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Travka [436]
2 years ago
12

Plz help if you can added photo.

Biology
1 answer:
Agata [3.3K]2 years ago
8 0

Answer:

i think they are asking for how many electrons so maybe 2 or 1s^2

Explanation:

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Potassium has a half-life of 12 hours. What fraction of a 100g sample is left after 48 hours
EastWind [94]

Answer:

After 48 hours amount left = 6.25 g

Explanation:

Given data:

Half life of potassium = 12 hours

Total mass = 100 g

Mass left after 48 hours = ?

Solution:

Number of half lives passed:

Number of half lives = Time elapsed / half life

Number of half lives = 48 hours/ 12 hours

Number of half lives = 4

At time zero = 100 g

At first half life = 100 g/ 2 = 50 g

At 2nd half life = 50 g/2 = 25 g

At 3rd half life = 25 g/2 = 12.5g

At 4th half life = 12.5 g/2 = 6.25 g

4 0
3 years ago
Sickle disease cell is a recessive genetic disorder. How many copies of the mutated gene (HbS allele) do you need to develop ful
solmaris [256]

Answer:

<u>It takes two copies of the mutant gene.</u>

Explanation:

<em>One from each parent, to give somebody the all-out sickness. Numerous individuals have only one duplicate, the other being typical.</em>

<em />

Hope this helped and have a great afternoon!

<em>~ChokieWokie~</em>

6 0
2 years ago
Parasitism is an example of
maw [93]

Answer:

Parasitism is a relationship between two different organisms where one of the organisms actually harms the other through the relationship. The organism that is harming the other one is called a parasite. Examples of Parasitism: Fleas or ticks that live on dogs and cats are parasites.

Explanation:

4 0
3 years ago
he removal of waste from Florida’s East Bay and Pensacola Bay is intended to speed the bay ecosystem’s natural tendency to do wh
Trava [24]
I think it is D but I am not for sure
7 0
3 years ago
Options for #2:<br> -carry<br> -design<br> -argue<br> -sabotage<br> -disprove
qwelly [4]

Scientists use labs to Design and Carry out experiments.

6 0
3 years ago
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