Other Chemistry Answers

Briefly describe the two processes commonly used to refine steel. Determine which of these processes would be more useful in a country where electricity is expensive; support your conclusion based on the description you have given.

The nitrogen dioxide content of air on a particular day was 0.150 ppm by mass.
The density of the air was 1.225kgm−3.
What was the mass of nitrogen dioxide in 1m3
of air on that day?

an aqueous solution that contains 285mg of trichloroacetic acid (Cl3COOH) (M.wt=163g/mol), in 10ml (the acid is 73% ionized in water).

Describe the experimental procedure to carry out a titration to find the exact volume of nitric acid needed to neutralise 25cm3 of potassium hydroxide solution and obtain pure, dry crystals of potassium nitrate.

Calculate the total volume of solution when
4 mol of water is mixed with 1 mol of ethanol.
Partial molar volumes of water and ethanol are
1.9 x 10^(-5 ) m3/mol 5.4 x 10^(-5) m3/mol
respectively

Calculate the total volume of solution when
4 mol of water is mixed with 1 mol of ethanol.
Partial molar volumes of water and ethanol are
1.9 x 10^(-5 ) m3/mol 5.4 x 10^(-5) m3/mol
respectively

When a star is very hot, its elements _______.

whether egg shell powder react with water?

A 10 gram mixture of C2H6 and C3H4 gases is combusted.During the reaction, 30.8 gram of CO2 gas is produced.Find the mass of C2H6 in the initial mixture.

Which of the following elements is not an important nutrient contained in commercial fertilizers?

A. Nitrogen. B. Phosphorus. C. Potassium. D. Oxygen.