Please help 1. How many moles of As (Arsenic) is in 250 g?
2. How many grams are in 14 moles of NaCl?
3. 2.5 moles of Carbon is how many atoms?
4. Which has more atoms? 35 grams of Fe (Iron) or 10 g of Li (Lithium).​

pie chart because it is in percents ( % )

answer : (a) volume of the gas = 8.67 ×   l

                (b) second virial coefficient b = -1.21226 l/mole

solution :   given,     t = 300k

                                p = 20atm

                                z = 0.86

                                n = 8.2 mmoles = 8.2 × moles

                                r =   0.082 l atm/k/mol

        find,     (a) volume of gas   and (b) second virial coefficient b at 300k.

formula used :            

                          and            

(a)            

                    = \times 0.082\times 300}{20}[/tex]

                    = 8.67 ×   l

(b)      

                    = (0.00867-1) × 8.659

                    = - 8.5839 l/mole

d) a person who learns about the world by observing it.

explanation:

scientist are people who discover why and how things are done and made in the world.