You do an experiment in which you need 0.5 mole of tyrosine (c9h11no3) .

how many grams must you weigh out?

65 g

90.5 g

181 g

272 g

90.5 g

Explanation:

we know 1 mole of thyrosine = 181g

so 0.5 mole thyrosine =181*0.5

                                      =90.5g

Option (b) is the correct answer.

Explanation:

Number of moles given are 0.5 mol and molar mass of tyrosine () is 181.19 g/mol.

Therefore, calculate the mass of given molecules follows.

   No. of moles of tyrosine =

                              0.5 mol =

                           mass = 90.595 g

Therefore, we can conclude that mass of 0.5 mole of tyrosine () is 90.5 g.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.