Suppose a student measured the mass of a sample that has a known mass of 40.5809 g using an analytical balance. The mass they observed was unstable, constantly jumping between 39.5 and 41.5. Choose all of the following reasons that could cause this error.

The following prompt will be used to answer the first six questions. An experiment was performed to separate the components of a binary mixture composed of sucrose (sugar) and sand. The following data was collected in lab during the experiment. Mass of original binary mixture: 20.100 ± 0.001 g Mass of initial filter paper: 21.206 ± 0.001 g Mass of filter paper and isolated sand: 25.226 ± 0.001 g q3 Given the data and information in the prompt, what is the calculated absolute error on the percent of sand in the mixture? Enter the absolute error you calculated in the box below. You do not need to include the % symbol with your answer.

An elderly patient is prescribed 60 mg flurbiprofen to manage pain from rheumatoid arthritis. The smallest weighable quantity of the compounding pharmacy's scale is 210 mg. Using the aliquot method, what is the smallest total weight of the diluentthat you could add to the mixture?

4 The mixture used in today's experiment was prepared as a 1:1:1 mixture (by mass) of sand, salt, and salicylic acid. Do your results for the mass of each recovered solid indicate a 1:1:1 composition of the mixture? Explain your response.