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
jok3333 [9.3K]
2 years ago
7

What percentage of a substance remains after 7 half-lives have passed?

Chemistry
1 answer:
Mila [183]2 years ago
5 0

Answer:

Not really sure, buts its either B or C.

You might be interested in
Most common energy source in cellular respiration
topjm [15]

Answer: cytoplasm

Explanation:

7 0
3 years ago
Read 2 more answers
A helium balloon is filled on the ground where the atmospheric pressure is 768 torr. The volume of the balloon is 8.00 m3. When
Anvisha [2.4K]

Answer:

The correct option is: <u>B. 366 torr</u>

Explanation:

Given: <u>On the ground</u>- Initial Volume: V₁ = 8.00 m³, Initial Atmospheric Pressure: P₁= 768 torr;

<u>At 4200 m height</u>- Final Volume: V₂ = 16.80 m³, Final Atmospheric Pressure: P₂ = ?

Amount of gas: n, and Temperature: T = constant

<u>According to the Boyle's Law</u>, for a given amount of gas at constant temperature:         P₁ V₁ = P₂ V₂

⇒  P₂ = P₁ V₁ ÷ V₂

⇒  P₂ = [(768 torr) × (8.00 m³)] ÷ (16.80 m³)

⇒  P₂ = 365.71 torr ≈ 366 torr

<u>Therefore, the final air pressure at 4200 m height: P₂ = 366 torr.</u>

6 0
3 years ago
if the climate warmed which of the following would be caused by rising temperatures? .a. an increase in sea levels. b. an increa
Klio2033 [76]

A warming climate can cause seawater to expand and ice over land to melt, both of which can cause a rise in sea level. Storm surge on a Louisiana highway shows the effects of rising sea levels. Many people are interested in climate change and how a changing climate will affect the ocean.

5 0
3 years ago
Each A atom is adjacent to 3 B atoms. What is the A-C-B bond angle?
Nutka1998 [239]
Using the simulation to build a system with 5 bonds. The resulting structure is called the Trigonal bipyramidal structure. The two different sites in a trigonal bipyramid are labeled as A and B in the drawing to the right. 
In this case, therefore, the bond angle A-C-B is 90 Degrees (right angle)
3 0
3 years ago
Calculate the speed of a marble that rolls 9 cm in 4 seconds
cupoosta [38]

Answer:

2.25

Explanation:

9/4

6 0
3 years ago
Other questions:
  • What is a melting point
    6·2 answers
  • Is NO a polar molecule?
    10·2 answers
  • Word or symbol used to describe how data was measured
    12·1 answer
  • Help
    13·1 answer
  • 2. Randy has a 500 g of water at 20°C. If he wants the final temperature of the water to be 75°C (the change in temperature will
    10·1 answer
  • The first plants to grow after a fire are called?
    8·2 answers
  • Please help me I promise I will give brainliest!
    13·1 answer
  • For the reaction of nitric oxide and oxygen to form nitrogen dioxide, the reaction begins with 12.0 g of nitric oxide and 12.0 g
    6·1 answer
  • Which statement correctly compares the masses of subatomic particles in an atom such as carbon?
    11·1 answer
  • An electrolyte can be checked to ensure that it has correct chemical composition by measuring its _____.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!