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
dalvyx [7]
3 years ago
14

Help me answer this chemistry question. thank you!

Chemistry
1 answer:
tatiyna3 years ago
8 0

Answer:

78.85

Explanation:

To <u>calculate the average atomic mass of the isotopes </u>we use the <em>given masses and abundances</em>, as follows:

  • Mass of Isotope 1 * Abundance of Isotope 1 + Mass of Isotope 2 * Abundance of Isotope 2 + ....

In other words:

  • 78 amu * 75/100 + 81 amu * 15/100 + 82 amu * 10/100 = 78.85

So the answer is 78.85.

You might be interested in
Which measurement would not be possible to obtain from the triple beam balance shown? a. 558.6 g b. 463.455 g c. 2.4 g d. 100.0
kirza4 [7]

Answer: B. 463.455 g

Explanation:

8 0
3 years ago
Determine the volume, in liters, of 3.2 mol of CO2 gas at STP.
Allushta [10]

Answer:

71.7 L

Explanation:

Using the ideal gas equation;

PV = nRT

Where;

P = pressure (atm)

V = volume (L)

n = number of moles (mol)

R = gas law constant (0.0821 Latm/Kmol)

T = temperature (K)

According to the information provided in this question;

P = 1 atm (STP)

V = ?

n = 3.2mol

T = 273K (STP)

Using PV = nRT

V = nRT/P

V = 3.2 × 0.0821 × 273/1

V = 71.7 L

6 0
3 years ago
Help if you can please.​
Cloud [144]
Nuclear i believe because it has nucleus in the sentence and also talk about it
6 0
3 years ago
Read 2 more answers
What characterizes a strong acid or base? complete ionization in water polar covalent bonding presence of a hydroxide or hydroge
Natasha2012 [34]

1. Complete ionization in water.  

2. Ionization constant.  

3. A good hydrogen-ion acceptor.  

4. Weak acid.  

5. This base ionizes slightly in aqueous.

I really hope this answer helps you out! It makes my day helping people like you and giving back to the community that has helped me through school! If you could do me a favor, if this helped you and this is the very best answer and you understand that all of my answers are legit and top notch. Please mark as brainliest! Thanks and have a awesome day!

7 0
3 years ago
Read 2 more answers
On Earth an object weighs 50 N. On Planet X, the object weighs 500 N. What conclusion can be drawn from these observations? A. P
inysia [295]
The gravitation field strength of Planet X is 10 times that of Earth's, as the object weight has increased 10 times. This is only possible if the planet is more massive or more dense (smaller diameter).

Therefore, the answer is C.
7 0
3 years ago
Other questions:
  • Which of the following types of fingerprints is collected with gray or black powder and fingerprint tape?
    5·1 answer
  • A circuit is shown in the picture above. Energy is transferred first from the battery to the circuit wire and then from the circ
    10·1 answer
  • Explain how temperature and amount of precipitation can affect the type of plants and animals found in the grassland biome?
    6·1 answer
  • g The atomic mass of an element is equal to ________. The atomic mass of an element is equal to ________. its mass number one-tw
    11·1 answer
  • Select the correct answer from each drop-down menu.
    8·1 answer
  • Addition of 6 M HCl to which substance will not result in gas evolution? Please explain why.A) AlB) ZnC) K2CO3D) NaNO3
    8·1 answer
  • A class is 47 min how many seconds is this ?
    9·1 answer
  • A titration is completed using 10.0 mL of 0.50 M HCl and an unknown concentration of NaOH solution. If the equivalence point is
    12·1 answer
  • What is extrapolation?
    5·1 answer
  • What is the final temperature of a 2.50 L system when its volume is reduced to 1.75 L if the initial temperature was 298 K?
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!