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Sergio039 [100]
3 years ago
5

Which of the following work mostly severaly affect a human population

Chemistry
1 answer:
Arada [10]3 years ago
6 0
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If Marie and Calvin dissolve 50 grams of KBr in 100 grams of water at 90oC, the solution is
hram777 [196]

Answer:

The solution is 50 %wt

Explanation:

50% wt is a sort of concentration and means, that 50 g of solute (in this case, the potassium bromide) dissolved in 100 g of water.

It is the same to say, that there are 50g of KBr for every 100g of H₂O

8 0
3 years ago
Which isotope is most commonly used in the radioactive dating of the remains of organic materials?
Zarrin [17]
(1) 14C also known as Carbon-14, is used to radio-date organic materials as well as earth materials.
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3 years ago
Give the four symbols for physical states of reactants and products, and tell what each means.
pshichka [43]
We are going to use table salt, NaCl as an example.

(s) = solid, eg the salt you put on your food is a crystalline solid. 
(l)  = liquid, if you melt salt it take on a liquid form
(g)  = gaseous, if you put enough energy in the salt will turn into a gas.
(aq) = aqueous, meaning in water or another solvent. If you put some table salt in water and stir it, it will dissolve, the NaCl molecules dont get destroyed but they dissolve becoming part of the liquid. 
6 0
3 years ago
What mass of silver chloride can be produced from 1.73 l of a 0.147 m solution of silver nitrate?
dsp73
36.49 gm using law of equivalent proportion
4 0
3 years ago
A closed container is filled with oxygen. the pressure in the container is 275 kpa . what is the pressure in millimeters of merc
miv72 [106K]
1 kpa = 7.5 mm of Hg  [Remember it or can be found on internet ]

So, 275 kpa = 7.5 x 275  =  2062.5 mm of Hg

8 0
3 years ago
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