The ions X- and Y+ are isoelectronic, each containing a total of 10 electrons. How…
The ions X– and Y+ are isoelectronic, each containing a total of 10 electrons. How many protons are…
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The electronic configuration of an elements is 1s22s22p63s23p3. How many unpaired electrons are there in…
The electronic configuration of an elements is 1s22s22p63s23p3. How many unpaired electrons are there in the element? A.…
Atoms of element X (with 2 electrons in the outer shell). combine with atoms of…
Atoms of element X (with 2 electrons in the outer shell). combine with atoms of Y (with 7…
A given quantity of a gas occupies a volume of 228 cm3 at a pressure…
A given quantity of a gas occupies a volume of 228 cm3 at a pressure of 750mm Hg.…
A sample of a gas exerts a pressure of 8.2 atm when confined in a…
A sample of a gas exerts a pressure of 8.2 atm when confined in a 2.93 dm3 container…
Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium…
Calculate the volume of carbon (IV)oxide measured at s.t.p, produced when 1 kg of potassium hydrogen trioxocarbonate (IV)…
30cm(^3) of oxygen at 10 atmospheres pressure is placed in a 20 cm(^3) container. Calculate…
30cm(^3) of oxygen at 10 atmospheres pressure is placed in a 20 cm(^3) container. Calculate the new pressure…
In two separate experiments, 0.36g and 0.71g of chlorine combined with a metal X to…
In two separate experiments, 0.36g and 0.71g of chlorine combined with a metal X to give Y and…
An iron ore is known to contain 70.0% Fe2O3. The obtain from 80kg of the…
An iron ore is known to contain 70.0% Fe2O3. The obtain from 80kg of the ore is? (Fe…
Which of the following are mixtures? i, Petroleum ii, Rubber latex iii. Vulcanizer’s solution iv,…
Which of the following are mixtures? i, Petroleum ii, Rubber latex iii. Vulcanizer’s solution iv, Carbon (II)sulphide A.…