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Calculate the volume of 0.5 mol dm-3 H2SO4 that is neutralized by 25 cm3 of 0.1 mol dm-3 NaOH
5.0 cm3
2.5 cm3
0.4 cm3
0.1 cm3
The acid that is used to remove rust is
boric
hydrochloric
trioxonitrate (V)
tetraoxosulphate (VI)
Carbon (II) oxide is considered dangerous if inhaled mainly because itcan cause injury to the nervous system
can cause injury to the nervous system
competes with oxygen in the blood
competes with carbon (IV) oxide in the blood
can cause lung cancer
Coffee stains can best be removed by
kerosene
carbon tetrachloride
a solution of borax in water
turpentine
Calculate the solubility (mol dm−3) of 40 g of CuSO4 dissolved in 100 g of water at 120 °C. [Cu = 64, S = 32, O = 16]
0.25
2.50
4.00
0.40
