This is a timed quiz.
You have 10 minutes to complete the 5 questions in this quiz.
The relative molecular mass of NO2 is 46. This means that
NO2 is 46 times heavier than the mass of carbon-12
NO2 is 46/12 times heavier than 1 atom of carbon-12
NO2 is equal to 1/12 of the mass of 1 atom of carbon-12
NO2 is 46 times heavier than 1/12 x 12 of carbon-12
Find out how many times three chromium atoms are heavier than 4 oxygen atoms. [Cr = 52; O=16]
3.25
2.4
16
52
the percentage content of iodine in lead(||) iodide. PbI2 is [Pb = 207; I= 127]
55%
27.5%
38%
76%
Calculate the percentage mass by weight of metal M in the compound MCl4. [RAM: M=207, Cl= 35.5]
16.2%
14.6%
40.7%
59.3%
Three elements are represented by letters X, Y, and Z. One atom of Z is three times heavier than one atomof Y. One atom of Y is 2 times heavier than one atom of X. If the RAM of Z is 210, what is the RAM of X?
24
31
35
60
