A gaseous binary compound has a vapor density that is 2.53 times that of nitrogen at 100°C and atmospheric pressure. When 8.21 g of the gas reacts with AlCl3 at 100°C, 1.62 g gaseous nitrogen is produced, removing all of the nitrogen originally present.(a) Estimate the molecular mass of the gaseous compound.(b) How many nitrogen atoms are there in a molecule ofthe compound?(c) What is the maximum possible value of the atomicmass of the second element?(d) Are other values possible for the atomic mass of thesecond element? Use a table of atomic masses to identify the element that best fits the data.(e) What is the molecular formula of the compound?

Sand is mainly silicon dioxide. When sand is heated with an excess of coke (carbon),pure silicon and carbon monoxide are produced.(a) Write a balanced equation for the reaction.(b) How many moles of silicon dioxide are required to form 20.00 g of silicon?(c) How many grams of carbon monoxide are formed when 98.76 g of silicon areproduced?

Question 9 Кey O= C O= 0 A mixture of CO(g) and O2(g) is placed in a container, as shown above. A reaction occurs, forming CO>(g). Which of the following best represents the contents of the box after the reaction has proceeded as completely as possible?

1. Explain the term empirical formula and a molecular formula and state how they two differ. 2. Write the empirical formulas of the following: (a) H₂O₂= ; (b) C¿H= ; (c) C6H₁2O6 = ; (d) H₂0 = (e) MgO 12 NaOH g of O 3. Calculate the formula mass (a) NaCl = (b) KOH of Cu 9 = 4. What is the percentage of Ag in AgNO3 5. What is the percentage of C in C12H22O11 (Sucrose, Cane Sugar) 6. Determine in g the mass of 2.5 moles of = 7. How many moles in 0.5 g of Mg; and 0.2 of C₂H₂O₂. ; 8. Determine the number of atoms in 0.8 g 9. A substance was found by analysis to contain 45.57 % of Sn and 54.43 % of Cl. What is the empirical formula of the substance. 10. Ethylene Glycol has a molecular formula (a) Determine its molar mass (b) The percentage compositions of its component's elements (c) The empirical formula of Ethylene Glycol

Balance each chemical equation. (a) HI + NaOH Nal H2O --> (b) Ba(NO3)2 + H2S Bas HNO3 --> (C) CH4 O2 CO2 H20 --> (d) C4H10 O2 CO2 H2O --> CO2 Fe2O3 + CO (е) Fe -->

The diameter of a carbon atom is 1.54 A° . (a) Express thisdiameter in picometers. (b) How many carbon atoms could bealigned side by side across the width of a pencil line that is0.20 mm wide?

Phosgene, a substance used in poisonous gas warfare during World War I, is so named because it was first prepared by theaction of sunlight on a mixture of carbon monoxide and chlorine gases. Its name comes from the Greek words phos (light) andgenes (born of). Phosgene has the following elemental composition: 12.14% C, 16.17% O, and 71.69% Cl by mass. Its molarmass is 98.9 g>mol. (a) Determine the molecular formula of this compound. (b) Draw three Lewis structures for the moleculethat satisfy the octet rule for each atom. (The Cl and O atoms bond to C.) (c) Using formal charges, determine which Lewisstructure is the dominant one. (d) Using average bond enthalpies, estimate ΔH for the formation of gaseous phosgene fromCO(g) and Cl21g2.

Combustion analysis of a compound yielded 236.73 g CO2, 48.48 g H2O, 61.86 g NO2, and 86.15 g SO2. (a) What is the empirical formula of the compound? (Assume it contains no oxygen.) (b) If the molar mass of the compound is 196.30 g/mol, what is the molecular formula of the compound?

The molecular formula of allicin, the compound responsible for the characteristic smell of garlic, is CgH10OS2. (a) What is the molar mass of allicin? g/mol (b) How many moles of allicin are present in 4.60 mg of this substance? mol (c) How many molecules of allicin are in 4.60 mg of this substance? allicin molecules (d) How many O atoms are present in 4.60 mg of allicin? O atoms

Carborundum (silicon carbide), SiC, is a very hard material used as an abrasive on sandpaper and in other applications. It is prepared by the reaction of pure sand, SiO2, with carbon at high temperature. Carbon monoxide, CO, is the other product of this reaction. (a) Write the balanced equation for this reaction. (Omit states - of - matter from your answer. Use the lowest possible whole number coefficients.) chemPadHelp (b) Calculate how many kilograms of SiO2 are required to produce 3.14 kg of SIC.