Question

#6,7,8,9

6. Bismuth nitrate, Bi(NO3)2, is used in the production of some luminous paints. How many grams of pure bismuth are in a 268 g sample of bismuth nitrate? 7. A 5.00 g sample of borax, Na2B.07.10H2O, was thoroughly heated to remove all of the water of hydration. What mass of anhydrous sodium tetraborate remained? 8. What mass of water is present in 25.0 g of magnesium chloride dihydrate? 9. What mass of manganese is present in 5.00 g of potassium permanganate?

Answer 1

269 sapl man q fiNo,)2 olar 2012011+3*16) C209 124) gino 333 guo" 333 gmel" in Bifvomsloiuk О. еои иоe a There molar mass El atom : 201 mn o. 804 uo wass илo! NazBya +1o0 nola Aa Bya: 10 20 qives 10 total dehyarah. So, mous 1 2о 2e1.3 nol no. q molos 31 37 s0.013 ms 10X O.013 mo ziue So, thi aumscint uil

O.12 ms is Imste o13 wste o 2-311 2.3 was uyaated яе wained enlaydrou pocinn п0 mas Tetouborat i 2.66 a Maguesium chloudo dihydrat molar ma oM C220 131. 2 g wo ma 2 40 36 e иоle o Mgag2120 percent watar in 271-1 131. 2 auater wiu 25.0 a amPle man also he 2 6.85 25 x 21.y 158 gwet Potassium peamomganat KMno mas Mn 51. amo 1 Mn im man 1S8 31. in5.ou кми Oy Mn mas 1. 425