Blog

Question 11a: The fluoride content of American toothpaste is given as 0.14% (w/w) for most brands. A German toothpaste labels the fluoride content as 1400 ppm. a) Does the toothpaste contain the same concentration of fluoride? Compare the concentration (in molarity) of both kinds of toothpaste considering water as solvent (d = 1g/mL) to give your answer. (Molar mass of F- = 18.99 g/mol)                       (6 points)

Question 10: A solution contains 4.1 mM CaCO3 and 6.2 mM Na2CO3 and 4.6 mM BaCO3. The p-function for CO32- is _____.             (6 points)                                             

Question 13c: The standard deviation for the values obtained from the new polycarbonate bottle is 0.6. Provide the formula needed to calculate the sample standard deviation.          (4 points)

Question 6: Indeterminate errors do not affect precision.                                     (3 points) (a) True (b) False

What does LSS stand for?

Which 2 artists had an ongoing rivalry and worked in close proximity as they both created frescoes that were commissioned by the Pope?

The prehistoric era covers art that was created before the invention of _________________

The existence of a Great Sphinx drawing by Frederic Louis Norden published in 1755 disproved a widespread myth that _________________________.

What were the decorative figurines intended to act as servants or minions for the deceased, should they be called upon to do manual labor in the afterlife?

What are images carved into rock surfaces through pecking, hammering, or abrading?