Question

NAME SECTION DATE PREABORA 1. In your own words, define the following terms: empirical formula firing to red heat beating to constant weight molecular formula weighing by difference 2. Why are the empty crucible and cover fired to red heat? 3. How critical are the suggested times for heating and cooling? 4. Why is distilled water added to the crucible after igniting the magnesium metal? 5. How can you tell when the magnesium metal has reacted completely? 6. How can you tell when the copper wire has reacted completely and the excess sulfur has bumed off?

Answer 1

Oighin by differeuu Tuis is tue most accurate metho d t measure quautitatively tue mass of a solid sauple. of a coe oing Tuis imvolves epetative weigluimg bot le comtaimi mg a quauti ty of selid reageuts Tue differeue im te too masses represeuts te mass of selid veageut trausferred to tha Vessel QH& wy are the eupty cruuble and lover fired to read eat 9 Tue euuptccible aud cover are fre to red heat im order to by off impyiig im tha coucible aud to establish a coms tat

PO Detme- O empivical fermula- Eanpiical feranula of a cluuica Com poum i s Hue sionples Positjve oyteger atto of atoms preseutim com pouma Ex Tua Melecular fortmula of buteua C4 Hg eupirical formulaCH irito red laat Heating alouos red, is alled firimg to a cruible um il red haat Heating to comstait weiglt Heatimg to a comstaut iglat meauing to the mma ss of substaua heat a substause umti reuaim comstaut It is a gauimatric tehmique Moleular formula Tue moleula formula i's tue expre ssiem of tue mymber of atoms eal elemet im ome moleule of compoumd-