Calculate the mass of sodium hydroxide in 5.00 dm3 of a 0...
Calculate the mass of sodium hydroxide in 5.00 dm3 of a 0.125 mol dm-3 solution [NaOH = 40 g mol]
0.0156 g
0.625 g
1.00 g
25.0 g
Correct answer is D
1 mole of NaOH per dm3 has a mass of 40g mass of NaOH in 0.125 mole = 0.125 x 40 = 5g mass in 5.00 dm3 of the solution = 5 x 5 = 25.0g
The electronic configuration of an element is 1s2 2s2 2p6 3s2 3p3. Where is...
The bleaching action of chlorine gas is effective due to the presence of ...
If an element has the electronic configuration 1s 2 2s2 2p3 3s2 3p4, it is...
The following are properties of transition metals except ...
Which of the following statements about atoms of a metal is correct? They ...
What is the atomic number of Praseodymium? ...
The isotopes of neon are represented by the symbols 20x Ne, 21 y Ne, and...
When ethene gas reacts with chlorine gas to form 1, 2-dichloroethene, the reaction is called? ...