What is the mass (g) of 0.25mols of NaCl?
What you need for these equations are a calculator, periodic table and the following equation:
Mass (g) = Mr x Moles (important equation to remember)
In this case we already know the moles as it's in the question, 0.25 moles.
to find the Mr, you need to look at your periodic table. Find the relative atomic mass of Na and Cl and add the two numbers together.
Na = 22.99
Cl = 35.45
NaCl = 58.4
Now just put all of the numbers into the equation.
0.25 x 58.4 = 14.6g
EB
Related Chemistry GCSE answers
All answers ▸Explain why the reactivity of the elements in group 1 increases as we go down the periodic table?
Describe how elements of the periodic table are arranged relating to their atomic structure. (6 marks)
What is the difference between an alkane and and alkene
Write a balanced equation for the reaction of calcium hydroxide with nitric acid.