Chemistry Help Please?!?

Question

1. Which element can form a chloride with a general formula of MCl2 or MCl3?

   1. Fe
   2. Al
   3. Mg
   4. Zn


2. Which equation is correctly balanced?

   1. H2 + O2 H2O
   2. Ca + Cl2 CaCl
   3. 2H2 + O2 2H2O
   4. Ca + Cl2 Ca2Cl


3. The oxide of metal X has the formula XO. Which group in the Periodic Table contains metal X?

   1. Group 1
   2. Group 2
   3. Group 13
   4. Group 17


4. What is conserved during a chemical reaction?

   1. mass, only
   2. charge, only
   3. both mass and charge
   4. neither mass nor charge


5. What is the chemical formula for nickel (II) hypochlorite?

   1. NiCl2
   2. Ni(ClO)2
   3. NiClO2
   4. Ni(ClO)3


6. An unknown element X can form a compound with the formula XBr3. In which group on the Periodic Table would element X be found?

   1. 1
   2. 2
   3. 13
   4. 14


7. Given the reaction: Mg(s) + 2 AgNO3(aq)  Mg(NO3)2(aq) + 2 Ag(s)
Which type of reaction is represented?

   1. single replacement
   2. double replacement
   3. synthesis
   4. decomposition


Thanks!!

Anonymous · Accepted Answer

1. Iron! Fe +2 or Fe+3
(because it can form different ions in different cases)
2. 3 2H2+O2->2H2O
there are four hydrogens and two oxygens on each side, so it's balanced
3. 2 group 2
oxygen forms a -2 ion so it would form a 1 to 1 ionic compound with elements that form +2 ions, which are found in the second family of the periodic table.
4. 3 mass and charge
5. I think it's 2 but you can double check that by searching "nickel (II) hypochlorite" in google
6. 3 13 (or 3A) because they have a +3 charge
7. it looks like a single replacement reaction. don't forget the arrow in the middle.

I really hope you've tried all these before asking about them

? · Answer

Very interesting.

? · Answer

I really can't answer yer question..
but r u in agora?

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Chemistry Help Please?!?

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