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
Simora [160]
3 years ago
15

32. A sample of potassium is composed of 23% K-39, 48% K-40 and the remainder K-41. Calculate the average mass

Chemistry
1 answer:
mario62 [17]3 years ago
7 0

Answer:

40.06 amu.

Explanation:

From the question given above, the following data were obtained:

Isotope A (K-39)

Mass of A = 39 amu

Abundance of A = 23%

Isotope B (K-40)

Mass of B = 40 amu

Abundance of B = 48%

Isotope C (K-41)

Mass of C = 41 amu

Abundance of C = 100 – (23 + 48)

Abundance of C = 100 – 71

Abundance of C = 29%

Average mass =?

Average mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100] + [(Mass of C × C%)/100]

= [(39 × 23)/100] + [(40 × 48)/100] + [(41 × 29)/100]

= 8.97 + 19.2 + 11.89

= 40.06 amu

Thus, the average mass of potassium is 40.06 amu

You might be interested in
What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large
garri49 [273]

Answer:

large atoms

Explanation:

its kinda obvious

4 0
2 years ago
Read 2 more answers
The picture above represents which of the following?
PSYCHO15rus [73]
This is a plant cell because there are chloroplasts in this diagram which are present in plant cells
6 0
3 years ago
Write the balanced molecular and net ionic equations for the reaction between aluminum metal and silver nitrate. identify the ox
asambeis [7]

Well in this case, silver nitrate is reduced:

Ag<span>+  </span><span>+  </span>e<span>−  </span>→ Ag(s) ↓

 

Meanwhile, the aluminum is oxidized forming a positive ion:

Al(s<span>)  →  </span>Al<span>3+  </span><span>+  3</span>e−

 

To get the overall reaction,  we add the half equations so that the electrons are eliminated:

Al(s<span>)  +   3</span>Ag<span>+  </span><span>→  </span>Al<span>3+  </span><span>+  3</span>Ag(s)

 

And similarly:

Al(s<span>)  +  3</span>AgNO3(aq<span>)  →  </span>Al(NO3)3(aq<span>)  +  3</span>Ag(s<span>)</span>

4 0
3 years ago
Read 2 more answers
Which of the following is the correct scientific notation for 0.000056?
svet-max [94.6K]
Hi,

0.000056 = 5.6 \times  {10}^{ - 5}

Hope this helps.
r3t40
7 0
3 years ago
Which best represents a balanced equation?
bazaltina [42]

Explanation:

none of them

mark me as brainlist ok

4 0
3 years ago
Read 2 more answers
Other questions:
  • What is the mass of 7.91 cm to the power of three piece of lead having a density of 11.34 g/cm to the power of three?
    10·1 answer
  • the buret is dirty and drops of NaOH cling to the side walls of the buret as it drained. How does this affect the result for NaO
    9·1 answer
  • Would the molecules of polar covalent bonds mix better with sugar or oil?
    10·1 answer
  • Why nucleus is stable?
    12·2 answers
  • Why will heat travel faster in solids than in liquids
    6·1 answer
  • Convert 110.4kPa into torr
    8·1 answer
  • A gas is being given off for iron filling and dilute sulphuric a acid- the observation
    5·1 answer
  • 33. An object with a mass of 2300g has a force of 6.2N applied to it. What is the resulting acceleration
    15·1 answer
  • 7. H3PO4 →<br> H4P207+<br> H20<br> Balance the equation
    7·1 answer
  • This boy said he was finna destroy me and winked what does that mean
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!