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A component of a protein called serine has the following percent composition by mass: 34.95% C, 6.844% H, 46.56% O, and 13.59% N. It also has an approximate molar mass of 100 g/mol. Give the empirical and molecular formula of the given compund.
95.0 mL of H_2O is initially at room temperature (22.0C). A chilled steel rod at 2.0C is placed in the water. If the final temperature of the system is 21.5C, what is the mass of the steel bar?
the gravitational force exerted on a solid object is given by F=mg, where F is the force in Newtons, m is the mass in kg and g is the acceleration due to gravity (9.81m/s^2)
Result in the formation of an aliphatic carboxylic Acid. Occur in Claisen-Schmidt condensation mechanisms
what is ture when equal masses of a and b are reacted?
Calculate the number of grams of NaOH per 100ml to give a pH8.0 solution if pure water at pH7.0 is used in the experiment
What is the molarity of a solution prepared by adding 29.3 g of HNO3 to enough water to make 2 L of solution
how many calories are used to heat a 50g sample of water from 8.1 degrees celius to 27.4 degrees celcius?
an 8 g sample of a copper ore was dissolved in an acid solution and then reacted with NO3- from a KNO3 salt solution. it required 71.5 ml of a .155 M KNO3 solution to fully react the copper in the ore sample.
write a balanced equation for the reaction that occurs between the solutes. Calculate the concentration of each remaining ion in solution. Is the resultant solution acidic or basic
a toothpaste contains 0.24% by mass sodium fluoride, NaF and 0.30% by mass of triclosan, C12H7Cl3O2. The mass of one toothpaste is 119g. How many moles of C atoms are in the toothpaste.
Calculate the mass of methane that must be burned to provide enough heat to convert 151.0 g of water at 43.0°C into steam at 124.0°C.
lead (II) sulfide (PbS) has a Ksp of 3.0 x 10^-28 . what is the concentration of lead (II) ions in a saturated solution of PbS
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