Magnesium bromide contains 39.55% of magnesium by mass. Use this percentage to calculate the mass of bromide in grams contained 35.45 g of magnesium bromide. What are the definition of ionic compound, isotopes, and chemical formula? What is total atomic weight for copper, if the atomic mass (62.93 amu) and percentage (69.09%), and second isotope of copper mass (64.9278 amu)? Name of each following compounds: 1) CCl_4 2) BCl_3 3) SF_6 4) N_2O_4 Write the formula for the following compounds: 1)silver nitrate 2potassium hydroxide 3)sodium sulfate A 0.77 mg sample of nitrogen reacts with chlorine to form 6.61 mg of the chloride. What is the empirical formula for the nitrogen chloride.