A student started with a sample of Cu of 8.66 grams . After the sample was burned in air, the resulting oxide had a mass of 11.64 grams. The mass of oxygen in the oxide is

When 4.008 g of sulfur is burned completely in abundant air, it combines with oxygen to form a single gaseous product with a total mass of 10.008 g. What is the mass percent of sulfur and oxyegn in the gaseous product?

Calcium nitrate (Ca(NO3)2) and ammonium fluoride (NH4F) react to form calcium fluoride (CaF2), dinitrogen monoxide (N2O), and water vapor (H2O). In one experiment, 16.8 g of calcium nitrate and 17.5 g ammonium fluoride were allowed to react completely. What mass of N2O was produced in the reaction?

A researcher exposes 11.89 g of pure iron to a stream of oxygen gas until it reacts to produce16.99 g of a pure oxide of iron. a. What is the mass of oxygen in the product? b. Calculate the empirical formula of the oxide of iron formed.    What is wrong with this statement: “The molecular mass of magnesium chloride is 62.30 g/mol”

A student, Ken, is given a mixture containing two carbonate compounds. The mixture includes MgCO, and (NH, ),CO,. The mixture is 69.14% CO, is by mass. What is the mass percent of MgCO, in the mixture? mass percent of MgCO,: とTOOLS x10 3,438 19 ON A tv MacBook Air DD 80 000 000 F12 F8 F9 F10 F11 F7 of

The distinctive taste of vanilla arises from an organic compound composed of only carbon, hydrogen, and oxygen. Burning 30.4 g of this compound with excess oxygen produced 70.4 g CO2, and 14.4 g H2O. In a separate experiment, the compounds molecular mass was determined to be 150.1 g/mol. Based on this information, determine the molecular formulaof this compound.

A 0.500 g mixture of Cu₂O and CuO contains 0.425 g of Cu. What is the mass of CuO in the mixture? Give 3 sig figs in your answer.

2. In Alice's Wonderland, every element is different from those in our world. There is a pure unknown compound that consists of element 2 (atomic mass: 22.01 amu) and clement ¥ (atomic mass: 3.13 amu). After elemental analysis of the compound, you discovered that it consists of 70.1 wt. % of clement N and 29.9 wt. % of element V. Answer the following questions. A. What will be the empirical formula of the compound? B. What will be the molecular formula of the compound if the molecular mass of the compound is 94.2 amu?

A 1.125-gram piece of magnesium was burned in the presence of oxygen, forming 1.866-grams of the binary oxide compound.  How many moles of oxygen are present in the compound?  Please report your answer WITHOUT units, and WITH the correct number of significant figures.

In a combustion reaction, 38.2 g of hydrocarbon reacts with 96.0 g of oxygen to produce water and carbon dioxide. If 53.8 g of water is produced, how much carbon dioxide is produced?