Law of Conservation of Mass Worksheet

The actual mass of sodium ethoxide produced is 22.6 g. In writing a balanced equation for the reaction, which of the following statements explains why the mass seems to have decreased? Magnesium burns in the air to produce magnesium oxide. If a magnesium sample needs 15.0 g of oxygen to burn completely and forms 37.8 g of magnesium oxide, what is the mass of the magnesium sample? A 100 g tin sample undergoes a phase change from solid to liquid. Is the mass of liquid tin equal, less or greater than the mass of tin in the original sample? What is the expected mass of sodium ethoxide? Sodium (X) bicarbonate can be prepared depending on the given reaction: NaCl + CO + NH + HOX + NHCl2324 Use the principle of mass conservation to answer the following questions. Determine the relative mass of the formula for product X. Enter your answer as an integer. Which of these claims about mass conservation is not correct? This lesson contains 9 additional questions and 24 variations of additional questions for subscribers. Nickel reacts with a number of moles of carbon monoxide to form an organonickel compound. The equation for this chemical reaction can be written as follows: Ni+CONi(CO)nn5.9 g of nickel gives 17.1 g of Ni(CO)n. Determine the value of n at the nearest integer. The combustion of toluene takes place depending on the reaction shown. Oxygen toluene carbon dioxideWater + → + 92 g of toluene produced 308 g of carbon dioxide and 72 g of water. How many moles of oxygen were needed for the complete combustion of toluene? An open beaker contains 15.3 g of ethanol.

A 7.6 g piece of sodium is poured into the beaker and reacts completely to form sodium ethoxide (CHONa)25.