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emmasim [6.3K]
3 years ago
15

How many grams of calcium would be a typical amount in a 60-kg adult?

Chemistry
2 answers:
djverab [1.8K]3 years ago
5 0
Between 1.00 & 1.5 grams would be the normal amount
tigry1 [53]3 years ago
3 0

the amount of elements may vary from person to person however based on analysis, averages and trends the composition of human body is like it mainly contains about 60% of oxygen by mass, 23% of carbon by mass, 10% hydrogen,2.5% nitrogen and then near by 1.4-1.5% of calcium

Thus if a man is weighing 60kg then the approximate or expected amount of calcium will be :

1.4% X 60kg = 0.84 kg

We may say that it will have 800-900 grams of calcium in its body.

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Which buffer system is found in the human body?
AveGali [126]

Answer:

Bicarbonate buffer system

Explanation:

The human body uses a bicarbonate buffer system to maintain blood pH at a reasonable level. Without it, we'd be dead.

7 0
3 years ago
Read 2 more answers
Assume that you have developed a tracer with first-order kinetics and k = 0.1 s − 1 . For any given mass, how long will it take
anygoal [31]

Answer: It will take 6.93 sec for tracer concentration to drop by 50% and 13.9 sec for tracer concentration to drop by 75%

Explanation:

Expression for rate law for first order kinetics is given by:

t=\frac{2.303}{k}\log\frac{a}{a-x}

where,

k = rate constant  =0.1s^{-1}

t = age of sample  

a = let initial amount of the reactant  = 100 g

a - x = amount left after decay process  

a) for tracer concentration to drop by 50%

a - x = amount left after decay process   = 50

t=\frac{2.303}{k}\log\frac{100}{50}

t=\frac{0.693}{0.1}

t=6.93sec

It will take 6.93 sec for tracer concentration to drop by 50%

b) for  tracer concentration to drop by 75 %

a - x = amount left after decay process   = 25

t=\frac{2.303}{k}\log\frac{100}{100-75}

t=\frac{2.303}{0.1}\times \log\frac{100}{25}

t=13.9sec

It will take 13.9 sec for tracer concentration to drop by 75%.

5 0
3 years ago
Type the correct answer in the box. Express your answer to two significant figures. An industrial vat contains 650 grams of soli
nikklg [1K]

88.98 %

The Balance Chemical Equation is as follow,

                                  2 HCl + Pb(NO₃)₂     →    2 HNO₃ + PbCl₂

According to equation,

          331.2 g (1 mole) Pb(NO₃)₂ produces  =  278.1 g (1 mole) PbCl₂

So,

                 870 g of Pb(NO₃)₂ will produce  =  X g of PbCl₂

Solving for X,

                     X  =  (870 g × 278.1 g) ÷ 331.2 g

                     X  =  730.5 g of PbCl₂

Therefore,

               Theoretical Yield =  730.5 g

Also as given,

                Actual Yield =  650 g

So using following formula for percentage yield,

                        %age Yield  =  (Actual Yield / Theoretical Yield) × 100

Putting values,

                        %age Yield  =  (650 g / 730.5 g) × 100

                        %age Yield  =  88.98 %

Brianliest please and thank you.

6 0
3 years ago
What is called mother liquor in a chemistry lab?
Paladinen [302]
The mother liquor<span> is the part of a solution that is left over after it crystallizes.  An example of a place you could find this is in sugar refinement.</span>
7 0
3 years ago
A cylinder is fitted with a moveable piston that can be raised and lowered. What would result in an increase in the pressure of
juin [17]

Answer:

decrease the volume of the cylinder.

Explanation:

In order to be able to solve this question we have to understand what Boyle's law is. According to Boyle's law; at constant temperature the pressure of a given mass of gas is inversely proportional to to its volume.

The Boyle's law shows us the relationship between the pressure and the volume. So, the Important thing to note hear is that if the volume in a container is decreased then the pressure will increase (and vice versa) due to the fact that as the volume decreases the particles in that container makes more collision which will make the pressure to increase.

Since, the piston is moveable it means that we can decrease and increase the volume in the cylinder. So, if the decrease the volume of the cylinder then we will have an increase in the pressure of the gas below the piston.

4 0
3 years ago
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