Balance the following chemical questions

1. SnO2+H2--> Sn+H2O

2. FeS+O2--> Fe2O3+SO2

3. C2H6O+O2-->CO2+H2O

4. AgI+Na2S-->Ag2S+NaI

5.00 g of an unknown compound was dissolved in 250.0 mL of water. The unknown compound was found to be a non-electrolyte and the osmotic pressure of the solution was determined to 14.5 atm at 298 K.

4. Choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. I chose Hydrogen Chloride. The chemical formula is HCI.

Is the standard for the meter kept in france

What is the molar mass of acetylene C2H2?

Calculate the density of mercury if 1.00x10^2g occupies a bolume of 7.36 cm

14. Two or more substances that are together but do not combine to form a new, pure substance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Balance the following equation with the smallest whole number coefficients. Choose the answer that is the sum of the coefficients in the balanced equation. Do not forget coefficients of "one". RbOH + H3PO4 → Rb3PO4 + H2O

What is the temperature of 100 liter container having 1 mole of an ideal gas at a pressure of 20 kilopascals

5.2*10^26 molecules of ch4 in volume