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
Serhud [2]
3 years ago
7

Calculate the atomic mass for copper using the weighted average mass method. Express your answer using two decimal places and in

clude the appropriate units.
Chemistry
1 answer:
tatuchka [14]3 years ago
8 0

Answer:

63. 55 amu

Explanation:

Copper is known to exist in two different isotopes which are Cu-63 and Cu-65.

Cu-63 has an atomic mass of 62.93 amu and it has an abundance of 69.15%.

Similarly,

Cu-65 has an atomic mass of 64.93 amu and it has an abundance of 30.85%

Therefore, using the weighted average mass method, the atomic mass of copper is:

Atomic mass of copper = (0.6915*62.93) amu + (0.3085*64.93) amu = 43.52 amu + 20.03 amu = 63.55 amu

Thus, the atomic mass of copper (express in two decimal places) is 63.55 amu

You might be interested in
Determine the molarity of a solution with a volume of 435. mL and 0.550 mol of solute dissolved.
lora16 [44]

Answer:

M = 1.26

Explanation:

Molarity = mole of solution/liters of solution
435mL/1000 = .435L
Plugging in the numbers into the formula, we get:
Molarity = .550 mol/.435L = 1.26 M

8 0
2 years ago
HELP PLEASEEEEEEEEEEEEEEEEEE I CANT GO CANRVIL IF I CANT PASS THIS THEY WANNA SEE MY GRADES AND THIS WILL HELP ME GET MY GRADES
Daniel [21]

Answer:

3,3453 thank me later

Explanation:

1,3433

4 0
3 years ago
Which is true about covalent compounds?have a high melting pointconduct electricity when dissolved in waterhave a low boiling po
iris [78.8K]
The correct answer from the choices given is the third option. Covalent compounds have low boiling points. Also, their melting points are low. Covalent bonds have relatively low attractions which results to these properties. The bonds are easily broken by taking energy or adding energy.
8 0
3 years ago
Instructions:Select the correct answer.
andriy [413]
Activity series of metals: K,Na,Mg,Al,Zn,Fe,Cu,Ag. Metals on the left are more reactive than metals on the right. For example Zn is more reactive than Fe and can displace him. 
Reaction than can occur is: <span>CuSO4(aq) + Fe(s) → FeSO4(aq) + Cu(s).</span>
8 0
3 years ago
What happens to the average speed of the particles
gulaghasi [49]
What are you asking,
When?
6 0
3 years ago
Other questions:
  • I need 3 facts about each and similarities plz
    10·1 answer
  • What is the final temperature of a sample of water if 12.15J of energy is added to 475g of water at an initial temperature of 20
    9·1 answer
  • A hot air balloon is filled with 15 moles helium gas and 5 moles nitrogen gas. What is the volume of the balloon at 1.01 atm and
    5·1 answer
  • sprinters set in the starting blocks at the beginning of a race rely on what kind of energy conversion
    12·1 answer
  • Which animal can leave its eggs to hatch and does not need to take care of the infants?
    11·2 answers
  • An ice skater moves back and forth on an ice rink. She speeds up on the straight portion of the rink. She slows down near each e
    10·1 answer
  • Why do higher trophic levels is most ecosystem contain fewer organisms than lower trophic levels
    15·1 answer
  • I have a TPO set on me should I disobey it and go see my girl and express my love to her ?
    9·1 answer
  • Household ammonia used for cleaning contains about 10 g (two significant figures) of NH3 in 100 mL (two significant figures) of
    11·1 answer
  • State the type of bonding—ionic, covalent, or metallic—you would expect in each: (c) Na(s).
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!