323.5g - 301.2g = 22.3g is the change in mass.
Answer:
Amount of sodium sulphate is 5.64g
Amount of water is 1.017g
Explanation:
First give a balanced equation for the reaction
2NaOH + H2SO4 > Na2SO4 + 2H2O
Find the number of moles of each reacting specie by dividing the mass by their molar mass
Use the number of moles to find the amount in the product
For 2NaOH
2.26/80=0.02825moles
0.02825 x molar mass of 2H2O = 1.017g
For H2SO4
4.19/98=0.0428moles
0.0428 x 132 = 5.64g
Percentage
by mass is the amount in mass of a component in a mixture per 100 unit of mass of the total
mixture. Percentage by mass is the same as %w/w. In order to determine this value, we need to know the mass of the substance in question and the total mass of the sample. In this case, we have to know the mass of Fe by doing certain calculations. Then, we divide this value by the total mass given of the ore, 4.05 g and multiply by 100%. It should be expressed as follows:
Percent by mass = mass of Fe in ore / 4.05 g ore sample x 100
However, the question is lacking some information so we cannot really specify the answer.
Answer:
Carbon is a chemical element, like hydrogen, oxygen, lead or any of the others in the periodic table. Carbon is a very abundant element. It exists in pure or nearly pure forms – such as diamonds and graphite – but can also combine with other elements to form molecules.