Answer:
18.01528
Explanation:
find this by adding the molecular masses of two hydrogen atoms and oxygen atom
The answe is 56 setup the word primooo
Answer:
to balance a chemical equation the amount of reactants must be equal to the amount of products, an easy way to balance it is write out how many you have on both sides
Explanation:
if you're dealing with molecular equations you would do it like this:
eg. A double displacement reaction between magnesium hydroxide and hydrochloric acid
Mg(OH)2 (aq) + HCl (aq) = MgCl2 (aq) + H2O (l)
Mg-1. Mg-1
O-2. O-1 *2
H-2. H-2
Cl-1 *2 Cl-2
Balanced eq: Mg(OH)2 (aq) + 2HCl (aq) = MgCl2 (aq) + 2H2O (l)
if you're dealing with ionic equations , you would deal with charges and you would need to cancel out spectator ions, like this:
Mg^2+(aq) + 2OH^-(aq) + 2H^+ (aq) + 2Cl^- (aq) = Mg ^2+(aq)+ 2Cl^- (aq) + H20 (l)
the spectator ions are the ones that are the same on both sides which would be the Mg^2+ and the 2Cl^- so when writing the net ionic equation, it would just be:
2OH^-(aq) + 2H^+ (aq) = + H20 (l)
C) chemical change, because burning gives new substances, but does not change nuclei of elements