Answer:
26.5 g
Explanation:
First we convert 100.0 mL to L:
- 100.0 mL / 1000 = 0.100 L
Now we <u>calculate how many moles of sodium carbonate are needed</u>, using the <em>definition of molarity</em>:
- Molarity = moles / liters
- moles = molarity * liters
- 2.5 M * 0.100 L = 0.25 mol
Finally we <u>convert 0.25 moles of sodium carbonate into grams</u>, using its <em>molar mass</em>:
- 0.25 mol * 106 g/mol = 26.5 g
Answer:
Process B : constant pressure condition
Process A : constant volume condition
Explanation:
In case of constant pressure, some of the energy is used to do work on the surrounding to keep pressure constant. Due to this, the total heat energy is less than in case of constant volume. In Case of constant Volume all of heat is available, produced in reaction because no work is done.
If we look at our data,we will find that process B has energy 23.3 KJ which is less than process A, the energy of which is 25.9 KJ. It means Process B is occurred at constant pressure condition and Process A has occurred at constant volume condition
<u>Answer:</u> The amount of hydrogen gas produced in the reaction is 1.04 moles
<u>Explanation:</u>
We are given:
Moles of Mg = 2.08 moles
Moles of HCl = 2.08 moles
The chemical equation for the reaction of magnesium and HCl follows:
By Stoichiometry of the reaction:
2 moles of HCl reacts with 1 mole of magnesium metal.
So, 2.08 moles of HCl will react with = of magnesium metal.
As, given amount of magnesium metal is more than the required amount. So, it is considered as an excess reagent.
Thus, HCl is considered as a limiting reagent because it limits the formation of product.
By Stoichiometry of the reaction:
2 moles of HCl produces 1 mole of hydrogen gas
So, 2.08 moles of HCl will produce = of hydrogen gas
Hence, the amount of hydrogen gas produced in the reaction is 1.04 moles
Water is an example of a compound. It is a compound because it is made up of two hydrogen atoms and one oxygen atom hence its formula H2O.
Given :
An ideal gas contained in a cylinder with the volume 34.4L, temperature 667K and pressure 2 atm.
To Find :
What will be pressure of the gas if it is heated at 1000k and the volume becomes 50L.
Solution :
We know, by ideal gas equation :
Now, in the given question only their are two state and also their is no leakage so amount of gas is also constant.
So,
Therefore, the pressure of gas is 2.06 atm.