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
An object becomes positively charged when it
ludmilkaskok [199]
A. loses electron, bc electrons are negatively charged, protons are positively charged, when electrons are lost, that means there are more protons more
5 0
3 years ago
Read 2 more answers
HALP PLZ I NEED AN ANSWER ASAP!!! 108, 110, and 112
yanalaym [24]

Answer:

112.

a. [Ne] 3s^{2}3p^{5}

b. [He] 2s^{2}2p^{1}

c. [Ar] 3d^{1}4s^{2}

d. [Kr] 4d1 5s2

e. Xe 4f14 5d10 6s2 6p5

3 0
3 years ago
Read 2 more answers
All changes saved
Kipish [7]

Answer:

4.00L

Explanation:

Using Charle's law, which have the following equation:

V1/T1 = V2/T2

Where;

V1 = initial volume (litres)

T1 = initial temperature (Kelvin)

V2 = final volume (litres)

T2 = final temperature (Kelvin)

According to the information provided, T1 = 275K, T2 = 400K, V1 = ?, V2 = 5.82L

Hence, using the formula;

V1/275 = 5.82/400

400 × V1 = 275 × 5.82

400V1 = 1600.5

V1 = 1600.5 ÷ 400

V1 = 4.001

Therefore, volume of the gas before it is heated is 4.00L

4 0
3 years ago
Which equation represents the combined gas law?
STALIN [3.7K]

Answer:

P1V1/T1 = P2V2/T2

Explanation:

- Hope that helped! Let me know if you need further explanation. Sorry I didn't give you exaxt one, it was kinda hard to read, but that is the correct answer I put above.

4 0
3 years ago
A 250-mL aqueous solution contains 1.56 mc025-1.jpg 10–5 g of methanol and has a density of 1.03 g/mL. What is the concentration
Elis [28]
The right answer for the question that is being asked and shown above is that: "B 1.5 X 1-^-5 ppm." A 250-mL aqueous solution contains 1.56 mc025-1.jpg 10–5 g of methanol and has a density of 1.03 g/mL. The concentration in ppm is that <span>1.5 X 1-^-5 ppm</span>
4 0
4 years ago
Read 2 more answers
Other questions:
  • Andreas accidently breaks a glass beaker. What should he do next? use his shoe to gather the pieces notify his teacher and class
    14·2 answers
  • How many significant figures are in 7.1 x 10-6
    12·1 answer
  • Write the formulae and names of compounds formed by combination of
    5·1 answer
  • The mass of Earth is 5.974x10^24 kg. Assume that Earth is a sphere of diameter 1.28x10^4 km and calculate the average density of
    6·1 answer
  • ) In the Deacon process for the manufacture of chlorine, HCl and O2 react to form Cl2 and H2O. Sufficient air (21 mole% O2, 79%
    11·1 answer
  • 20.0m equals how many feet ? Round your answers to the nearest tenth.
    10·1 answer
  • A mutation occurs in a gene causing a pea plant produce 75% fewer leaves. this would be considered what kind of mutation?
    7·1 answer
  • Which of the following gases has the highest average speed at 400k
    14·1 answer
  • What are the dependent and independent variables? (Picture^^)
    15·1 answer
  • Since carboxylic acids can form hydrogen bonds to create dimers, they have higher boiling points than alcohols and other carbony
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!