with a mass M and radius R is submerged into...

A Statement AB DE AC B D E Reason Substitution Property of Equality Simplify Division...

For problems 15 16 let X be from a binomial n 20 p distribution Let...

Bon Nebo Co. sold 25,000 annual subscriptions of Bjorn 20XX for $85 during December 2014....

At the time of her death, Ariana held the following assets. ...

Bubba Ltd operates a fish market. For the year ended 30...

Research recent IRS audit activities related to deferred compensation to determine the most frequent types...

Alicia has been working for JMM Corporated for 32 years. Alicia participates in JMM's defined...

Gibson Corporation has a desired rate of return of 8 percent. Willam Tobin is in...