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In reading Dr John Gribbin book Almost Everyone Guide to Science page 250 he states that One Cubic Centimetre of air contains 4.5^19 (45 billion billion) molecules at 0C and 1 atmosphere of pressure.How is this calculated? A worked example would be appreciated.
In the following reaction, identify the Lewis acid and Lewis base. + + Ag +2NH Ag(NH ) 3 3 2
Molybdenum forms body-centered cubic crystals and at 20 oC the density is 10.3 g/mL. Calculate the distance between the centers of the nearest molybdenum atoms.
The mass of an empty container is 93g the mass of the container filled with water is 119g what is the volume of the container?
the density of water is 1g/cm^3
answer in terms of cm^3
I have two formulas for making Silver Thiosulfate at 3 mM concentration.
I’m confused – not a Chemist at all... (Used for ethylene blocking in plant tissue)
Formula 1
(DeBacco University)
23.81 g NaS2O3.5H2O (Sodium Thiosulphate)
2.04 g AgNO3 (Silver Nitrate)
2 liters distilled water
Dissolve NaS2O3.5H2O in 500 ml
Dissolve AgNO3 in 500 ml
Add AgNO3 to NaS2O3.5H2O solution.
Add 1liter, to get 3 mM
Formula 2
Sigma-Aldrich
1.58 g NaS2O3.5H2O (Sodium Thiosulphate)
1.7 g AgNO3 (Silver Nitrate)
Dissolve NaS2O3.5H2O in 100 ml
Dissolve AgNO3 in 100 ml
Add 20ml AgNO3 to 80ml NaS2O3.5H2O solution = 100 ml of.02 M STS solution
Add to above 100ml, 557 ml water to get 3mM solution
Thanks
A chemist prepares a solution of copper(II) sulfate (CuSO4) by measuring out 53. g of copper(II) sulfate into a 500. mL volumetric flask and filling the flask to the mark with water.
Calculate the concentration in mol/L of the chemist's copper(II) sulfate solution.
Be sure your answer has 2 significant digits.
How is learning crystal structure relevant in the study of engineering
