Question

определите число молекул,содержащихся в порции: а)1.5 моль водорода б)азота массой 56 грамм в)в кислороде объемом 44,8 л?ПОМОГИТЕ:*

Answer 1

a)N=n*NA=1.5*6.02*10^23=9.03*10^23 молекул

б)n=m/M=56/28=2моль

N=n*NA=2*6.02 *10^23=12.04*10^23молекул

в)n=V/Vm=44,8/22,4=2моль

N=n*NA=2*6,02*10^23=12,04*10^23

Answer 2

Calculating the Number of Molecules

a) 1.5 moles of hydrogen:

To calculate the number of molecules in 1.5 moles of hydrogen, we can use Avogadro's number, which is approximately 6.022 x 10^23 molecules per mole.

The number of molecules can be calculated using the formula: Number of molecules = Number of moles * Avogadro's number

Number of molecules of hydrogen = 1.5 moles * 6.022 x 10^23 molecules/mole

Number of molecules of hydrogen = 9.033 x 10^23 molecules

Answer: The number of molecules in 1.5 moles of hydrogen is approximately 9.033 x 10^23 molecules. b) Nitrogen with a mass of 56 grams:

To find the number of moles of nitrogen, we can use the molar mass of nitrogen, which is approximately 14.01 grams/mole.

Number of moles of nitrogen = Mass of nitrogen / Molar mass of nitrogen Number of moles of nitrogen = 56 grams / 14.01 grams/mole Number of moles of nitrogen ≈ 3.99 moles

Using Avogadro's number, we can calculate the number of molecules: Number of molecules of nitrogen = Number of moles * Avogadro's number Number of molecules of nitrogen ≈ 3.99 moles * 6.022 x 10^23 molecules/mole Number of molecules of nitrogen ≈ 2.40 x 10^24 molecules

Answer: The number of molecules in 56 grams of nitrogen is approximately 2.40 x 10^24 molecules. c) Oxygen with a volume of 44.8 liters:

To calculate the number of moles of oxygen, we can use the ideal gas law, which states that 1 mole of any gas at standard temperature and pressure (STP) occupies 22.4 liters.

Number of moles of oxygen = Volume of oxygen / 22.4 liters/mole Number of moles of oxygen = 44.8 liters / 22.4 liters/mole Number of moles of oxygen = 2 moles

Using Avogadro's number, we can calculate the number of molecules: Number of molecules of oxygen = Number of moles * Avogadro's number Number of molecules of oxygen = 2 moles * 6.022 x 10^23 molecules/mole Number of molecules of oxygen = 1.204 x 10^24 molecules

Answer: The number of molecules in 44.8 liters of oxygen is approximately 1.204 x 10^24 molecules.