Examples of molecular weight computations: C[14]O[16]2, S[34]O[16]2. If the sun were suddenly and instantly turned into a black hole, what would happen to the Earth? ... How many moles of element are there in 0.320 kg. The relative molecular mass of a gas or vapour is the ratio between the mass of one molecule of the gas or vapour to mass of one atom of hydrogen. Noncombustible and nontoxic. One molecule of nitrogen has a mass of approximately 4.65173 x 10-23 grams. Nitrogen appears as a colorless odorless gas. O 2 is a diatomic molecule. (1 u is equal to 1/12 the mass of one atom of carbon-12) so 80.1 g of NH4NO3 has 14 X 2 = 28 g of N (because there are 2 N atoms in NH4NO3) so 1 g of NH4NO3 will have 28/80.1 g of N . Get an answer for 'At sea level, a nitrogen molecule in the air has an average translational kinetic energy of 6.20 x 10^-21 J. Used in food processing, in purging air conditioning and refrigeration systems, and in pressurizing aircraft tires. Hydrogen molecule (H2 - Molecular mass), molar mass Type the number of Hydrogen molecule (H2) you want to convert in the text box, to see the results in the table. R = 2 x 6.67 x 10-11 N m 2 kg-3 x 1.99 x 10 30 kg / (3.0 x 10 8 m/s) 2 R = 2.95 x 10 3 m = 2.95 km. About Nitrogen gas; Nitrogen gas weighs 0.001251 gram per cubic centimeter or 1.251 kilogram per cubic meter, i.e. The mass of nitrogen in 1000 kg of urea [C O ... What is the molecular mass of substance, each molecule of which contains 4 atoms of carbon and 10 atoms of hydrogen. The average speed of a nitrogen molecule in air is about 6.70 102 m/s, and its mass is about 4.68 10-26 kg. View Answer. Makes up the major portion of the atmosphere, but will not support life by itself. molecular mass of NH4NO3 = 80.1 g/mole . The molecular mass of an element is defined as the sum of the masses of the elements present in the molecule. 3. Answer: Mass of one atom of an element = 6.645 × 10-23 g so 1 kg or 1000 g of NH4NO3 will have 28/80.1 X 1000 = 349.563 g of N MEDIUM. Molecular mass is obtained by multiplying the atomic mass of an element with the number of atoms in the molecule and then adding the masses of all the elements in the molecule. (a) If it takes 4.20 10-13 s for a - 13633495 Definitions of molecular mass, molecular weight, molar mass and molar weight. Molecular mass (molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). Its mass is 4.70 x 10^-26 kg. An organic compound contains 69% carbon, 4.8% hydrogen and the remaining is oxygen. 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