Other Chemistry Answers

calculate the pH of a solution formed by mixing 40ml of 0.1M HCL with 60 ml of water.

how do you determine how many moles of Pb are equivalent to 9.51 x 10^3 g Pb

regulatory agancies and government health departments require business that serve the public to..
a. complete a self-evaluation prcedure
b.follow prescribed sanitary precautions
c. create individal sanitary precautions
d.have an employee orientation procedure

How many grams of zinc metal must be dissolved in sulfuric acid in order to obtain 500 cubic centimeters of hydrogen at 20 degrees Celsius and 770 torr? Zn(s) + H2SO4 = ZnSO4 + H2(g

How many Liters of oxygen (O2) can be obtained from the decomposition of 100 grams of potassium chlorate (KClO3)? Assume zero degrees Celsius and 1 atmosphere pressure. The other product is potassium chloride.

Exactly 500 cubic centimeters of a gas at 1 atmosphere and 0 degrees Celsius weighs 0.581 grams. The composition of the gas shows it to be composed of only carbon and hydrogen, the carbon being 92.24%. What is the molecular formula of this gas?

You are the public health officer in the water treatment facility for a city of 50,000 people. A concentration of 1.0 ppm of flourine in the drinking water is sufficient for the purpose of helping to prevent tooth decay. (1 ppm means "one part per million," or 1 g of flourine per one million grams of water). The compound normally chosen for flouridation is the same as is found in some toohtpaste's sodium flouride. You know that sodium flouride is 45% flourine by mass. Calculate how many kilograms of sodium flouride you will need to have in order to flouridate the city's water supply for one year, based upon your estimate that the average daily consumption of water is 150 gallons per person. (1 gallon = 3.79 L; 1 year = 365 days; 1 ton = 2000 lb; 1 lb = 456.3 g; density of water = 1.0 g/mL )

When we trace the development of atomic theory, we can see how the early form of an idea is modified rather than thrown out by later discoveries. Do you recognize parallels to this modification of basic ideas in other kinds of human experience? Explain please.

explain the types of chemicals in human body?

The pKa of one of the hydrogens that is attached to one of the nitrogens of the purine guanine is 9.7. If guanine is in a solution that has a pH of 10.2, then what fraction of the guanine molecules would be in the protonated form at this pH?