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
tia_tia [17]
3 years ago
9

manganese-56 has a half life of 2.6 hours how much manganese would have disappeared after 7.8 hours if you started with 20g of m

anganese
Biology
1 answer:
mamaluj [8]3 years ago
7 0

Answer:

17.5 g of manganese-56

Explanation:

Now we have to use the formula;

N/No= (1/2)^t/t1/2

Where

N= mass of manganese-56 left after time (t) = ????

No= initial mass of manganese-56 present = 20 g

t= time taken for N mass of manganese-56 to remain = 7.8 hours

t1/2= half-life of manganese-56 = 2.6 hours

Then we substitute values;

N/20 = (1/2)^7.8/2.6

N/20 = (1/2)^3

N= (1/2)^3 ×20

N= 2.5 g of manganese-56

Mass of manganese-56 that has disappeared after 7.8 hours= 20 -2.5 = 17.5 g of manganese-56

You might be interested in
Different energy sources provide different benefits to individuals and the environment. What are some nonpolluting sources of en
Vikki [24]

Answer:

D the others are highly pollutant expesially nuclear and natural gas

Explanation:

3 0
3 years ago
How do you tell if physicalchange has occurred?
QveST [7]
No new substance is produced.
4 0
3 years ago
6. Phylogenetic trees are used for?
ivolga24 [154]

Phylogenetic trees show the evolutionary pathways and connections among organisms. A phylogenetic tree is a diagram used to reflect evolutionary relationships among organisms or groups of organisms.

3 0
3 years ago
In the human body, when a tissue becomes damaged, it is usually replaced with scar tissue. The liver is a unique organ because i
Whitepunk [10]

Given what we know, we can confirm that the principle from the cell theory that supports this finding is that existing cells are produced by other living cells.

<h3>What is the cell theory?</h3>

The cell theory is a scientific theory proposed in the middle of the 19th century. It attempts to explain the formation and role of cells. There have been many wrongful iterations of this theory until arriving at the current version that is widely accepted today.

Therefore, we can confirm that the principle from the cell theory that supports this finding is that existing cells are produced by other living cells.

To learn more about cells visit:

brainly.com/question/5763151?referrer=searchResults

5 0
3 years ago
The diagram shows a food web , In the food web - ( I NEED HELP ASAP )
IgorLugansk [536]
Krill, snails and abalones are primary consumers
6 0
3 years ago
Other questions:
  • Hydrological power harnesses energy through the movement of water in rivers. Which statement represents an added benefit to this
    15·1 answer
  • What are the processes in which materials move through a cell membrane?
    8·1 answer
  • An inadequate secretion of thyroid hormones results in ___________, which is characterized by weight gain and lethargy, while an
    8·1 answer
  • What kind of radios do weather balloons carry?
    14·1 answer
  • Nucleic acids are composed of:
    12·2 answers
  • The functions of the urinary system include ________.
    6·1 answer
  • At the very beginning of translation, the first tRNA molecule __________. Attaches directly to the DNA codon connects an amino a
    11·1 answer
  • The chemical process for respiration
    8·2 answers
  • 21 Which pair of substances is transported in the phloem?
    12·2 answers
  • PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!