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
mars1129 [50]
2 years ago
15

What is the "average atomic mass" of this set of pennies.

Chemistry
1 answer:
natulia [17]2 years ago
7 0

Answer:

A. 2.74g is the correct answer

Explanation:

<h3>Greetings!</h3>

average \: mass =  \frac{(mass \: pre - 1982 \times abundance) + (mass \: post - 1982 \times abundance}{100 }  \\ ave = \frac{ (3.1g \times 40.0) + (2.5g \times 60.0)}{100}  \\ ave =  \frac{124 + 150}{100}  \\ ave =  \frac{274}{10}  = 2.74g

where, the sum of abundance always have to be 100%

Thus, 40.0 +60.0= 100.0

You might be interested in
As the pendulum moves from point 2 to point 3, what happens to its mechanical energy?potential energy is converted to kinetic en
ahrayia [7]

Answer: Potential energy is converted to kinetic energy and back again.

Explanation:At points 1 and 3, the pendulum stops moving, and its mechanical energy is purely potential. At point 2, the pendulum is moving the fastest, and its mechanical energy is purely kinetic. Therefore, as the pendulum moves from point 1 to point 3, its potential energy is first converted to kinetic energy, then back to potential.

3 0
3 years ago
What is a materials ability to dissolve in a solvent
ExtremeBDS [4]
I believe it might be A, hope this helps!
5 0
3 years ago
Read 2 more answers
P + O2 → P4O10 balance the equation
poizon [28]
4P + 502 -> P4O10 this is the answer
5 0
2 years ago
3. A helium laser emits light with a wavelength of 6.33 x 10^-7m. What is
HACTEHA [7]

Answer:

4.52 x 10¹⁴ cycles/s

Explanation:

From c = f·λ => f = c/λ = (3.0 x 10⁸ m/s)/(6.63 x 10⁻⁷m) = 4.52 x 10¹⁴ cycles/s.

f = frequency = ?

λ = wavelength = 6.63 x 10⁻⁷ meter

c = speed of light in vacuum = 3.0 x 10⁸ meters/s

7 0
2 years ago
What molecules can be made using hydrogen, carbon, and nitrogen?​
Yuki888 [10]

Answer:

Ammonia

Explanation:

Ammonia is the simplest possible molecule made with nitrogen and hydrogen. Methane is the simplest possible molecule made of carbon and hydrogen. Methanol is like methane, but it also has one oxygen atom as well.

8 0
3 years ago
Other questions:
  • What is true about two neutral atoms of the element gold
    6·1 answer
  • nickel(ii) carbonate + hydrobromic acid = nickel(ii) bromide + carbonic acid + bromine gas how do you balance this equation
    7·1 answer
  • Identify some other substances (besides KCl) that might give a positive test for chloride upon addition of AgNO3. do you think i
    5·1 answer
  • 3) A saturated solution of PbCl2 in water was prepared and filtered. From the filtrate (solution collected after filtration), 50
    15·1 answer
  • CTEVT 2063 [2] CTEVT 2062 Q. No. 1e. Honey can't flow as easy as petrol. Why? [2] ICTEVT 2061 Q. No. 19] What is saturated solut
    10·1 answer
  • In the outline of the Periodic Table below, some elements are shown as numbers.
    7·2 answers
  • Your friend cuts his sandwiches in half diagonally because then he gets twice as much
    11·2 answers
  • Angry pomeranian x bones? broken\broccoli boy anyone?
    11·1 answer
  • Question 12 (1 point)
    8·1 answer
  • How many atoms are in 0.560 moles of iron?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!