General Chemistry Answers

It is desired to obtain a volume of 1.00 L of nitrogen (N2) at 100.00 C and 640.00 mmHg. How many moles of nitrogen (N2) would be required

What is the amount (in milligrams) of caffeine in a 50.0 mL 0.00793 M espresso coffee? (Caffeine is C,H,,N,O, with a molar mass of 194.2 g/mol) ...

Issue

ml put 25 of the aqueous solution of iodine concentration w / v 1% in suppressing the season, then added his 10ml of Alkrufum, requested the contents of the separating funnel for two minutes, and then separated organic from aqueous layer and then take 5ml from the water layer and Aoert solution Ayari sodium concentration M to thiosulphate 0.1 Vlzim him 1.8ml to reach the end of the calibration, the desired point:

1.ahsb percentage extraction.

2.ahsb concentration of iodine in the organic and aqueous phases after extraction destined for mol / l 3.ahsb coefficient distribution of iodine between the organic and aqueous phases at a temperature of the experiment.

Note: The atomic weight of iodine 1 = 126.9

How many oxygen atoms are in 4.00 moles of glucose?

formula mass of NaOH

the partial pressure of oxygen(o2) in air at sea level is 21kPa .the henry of o2 constant in water at 20 degrees celcius is 0.0000136 M/kPa .calculate the molar concentration of o2 in the surface water of a mountain lake saturated with air at 20 degrees celcius and an atmospheric pressure of 88.3kPa.

If you are asked to come up with a mnemonic device to easily teach the differences among the general structure of the classifications of organic compound, what will it look like?

Use Lewis structures to show how these pairs of atoms combine to form ionic compounds.

a. lithium and bromine

b. magnesium and iodine

c. sodium and nitrogen

Rank the following bonds from greatest to least polarity using electronegativity values and draw the dipole symbol applicable.

S-O

S-Cl

S-S

S-N

How many number of atoms does contain in 7g KOH(POTASSIAM HIDRO OXIDE)?