Methyl chloromethyl ether is an organic compound with the formula CH3-O-CH2Cl. This liquid is a very good solvent and it has a density of 1.0605 g/cm3at 20 ºC and a molar mass of 80.52. g. a) What is the mass in grams of 8.2 x 1011molecules of this compound? b) What is the mass in grams of the oxygen present in 6.47 cm3of this liquid. c) How many hydrogen atoms are there in 2.3 x 1019molecules of methyl chloromethyl ether? d) How many molecules of methyl chloromethyl ether are there in 13 drops of this solvent?

For a patient with the following pes statement and interventions, which would be the most appropriate monitoring and evaluating data? pes statement: inadequate calcium intake related to food and nutrition related knowledge deficit as evidenced by statements that the only dietary source of calcium is milk and she believes that she is lactose intolerant. patient’s nutrition prescription is for a diet providing 1200 mg calcium per day. patient was provided with in-depth nutrition education on alternative dietary and supplement sources of calcium. a. calcium intake (at subsequent visit) b. knowledge assessment by asking patient to identify food sources from menus and shopping list (at the end of the current visit) c. serum calcium (at next visit) d. both a and b e. both a and c

What are the similarities of physical and chemical change ?

Which of the following has wavelength longer than the wavelength of viable light? a) x rays b) gamma rays c) radios waves d) ultraviolet waves