You opened up a new 500. ml bottle of robitussintm. the dosage is 1.1 tablespoon (tbs).
how many doses are in the bottle?
1 tsp. = 4.93 ml
3 tsp. = 1 tbs.
b)what is the mass of 35.2 ml of a saline (salt water) solution that has a density of 1.12 g cm−3?

30.73 Doses and 39.42 g

Explanation:

It is necessary to know the conversion factors in that manner change the initial 500 mL to the number of doses as follow:

And the for b. it is such necessary to take in account that 1 mL = 1

35.2 mL * 1.12 = 39.42 g

2b2t

explanation:

2b2t

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml