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 n ...continues

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 limest ...continues

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 insol ...continues

Find volume of H2SO4 and HCl in a molarity problem?

What volume, in milliliters, of a 2.00 M aqueous KOH solution would be needed to neutralize a) 110.0 mL of 0.0550 M aqueous H2SO4? b) 45.00 mL of 2.50 M aqueous HCl?

Select correct balanced net ionic equation

Select the correct balanced net ionic equation for each of the following reactions, occuring in aqueous solution. Input the associated letter labels, in order (i)-(iii), no spaces, no commas. e.g. GBF (i) 2HCl + Mg --> H2 + MgCl2 (ii) CuSO4 + CaCl2 --> CuCl2 + CaSO4 (iii) Cu(NO3)2 + Ni --> Cu + Ni(NO3)2 A. CuSO4 + ...continues

Mass percentage of sodium chloride in a mixture

A sample of a mixture containing only sodium chloride and potassium chloride has a mass of 3.5650g. When this sample is dissolved in water and excess silver nitrate is added, a white precipitate (silver chloride) forms. After filtration and drying, this precipitate has the mass 7.9143g. What is the mass percentage of sodium ch ...continues

Redox reaction in acidic solution

I need to separate these into half reactions, and indicate the changes in oxidation state, then give the overall equation. First I put water into a test tube, then I added potassium permangate. Next I added sulfuric acid, and after mixing that together I also added potassium iodide. I understand how to balance redox equ ...continues

Thermodynamics

I understand most of the thermodynamic concepts (enthalpies, hess's law etc.) but I do not know how to approach this problem? I need to understand this for my mid-term. Can you provide a step-by-step analysis. Problem A sample of 22.7 g of a nongaseous, unstable compound, X, is placed inside a metal cylinder with a radius ...continues