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
kozerog [31]
3 years ago
9

HELP!!

Chemistry
1 answer:
wlad13 [49]3 years ago
6 0

Answer:

207.24.

Explanation:

The mass numbers of the 4 isotopes are  82+ 122 = 204,  82 + 125 = 207,

82 + 124 = 206 and 208.

The approximate atomic mass  is worked out by adding the products of their relative abundances  and mass numbers:

0.014*204 + 0.221*207 + 0.241*206 + 0.524*208

= 207.24.

You might be interested in
A student states that an exothermic chemical reaction can transfer its heat only by convection and conduction. Which disproves t
Over [174]
b is the right answer

6 0
3 years ago
Read 2 more answers
WILL GIVE BRAINLIEST NO FAKE ANSWERS PLEASE!
AleksAgata [21]

Answer:

A) (3.2g)

Explanation:

Did you reposed this? Because I remember answering this

3 0
2 years ago
Read 2 more answers
In a sample of oxygen gas at room temperature, the average kinetic energy of all the balls stays constant. Which postulate of ki
Levart [38]

Answer:

Collisions between gas particles are elastic; there is no net gain or loss of kinetic energy.

Explanation:

When a gas is paced in a container, the molecules of the gas have little or no intermolecular interaction between them. There is a lot of space between the molecules of the gas.

The gas molecules move at very high speed and collide with each other and with the walls of container.

The collision of these particles with each other is perfectly elastic hence the kinetic energy of the colliding gas particles do not change.

7 0
3 years ago
How to calculate precision chemistry.
chubhunter [2.5K]

Answer:

Subtract The <u>mean</u> from each Numbers Given

Hope it helpz!

7 0
2 years ago
Choose the isotope that would be most stable.<br> carbon-14<br> barium-56<br> lead-82<br> radon-85
shutvik [7]
The most stable isotope would be lead-82.
4 0
2 years ago
Other questions:
  • Explain two advantages and disadvantages of using energy created by nuclear fission and nuclear fusion.
    13·1 answer
  • If sea water has a density of 1.025 kg/L and 3.5% of the mass in sea water is salt, determine the mass of salt dissolved in 500
    7·1 answer
  • What makes a question testable? Can someone help me on this pls it has to be either a 4-5 sentence! this is a science question.
    15·1 answer
  • The density of liquid mercury is 13.69 g/cm 3 . how many atoms of mercury are in a 17 ml sample? use "e" for "×10" and report th
    15·1 answer
  • Develop a demonstration to show how weight is not the same thing as mass
    5·1 answer
  • A 100 milliliters (mL) sample of a liquid is poured from a beaker into a graduated cylinder. Which of the following best explain
    13·1 answer
  • If a neutral atom has 5 protons (+) and 5 neutrons (0), how many electrons does it have?
    10·1 answer
  • The gas in an aerosol can is at a pressure of 3.16 atm at 32.2°C. What would the gas pressure in the can be at 22.9°C?
    7·1 answer
  • A kickball rolling across the field.
    9·1 answer
  • Suppose a substance has a heat of fusion equal to 45 calg and a specific heat of 0.75
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!