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Iso-electronic species is:
(1) F-,O-2
(2) F-, O
(3) F-, O +
(4) F-, O+2
Ans: F-,O-2
some examples of RELATIVE MOLECULAR MASS OF SOLUTES BY RELATIVE LOWERING OF VAPOR PRESSURE
1. Express 95 mg/l of Ca 2+ as milligrams per liter of CaCO 3 . 2. Express 221 mg/l of Ca(HCO 3 ) 2 as equivalents per liter of CaCO 3 . 3. Determine the concentration o
Which of the following atoms and ions are isoelectronic i.e. have the same number of electrons with the neon atom: (1) F - (2) Oxygen atom (
basic structure
(i) Use valence shell electron pair repulsion theory (VSEPR) to predict the shape of the molecule comprising oxygen, nitrogen and fluorine atoms, which has the formula ONF, and whe
How many moles of gas occupy 98 L at a pressure of 2.8 atmospheres and a temperature of 292 K?
Cast iron is iron or a ferrous alloy which has been heated until it liquefies, and is then poured into a mould to solidify. It is usually made from pig iron. The alloy constituents
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What is meant by ''mass number''
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