Question

Сколько молли составляет 120гр меди 54 серебра в три гр углерода 4гр кисслорода 100гр водорода? помогите с задачей

Answer 1

Тут все просто, n - количество вещества ищем по n=m/M, в таблице Менделеева смотрим M ну и таким образом вычисляем n, хочу обратить внимание O2, H2 кислород и водород соответственно для них M будет 16+16 и 1+1, я бы расчитал но учебника нету с собою ну или простой таблицы 

Answer 2

Calculating the Molar Amounts

To calculate the molar amounts of the given elements, we can use their molar masses and the given masses.

- Molar mass of copper (Cu) = 63.55 g/mol - Molar mass of silver (Ag) = 107.87 g/mol - Molar mass of carbon (C) = 12.01 g/mol - Molar mass of oxygen (O) = 16.00 g/mol - Molar mass of hydrogen (H) = 1.01 g/mol

Now, let's calculate the molar amounts for each element.

1. Copper (Cu): - Given mass = 120 g - Molar mass = 63.55 g/mol - Molar amount = Given mass / Molar mass - Molar amount of copper = 120 g / 63.55 g/mol = 1.886 moles

2. Silver (Ag): - Given mass = 54 g - Molar mass = 107.87 g/mol - Molar amount = Given mass / Molar mass - Molar amount of silver = 54 g / 107.87 g/mol = 0.500 moles

3. Carbon (C): - Given mass = 3 g - Molar mass = 12.01 g/mol - Molar amount = Given mass / Molar mass - Molar amount of carbon = 3 g / 12.01 g/mol = 0.250 moles

4. Oxygen (O): - Given mass = 4 g - Molar mass = 16.00 g/mol - Molar amount = Given mass / Molar mass - Molar amount of oxygen = 4 g / 16.00 g/mol = 0.250 moles

5. Hydrogen (H): - Given mass = 100 g - Molar mass = 1.01 g/mol - Molar amount = Given mass / Molar mass - Molar amount of hydrogen = 100 g / 1.01 g/mol = 99.01 moles

Summing Up the Molar Amounts

Now, let's sum up the molar amounts of all the elements to find the total molar amount.

Total molar amount = Molar amount of copper + Molar amount of silver + Molar amount of carbon + Molar amount of oxygen + Molar amount of hydrogen Total molar amount = 1.886 moles + 0.500 moles + 0.250 moles + 0.250 moles + 99.01 moles Total molar amount = 101.887 moles

So, the total molar amount of the given elements is approximately 101.887 moles.