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When an equilibrium is established between dissolved and undissolved solutes, the solution is said to be?
Which of the following pairs of components have the same molecular mass?
[ H = 1.0, C = 12.0, O = 16.0 ]
Which of the substances is non-polar?
Calcium and magnesium belong to the group of the periodic table because both?
If 6.5g of magnesium ribbon reacts completely with Hydrochloric acid, how many grams of hydrogen gas would be liberated?
Mg(s) + 2 HCl(aq) --> MgCl 2(aq) + H 2(g)
[ H = 1.0, Mg = 24.0 ]
The bleaching action of chlorine is through the process?
which of the following elements has the highest ionization energy?
Which of the following metals reacts slowly with cold water?
A solid with higher melting and boiling points is likely to be?
The periodic table is an arrangement of elements according to their?
Which of the following factors will speed up the rate of evolution of carbon (iv) oxide in the reaction below?
2HCl + CaCO\(_3\) → CaCl\(_2\) + H\(_2\)O + CO\(_2\)
The part of the total energy of a system that accounts for the useful work done in a system is known as
When the end alkyl groups of ethyl ethanoate are interchanged, the compound formed is
An element Z contains 80% of \(^{16} _8\)Z and 20% of \(^{18} _8\)Z. Its relative atomic mass is
How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons?
A solution X, on mixing with AgNO\(_3\) solution gives a white precipitate soluble in aqueous NH\(_3\), a solution Y, when also added to X, also gives a white precipitate which is soluble when heated solutions X and Y respectively contain
The reaction \(2H_2 S + SO_2 \to 3S + 2H_2 O\) is
How many alkoxyalkanes can be obtained from the molecular formula C\(_4\)H\(_{10}\)O?
The cost of discharging 6.0g of a divalent metal, X from its salt is ₦12.00. What is the cost of discharging 9.0g of a trivalent metal, Y from its salt under the same condition?
[X = 63, Y = 27, 1F = 96,500C]
If the cost of electricity required to discharge 10g of an ion X\(^{3+}\) is N20.00, how much would it cost to discharge 6g of ion Y\(^{2+}\)?
[1 faraday = 96,500C, atomic masses are X = 27, Y = 24]