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
babunello [35]
2 years ago
11

Copper has average atomic mass of 63.546 amu. It's two isotopes are Cu-63 (which is 69.17% abundant and has a mass of 62.9296 am

u) and Cu-65. From this information, calculate the mass of Cu-65.
Chemistry
1 answer:
garri49 [273]2 years ago
6 0

Answer: 69.152% → 63^Cu

30.848% → 65^Cu

Explanation:

As you know, the average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes.

Simply put, an element's naturally occurring isotopes will contribute to the average atomic mass of the element proportionally to their abundance.

Explanation:

You might be interested in
A transverse wave is traveling from north to south. Which statement could be true for the motion of the wave particles in the me
Agata [3.3K]
<span>C. Their direction of motion is south and north. </span>
7 0
3 years ago
Pls help me!!!!!!!!!!!!!!!
ELEN [110]

Answer:

c

Explanation:

6 0
2 years ago
Read 2 more answers
Stable nuclei with low atomic numbers, up to 20, have a neutron to proton ratio of approximately ________.
Pie
1 to 1. Most small atoms have the same number of protons and neutrons
6 0
3 years ago
The equilibrium concentrations of the reactants and products are [HA]=0.280 M, [H+]=4.00×10−4 M, and [A−]=4.00×10−4 M. Calculate
Tems11 [23]

Answer:

6.24

Explanation:

The following data were obtained from the question:

Concentration of HA, [HA] = 0.280 M,

Concentration of H+, [H+] = 4×10¯⁴ M

Concentration of A-, [A−] = 4×10¯⁴ M

pKa =.?

Next, we shall write the balanced equation for the reaction. This is given below:

HA <===> H+ + A-

Next, we shall determine the equilibrium constant Ka for the reaction. This can be obtained as follow:

Equilibrium constant for a reaction is simply the ratio of concentration of the product raised to their coefficient to the concentration of the reactant raised to their coefficient.

The equilibrium constant for the above equation is given below:

Ka = [H+] [A−] /[HA]

Concentration of HA, [HA] = 0.280 M,

Concentration of H+, [H+] = 4×10¯⁴ M

Concentration of A-, [A−] = 4×10¯⁴ M

Equilibrium constant (Ka) =

Ka = (4×10¯⁴ × 4×10¯⁴) / 0.280

Ka = 1.6×10¯⁷/ 0.280

Ka = 5.71×10¯⁷

Therefore, the equilibrium constant for the reaction is 5.71×10¯⁷

Finally, we shall determine the pka for the reaction as follow:

Equilibrium constant, Ka = 5.71×10¯⁷

pKa =?

pKa = – Log Ka

pKa = – Log 5.71×10¯⁷

pKa = 6.24

Therefore, the pka for the reaction is 6.24.

6 0
3 years ago
Water can form a solution by mixing with:
MA_775_DIABLO [31]

Explanation:

Solid, liquids and gases

8 0
3 years ago
Read 2 more answers
Other questions:
  • Gasoline contains only hydrogen and carbon atoms, yet nitrogen oxide and nitrogen dioxide are produced when gasoline burns. What
    11·2 answers
  • A beaker has a mass of 77.275 calculate this mass in mg
    7·1 answer
  • Which is classified as a pure substance?
    7·2 answers
  • Ants live on acacia trees in South America. The ants feed on sugars secreted by the trees. The trees provide room for the ants t
    5·1 answer
  • What type of reaction is created by starting a fire by igniting gasoline?
    15·2 answers
  • An ionic compound has the general formula, XCl2. Element X comes from which group? Justify your answer with an explanation and p
    13·1 answer
  • I need help I tried many times and I don’t get it
    11·1 answer
  • PLS HELP DUE IN ONE HOUR The atomic size of atoms increases as you move from top to bottom within a group of
    7·1 answer
  • Label the layers of the earth
    8·1 answer
  • Fill in the blanks
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!