Question

2Li + 2H2O = 2LiOH + H2 определить количество (число молей), объём и число молекул образовавшегося вещества водорода, если в реакцию вступило 3 молекулы воды.

Answer 1

3/6=0.5 моль
0.5/2=х/1
х=0.25
0.25*22.4=5.6
0.25*6=1.5
Ответ:
Число молей - 0.25
Объем - 5.6 
Кол-во молекул - 1.5 * 10^23

Answer 2

Calculation of the Amount, Volume, and Number of Molecules of Hydrogen Gas Produced

To determine the amount, volume, and number of molecules of hydrogen gas produced in the reaction 2Li + 2H2O → 2LiOH + H2, we need to consider the stoichiometry of the reaction and the given number of water molecules.

The balanced chemical equation shows that 2 moles of lithium (Li) react with 2 moles of water (H2O) to produce 2 moles of lithium hydroxide (LiOH) and 1 mole of hydrogen gas (H2).

From the given information that 3 molecules of water (H2O) are involved in the reaction, we can determine the following:

1. Amount of Hydrogen Gas: - Since 2 moles of water (H2O) produce 1 mole of hydrogen gas (H2), we can calculate the amount of hydrogen gas produced using the mole ratio. - In this case, since 3 molecules of water are involved, we divide by 2 to get the number of moles of hydrogen gas produced. - Therefore, the amount of hydrogen gas produced is 1.5 moles.

2. Volume of Hydrogen Gas: - To calculate the volume of hydrogen gas produced, we need to use the ideal gas law equation: PV = nRT. - However, we need additional information such as the temperature (T) and pressure (P) to calculate the volume. - Without the temperature and pressure values, we cannot determine the volume of hydrogen gas.

3. Number of Molecules of Hydrogen Gas: - To calculate the number of molecules of hydrogen gas produced, we can use Avogadro's number, which states that 1 mole of any substance contains 6.022 x 10^23 particles (atoms, molecules, etc.). - Since we know the amount of hydrogen gas produced is 1.5 moles, we can multiply this by Avogadro's number to find the number of molecules. - Therefore, the number of molecules of hydrogen gas produced is 9.033 x 10^23 molecules.

Please note that without the temperature and pressure values, we cannot determine the volume of hydrogen gas produced accurately.