Balancing an equation...

Write the stoichiometric equation for magnesium nitride plus water yields magnesium hydroxide and ammonia gas.

balance an equation

How to balance an equation especially when there are many symbols and formulas in and out of parantasese () I have a test coming up this Thursday, and I am at a lost. Can you help, this is my second time taking this course so I must pass it with an "A"

Percent composition and chemical formulas

1. Sn exists in earths crust as SnO_2. calculate the % composition by mass of Sn and O in SnO_2 2. PAN is one of the components of smog. it is a compound of C,H,N and O. determine the % composition of oxygen and the empirical formula from the following % composition by mass: 19.8%C, 2.50%H, 11.6%N. 3. how many grams of S are needed to react completely with 246 g of Hg to form HgS? 4. what is the mass of F in grams, in 24.6g of SnF_2? 5. the molar mass of caffeine is 194.19 g. is the molecular formula C_4H_5N_2O or C_8H_10N_4O_2? 6. MSG has the following composition by mass: 35.51%C, 4.77%H, 37.85%O, 8.29%N, and 13.60%Na. what is its molecular formula if its molar mass is 169 g? 7.balan... click for more

Formulas, reactants and products

1. consider the combustion of CO in oxygen gas: starting with 3.60 moles of CO, calculate the number of moles of CO_2 produced if there is enough oxygen gas to react with all of the CO. 2. CaCO_3 is decomposed by heating to CaO and carbon dioxide. calculate how many grams of quicklime (CaO) can be produced from 1.0 kg of limestone (CaCO_3). 3. N_2O can be prepared by the thermal decomposition of NH_4NO_3. the other product is H_2O. write a balanced equation for this reaction. and how many grams of N_2O are formed if 0.46 mole of NH_4NO_3 is used in the reaction? 4. in one experiment 0.886 mole of NO is mixed with 0.503 mole of O_2. calculate which of the two reatants is the limiting reage... click for more

Solution reactions

1. identify each of the following substances as strong electrolyte, weak electrolyte, or nonelectrolyte:Ba(NO_3)_2, Ne, NH_3, NaOH. 2. predict and explain which of the following systems are electrically conducting: solid NaCl, molten NaCl, an aqueous solution of NaCl. 3. characterize the following compounds as soluble or insoluble in water: Ca_3(PO_4)_2, Mn(OH)_2, AgClO_3, K_2S. 4. write ionic and net ionic equations for the following reactions: Na_2S(aq) + ZnCl_2(aq) --> 2K_3PO_4(aq) + 3Sr(NO_3)_2(aq)--> Mg(NO_3)_2(aq) + 2NaOH(aq)--> 5. identify each of the following species as a Bronsted acid, base, or both: PO^3-_4, ClO^-_2, NH^+_4, HCO^-_3. 6. balance the following equations and w... click for more