An ion has 8 protons, 9 neutrons, and 10 electrons. The symbol ...

[Yi-Chen]

An ion has 8 protons, 9 neutrons, and 10 electrons. The symbol for the ion is ________.
 
  A) 17O2-
  B) 17O2+
  C) 19F+
  D) 19F-
  E) 17Ne2+

Question 2

Determine the volume of O2 (at STP) formed when 50.0 g of KClO3 decomposes according to the following reaction. The molar mass for KClO3 is 122.55 g/mol.
 
  2 KClO3(s)  2 KCl(s) + 3 O2(g)
 
  A) 9.14 L
  B) 8.22 L
  C) 12.3 L
  D) 13.7 L
  E) 14.6 L

Question 3

A mass of mercury occupies 0.950 L. What volume would an equal mass of ethanol occupy? The density of mercury is 13.546 g/mL and the density of ethanol is 0.789 g/mL.
 
  A) 0.0553 L
  B) 0.0613 L
  C) 16.3 L
  D) 18.1 L

[Pswine]

Answer to Question 1

A

Answer to Question 2

D

Answer to Question 3

C

[Yi-Chen]

Wow, this really help

[bdobbins]

TYSM