) The mass of potassium hydroxide (KOH) to be dissolved in (100 ml) of water to obtain a solution of 0.25M concentration is: a) 1.4g b) 4.5g c) 0.025g d) 5.6g .
) The mass of potassium hydroxide (KOH) to be dissolved in (100 ml) of water to obtain a solution of 0.25M concentration is: a) 1.4g b) 4.5g c) 0.025g d) 5.6g .
Chemistry
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ISBN:9781305957404
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Chapter1: Chemical Foundations
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
Transcribed Image Text:7 The mass of potassium hydroxride (KOH) to be dissolved in (100 ml) of water to
obtain a solution of 0.25Mconcentration is:
a) 1.4g
b) 4.5g
c) 0.025g
d) 5.6g .
8) Molarity (5g) of NaOH dissolved in 120 ml of solution the molar is:
a) 0.75M
b) 1. 04M
c) 1.25M
d) 0.5M.
9) How many grams of AICI) should be dissolved, to prepare 1 liter of a solution
in which the concentration of Ch
ions 0.6M?
a) 240.3 grams
b) 80.1 grams
c) 26.7
grams
d) 41.1 grams.
10) For the following reaction:
2A +3B -→ 2AB
Molecular weight AB, = 133.5 g mol
Atomic a Weights A= 27 & B= 35.5
The number of grams of AB. consisting of (12g) interaction of B:
a) 26.2g
b) 15.04g
c) 20g
d) 31.4g
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