General Chemistry Answers

consider the chemical formula for one unit of sodium dichromate, Na2Cr2O7. how many total atoms would be present in 17 units of sodium dichromate

What's a atom

A student is titrating a 30mL solution of a 0.75M diprotic acid with 0.25M NaOH in a laboratory experiment. Given that Ka1 = 5.5 x10^(-5) and Ka2 = 2.8 x10^(-10), answer the questions that follow.

(A) Calculate the pH of the resulting solution after 60 mL of the strong base titrant has been added. Write answer in THREE SIGNIFICANT FIGURES. 

Briefly discuss five (5) importances of Biochemistry in Agricultural Science

How many grams of water are produced if 33.0 grams of N2O is produced?

How many moles of NO can be formed by reacting 3.7 moles of NO₂?

3 no2+h2o>2 hno3+no

if you have 0.57 solution of H2O how many moles do you have ?

The vapor pressure of water at 80°C is 0.4675 atm. Calculate the vapor pressure in kPa. Be sure your answer has the right number of significant digits.

An atomic clock is used to measure a time interval of 121.315 591 s. Assume you have to measure the same time interval. Give an example of a time interval you might actually measure if your measurement is: a) not accurate but precise (b) not precise but accurate. (c) both in accurate and imprecise.

An aqueous solution of ferric hydroxide has a specific gravity of 1.25 and a weight fraction of

solute equal to 0.10. Calculate:

a) % solute by mole

b) Molality of the solution

c) Normality of the solution

d) ppb of solute