You are asked to perform an experiment to determine the density of square block below. In order to complete your calculations you will need to (AKS 1b, DOK1).

A 2.540 g sample of an oxide of tin was heated in the air until the mass of the sample no longer changed, and 2.842 g of tin (IV) oxide (SnO2) was obtained as a result of the heating. b) What is the mass of tin in the final sample?

10. Copper has two naturally occurring isotopes, 6Cu (isotopic mass = 62.9296 amu) and 6Cu (isotopic mass = 64.9278 amu). If copper has an atomic mass of 63.546 amu, what is the % abundance of each isotope?

Anhydrous CuSO4 is converted to CuSO4・xH2O to absorb water from certain liquids. What is the value of x if 24.3 g of anhydrous CuSO4 is required to remove 13.7 g of H2O from a gallon of gasoline?  Relative atomic masses:H = 1.008;  O = 15.999;  S = 32.06;  Cu = 63.546

On this page just do number 10

An atom of rhodium (RhRh) has a diameter of about  2.7×10−8cm2.7×10−8cm. How many RhRh atoms would have to be placed side by side to span a distance of  6.0 μm?

Determine the mass in grams of 7.75 x 1021 atoms of carbon. (The mass of one mole of carbon is 12.01 g.)

2 Br₂ CH OH 1) BH 2) ОН: Н20 H202 OCH3 OEt

A student has been tasked to determine the percent water in thalium (III) nitrate, Tl(NO3)3 . xH2O. How would the calculated amount of water affected by each of the errors listed below? Would the determination of the amount of water be incorrectly high or low? You must explain your reasoning in order to receive credit. a) Following heating, the sample was allowed to stand in the open air overnight allowing it to absorb moisture before measuring its mass. b) The sample was heated too strongly resulting in the formation of NO2 (g)

Chemistry