As percent composition of an element remains constant in a compound

Be sure to answer all parts. A compound of cesium and iodine contains 94.23 g of...
A compound of cesium and iodine contains 52.01 g of metal and 49.37 g of nonmetal. How many grams of cesium are in a 85.15−g sample of the compound? How many grams of iodine? _g Cs _g I
Be sure to answer all parts. A compound of copper and sulfur contains 86.61 g of metal and 43.24 g of nonmetal. How many grams of copper are in 5406 kg of the compound? How many grams of sulfur? *10 gCu * 10 gs Enter your answer in scientific notation.
Be sure to answer all parts. A 325 mL sample of solution contains 24.3 g of CaCl2. (a) Calculate the molar concentration of Cl− in this solution. 1.35 M - this one was correct. (b) How many grams of Cl− are in 0.300 L of this solution? (I got 4.79 g - don't know what i'm doing wrong for this part. Please help!)
Consider a 87.7 g sample of the compound cesium phosphate. Determine how many moles of cesium are in 87.7 grams of cesium phosphate.
Question 1: Be sure to answer all parts. Calculate the maximum numbers of moles and grams of iodic acid (HIO3) that can form when 622 g of iodine trichloride reacts with 124.1 g of water: ICl3 + H2O → ICl + HIO3 + HCl [unbalanced] mol HIO3? g HIO3? What mass of the excess reactant remains in grams? Question 2: Be sure to answer all parts. When 0.107 mol of carbon is burned in a closed vessel with 5.06 g...
Be sure to answer all parts. Magnesium oxide (Mgo) forms when the metal magnesium burns in air. (a) If 1:28 g of MgO contains 0.769 g of Mg, what is the mass ratio of magnesium to magnesium oxide? Mg to Mgo (b) How many grams of Mg are in 199 g of Mgo? g Mg
21.Be sure to answer all parts. The dissociation of molecular iodine into iodine atoms is represented as I2(g) ⇌ 2I(g) At 1000 K, the equilibrium constant Kc for the reaction is 3.80 ×10−5. Suppose you start with 0.0461 mol of I2 in a 2.27−L flask at 1000 K. What are the concentrations of the gases at equilibrium? What is the equilibrium concentration of I2? What is the equilibrium concentration of I?
Be sure to answer all parts. A mixture of 0.0921 g of hydrogen and 0.0456 mol of oxygen in a closed container is sparked to initiate a reaction. How many grams of water can form? g H2O ? Which reactant is in excess, and how many grams of it remain after the reaction? hydrogen oxygen g?
Be sure to answer all parts. Determine how many grams of each of the following solutes would be needed to make 2.40 × 102 mL of a 0.100 M solution. (a) cesium bromide (CsBr): g (b) calcium sulfate (CaSO4): g (c) sodium phosphate (Na3PO4): g (d) lithium dichromate (Li2Cr2O7): g (e) potassium oxalate (K2C2O4): g
Be sure to answer all parts. Kc for the reaction of hydrogen and iodine to produce hydrogen iodide. H2(g) + I2(g) ⇌ 2HI(g) is 54.3 at 430°C. Calculate the equilibrium concentrations of H2, I2, and HI at 430°C if the initial concentrations are [H2] = [I2] = 0 M, and [HI] = 0.419 M. [H2] = [I2] = [HI] =