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Keith_Richards [23]

3 years ago

9

Calcium phosphorus magnesium and fluoride mainly serve as structural components of

1 answer:

Ksju [112]3 years ago

5 0

The answer to this question would be: bones and teeth

Bones and teeth are made of calcium and fluoride. This makes the bone and teeth sturdy and able to take much more force. Bones are used to be the body framework and teeth is used to digest food. When the level of calcium in the blood is too low, the calcium from bones can be digested by osteoclast to increase the calcium level in the blood.

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Please help. im freaking out rn. i have like 40 missing assignments please

Katarina [22]

Answer:

I'm pretty sure its the one that says very little at the beginning but if I get it wrong I'm sorry

5 0

3 years ago

A pharmacist wishes to strengthen a mixture from 10%alcohol to 30% alcohol. How much pure alcohol should be added to 7 liters of

Tomtit [17]

Answer:

2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

Explanation:

Suppose x is the number of litres added to the 10% mixture than the quantity of new mixture is given as below

$n_{old}=7$ litres
$n_{new}=7+x$ litres

Also the quantity of alcohol is given as

$q_{old}=10 \% \, of \, 7 \, litres =0.7$

$q_{added}=x$

$q_{new}= 30 \% \,of \,new\, quantity = 0.3(7+x)$

Now the equation is as

$q_{old}+q_{added}=q_{new}\\0.7+x=0.3(7+x)\\0.7+x=2.1+0.3x\\x-0.3x=2.1-0.7\\0.7x=1.4\\x=2 \, litres$

So 2 litres of pure alcohol will be added to make the overall concentration of 9 litres of mixture as 30%.

8 0

3 years ago

Write the nuclear equation for the beta decay<br> of calcium-45.

TiliK225 [7]

Answer:

on https://www.ck12.org/book/peoples-physics-concepts/section/20.1/

Explanation:

it shows for calcium 45 and maybe a possible equation on 3/4th's scroll down?

6 0

3 years ago

What are things that amorphous and crystalline have in common?

Juliette [100K]

Six brick land llwnswel

5 0

3 years ago

The removal of silver tarnish from silverware using aluminum foil and a solution of electrolyte is an example of

eimsori [14]

Answer:

The answer is C. An electrochemical cell.

Explanation:

The aluminum ion react with the sulfide to form aluminum sulfide.

8 0

3 years ago