Blog

What is the mass of 0.432 moles of C8H9O4? Consider one mole and go from there.

What is the percentage of composition of HClO3? HINT: Consider one mole in grams.

Add  these measured values and give the correct sum: 3.201 + 0.0325  + 10.0400 = ?

How many moles of solute are there in 754 mL of a 0.250 M NaCl solution? Hint: Rearrange the equation for the definition of molarity. Cancel units.

Which of these is the sulfate ion?

What is the mass of 0.432 moles of C8H9O4? Consider one mole and go from there.

How many zeroes are significant in this number?   0.08030200 grams

Calculate the following result to the correct number of digits.      (Use only digits which are significant.)       (3.69 x 10‑4)  (4.5911 x 107)       (7.311 x 10‑2)  ( 23.59 x 1017)    =     

How many atoms of H are there in 39.2 g of H2S?  Consider the mass of one mole. 

How many zeroes are significant in this number?   0.08030200 grams