Oxygen molar mass

How many grams of oxygen (molar mass = 32) will be produced by the reaction of 2 moles of O3 ... 

Dimefoylhydrazine, foe fuel used in foe Apollo lunar descent module, has a molar mass of 60.10 g/mol. It is made up of carbon, hydrogen, and nitrogen atoms. The combustion of 2.859 g of the fuel in excess oxygen yields 4.190 g of carbon dioxide and 3.428 g of water. What are foe simplest and molecular formulas for dimefoylhydrazine ... 

J.9 You are asked to identify compound X, which was extracted from a plant seized by customs inspectors. You run a number of tests and collect the following data. Compound X is a white, crystalline solid. An aqueous solution of X turns litmus red and conducts electricity poorly, even when X is present at appreciable concentrations. When you add sodium hydroxide to the solution a reaction takes place. A solution of the products of the reaction conducts electricity well. An elemental analysis of X shows that the mass percentage composition of the compound is 26.68% C and 2.239% H, with the remainder being oxygen. A mass spectrum of X yields a molar mass of 90.0 g-moF. (a) Write the empirical formula of X. (b) Write... 

J.10 (a) White phosphorus, which has the formula P4, burns in air to form compound A, in which the mass percentage of phosphorus is 43.64%, with the remainder oxygen. The mass spectrum of A yields a molar mass of 283.9 g-mol. Write the molecular formula of compound A. (b) Compound A reacts with water to form compound B, which turns litmus red and has a mass percentage composition of 3.087% 11 and 31.60%... 

An elemental analysis of epinephrine resulted in the following composition 59.0% carbon, 26.2% oxygen, 7.15% hydrogen, and 7.65% nitrogen by mass. When 0.64 g of epinephrine was dissolved in 36.0 g of benzene, the freezing point decreased by 0.50°C. (a) Determine the empirical formula of epinephrine, (b) What is the molar mass of epinephrine ... 

Analysis of ibuprofen, the active ingredient in several over-the-counter pain relievers, shows that it contains 75.7% carbon, 8.8% hydrogen, and 15.5% oxygen. The mass spectrum of ibuprofen shows that its molar mass is less than 210 g/mol. Determine the chemical formula of this compound. 

A petroleum chemist isolated a component of gasoline and found its molar mass to be 114 g/mol. When a 1.55-g sample of this compound was burned in excess oxygen, 2.21 g of H2 O and 4.80 g of CO2 were produced. Find the empirical and molecular formulas of the compound. 

Butyric acid, a component of rancid butter, has a vile stench. Burning 0.440 g of butyric acid in excess oxygen yields 0.882 g of CO2 and 0.360 g of H2 O as the only products. The molar mass of butyric acid is 88 g/mol. What are its empirical formula and molecular formula ... 

The question asks for the mass of oxygen. We can use the ideal gas equation to calculate the number of moles of oxygen, and then molar mass leads us from moles to grams. 

Figure 10 Comparison of DSC record (solid line) in nitrogen and non-isothermal chemiluminescence run (dotted line) in oxygen for low molar mass diamide, the subject of figure 9. 

Figure 14 Chemiluminescence oxidation runs at 120°C in oxygen for polypropylene powder samples of different molar mass. The numbers against each curve express the average molar mass in g/mol. 

Figure 24 Comparison of isothermal chemiluminescence intensity for pullulan (1) and pullulan impregnated by methoxy magnesium methyl carbonate (2) from a 5% solution in methanol initial molar mass of pullulan 404 kg/mol, oxygen atmosphere, temperature 190°C.

Figure 25 Comparison of the molar mass distribution from original sample of pullulan (1) and that heated by the rate 2.5°C/min from 40°C to 220°C (2) in oxygen directly in chemiluminescence instrument. The line 3 is the same experiment with sample impregnated with MMMC.

As the molar masses of oxygen, nitrogen and argon are so similar, we can approximate the mole fractions of the gases to their percentage compositions. 

Suppose you also wanted to know how many grams of oxygen it would take to react with the 19.9 mol of iron. All you would need to do would be to change the stoichiometric ratio and the molar mass ... 

If the atomic weight of carbon is 12 amu/atom, and the atomic weight of oxygen is 16 amu/atom, what is the molar mass of carbon monoxide, CO ... 

Carbon dioxide gas (C02) has a molar mass of 44 g/mol. The two major components of air, which are oxygen and nitrogen, have molar masses of 32 g/mol and 28 g/mol, respectively. Calculate the room-temperature densities in g/L of nitrogen (N2), oxygen (02), and carbon dioxide (C02) gases. 

Calculate the molar masses of potassium chlorate and oxygen. Use the molar mass of potassium chlorate to find the number of moles in the sample. 

Molar mass mass of dry rhyolite per mole of oxygen... 

Hydrogen, H2. The question states that the ratio of the rates is 4.0. Oxygen gas is a diatomic element, so it s written as O2 and has a molar mass of 32.00 g/mol. Substitute these known values into Graham s law to determine the molar mass of the unknown gas. The problem states that the unknown gas effuses at a rate 4.0 times faster than oxygen, so put the unknown gas over oxygen for the ratio. (In short, the unknown gas is A, and the oxygen is B). 

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