Question 1
The simplest formula of a substance is found to be CH
2O, and its approximate molar mass is found by experiment to be 93 grams/mole. What is the exact molar mass of this substance in grams/mole?
◦ 30.0
◦ 87.0
◦ 90.1
◦ 93.0
◦ 93.1
Question 2
The solid compound Na
3PO
4 contains:
◦ Na
+, P
5+, and O
2- ions
◦ Na
+ and PO
42- ions
◦ Na
3+ and PO
42- ions
◦ Na
3PO
4 molecules