Answer:
For more information about each chemical, view the safety data sheets. Click the Product Resources tab followed by Datasheet. You’ll need these materials: test tube rack test tubes (quantity: 6) test tube labels graduated cylinder wash bottle with distilled water (Tap water is acceptable, but it can skew the experimental results.) pipettes (quantity: 2) forceps 50-milliliter Erlenmeyer ask scoop test tube brush apron goggles gloves pen or re-tip marker small piece of sandpaper chemicals from Edmentum Lab kit: copper metal strip (quantity: 1) iron nails (quantity: 2) zinc metal strips (quantity: 3) copper(II) sulfate solution (10 milliliters) iron(III) nitrate solution (10 milliliters), also called ferric nitrate magnesium sulfate solution (10 milliliters) hydrochloric acid (30 milliliters) sodium bicarbonate (7.5 grams
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Explanation:
Answer:
The answer to your question is: letter C) 5730
Explanation:
Data
Originally Carbon - 14 254 g
Currently Carbon - 14 127 g
Half-life of Carbon -14 is when half of the original amount of Carbon disintegrates.
Then, if originally there were 254 and now there are 127, only one half life passed.
Half life of carbon -14 is 5730 years old.
Toxaphene is a kind of pesticides used to protect crops specially cotton crops.
It is present in both solid and gas form.
It has a piney odor.
The physical appearance of toxaphene is yellow in colour amber waxy form.
It is an organochloride insecticide.
In 1940 it was manufactured.
It is a different composition of 670 chemicals.
According to questions,
Given,
Mass of toxaphene = 10^-5 gm
Mass of soil = 100 gm
Toxaphene soil concentrations = 10^-5 / 100 = 10^-7 gm/gm
1 gm/gm = 109 ppb
Concentration in units of ppb =10^-7 * 109 ppb = 100 ppb
To know more about toxaphene here :
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Answer:
30
Explanation:
The atomic number of Zinc is 30.
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Have a supercalifragilisticexpialidocious day!
