What is the molar mass of helium (He)?

Wait until a while ring of solid ammonium chloride forms where the hydrogen chloride and ammonia gases meet. The ammonia gas, having a lower molecular weight ... The molar mass of ammonia (NH₃) is calculated by summing up the atomic mass of constituent atoms with respect to the number of atoms present in the molecule. Aug 6, 2015 ... The chemical formula of NH3 suggests that it contains 1 mole of N and 3 moles of H. · Therefore, the molar mass of NH3 = (1 x molar mass of N + ... May 13, 2010 ... However, the molar mass given for. SO3 is wrong. Question 14 was ... 20 What is the H-N-H angle in the NH3 molecule? Choose the closest ... N-NH3 (mg L-1). 398.02. 273.31. 544.04. 121.45. 5.0. 93.0. 8. 20.0. N-Org (mg L-1) ... value, implying homogeneity of the carbonaceous matter molar mass. The low ... Molar mass. (g mol-1). Boiling point (K). Density. (g mL-1). Research octane number. (RON). Water solubility. (g L-1). Pentane. 72.15. 309. 0.626. 622. 0.1. Ammonia ammonia; anhydrous ammonia. Gas. SAFETY DATA SHEET. GHS product ... Molecular weight. Flow time (ISO 2431). : Not available. Vapor pressure. Vapor ... ... molar NH3 mass flow-rate or doubled the quotient. 200 of the molar injected urea mass flow-rate and of the molar NOx mass flow-rate from the engine. The ... ... Calculations. Exhaust mass flow [g/s]:. (19). Stored NH3 [g]:. (20). Reduced NO [g]:. (21). NOx reduction efficiency [%]: (22). Molar mass ratio [nNH3/nNO]:. ( ... The present work considers the thermodynamic and transport properties of the real NH3/H2 gas mixture as a function of the state variables temperature, mass.