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
Anit [1.1K]
2 years ago
5

Can somebody help? Do not answer if you don't know.

Chemistry
1 answer:
blondinia [14]2 years ago
5 0

Answer:

10.8amu

Explanation:

Given parameters:

Abundance of B - 10  = 20% = 0.2

Abundance of B - 11  = 80% = 0.8

Unknown:

Atomic mass of Boron = ?

Solution:

The atomic mass of Boron can be can be calculated using the expression below;

 Atomic mass  = (abundance of B - 10 x mass of isotope B - 10 ) +( abundance of  B - 11 x mass of isotope B- 11)

 Atomic mass  = (0.2 x 10) + (0.8 x 11) = 2 + 8.8  = 10.8amu

You might be interested in
The curiosity is important in the progress of science because it
nordsb [41]
It it important because it makes people wonder how things work and are made which makes it so they want to move forward with experiments <span />
3 0
3 years ago
Read 2 more answers
Why isn't there a lunar eclipse every time Earth is in between the sun and<br> the Moon?
DerKrebs [107]
Because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.
8 0
2 years ago
When a plant is entering the Calvin cycle of photosynthesis_____.
Andrei [34K]

B). light energy is not required to proceed

Explanation:

In the Calvin cycle of photosynthesis, light energy is not required. The Calvin cycle is light independent and it is made up of a series of redox reactions.

  • During photosynthesis reactions, green plants manufacture their food using carbon dioxide, sunlight and water.
  • During the Calvin cycle aspect, light energy is not required for chemical reactions to take place. The light energy helps to move electrons.
  • The cycle is also known as dark reactions.
  • It is at this stage that carbon dioxide combines with water to form glucose.
  • The reaction is initiated with light energy which produces NADPH and ATP.
  • The Calvin cycle follows by using the NADPH and ATP to produce glucose in the dark phase.

Learn more:

ATP brainly.com/question/2953868

Light dependent reactions brainly.com/question/6866300

#learnwithBrainly

4 0
3 years ago
Which of the following statements about decomposition reactions is true?
Andreyy89
C

Decomposition is of this form: A becomes B+C ... so after the reaction, the element A DECOMPOSES into two smaller elements, B and C.

Synthesis is the opposite: B+C becomes A AFTER THE REACTION.

Hope that helps :))
8 0
3 years ago
Read 2 more answers
Weather conditions (high or low temperature) to the mineral wool.
MrRissso [65]

Answer:

high temperature

Explanation:

3 0
2 years ago
Other questions:
  • 8.00ml of 1.25M lithiukm hydroxide is reacted with sulfuric acid. It is found that 52.87mL of the sulfuric acid is required to c
    10·1 answer
  • If a sample has a mass of 245.8 grams and takes up 94ml of space, what is the density of the sample?
    8·1 answer
  • Which of the following combines with harmful gases to create air pollution?
    11·1 answer
  • How are half reactions combine to give overall redox reaction
    14·1 answer
  • Please help! <br> I will make you brainliest!!!
    11·1 answer
  • 2 Points
    6·2 answers
  • The temperature of 15.71 grams of gold rises from 32°C to 1,064°C, and then the gold melts completely. If gold’s specific heat i
    10·1 answer
  • Why does nitrogen have the lowest volume in the atmosphere on average?
    10·1 answer
  • In 2011, the number of transplants in the United States was 26,745, and the number of donors was 14,146. What is most likely the
    15·2 answers
  • Which of these is an example of a literal equation?
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!