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During a flame test why is calcium''s flame not persistent, while that of strontium is?
Ans) Because it does not have many ions as compared to the Strontium. It is the ions which produce color.
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Explain the statement "Water has bent geometry" Water has bent geometry; that is, the H-O-H bond angle is approximately tetrahedral. Repulsion among the lone pairs and the bond
can all the total heat content available betotally converted to work done?
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According to Heisenberg's uncertainty principle, the product of uncertainties in position and velocities for an electron of mass 9.1x 10 -31 kg is: (1) 2.8x 10 -3 m 2 -s -1
HOW TO PREPARE PTLC
A student wishes to prepare 250ml of a 0.20mol/L solution of oxalic acid (COOH)2.2H2O. a) Calculate the amount (no.of moles) of oxalic acid required. b) Calculate the mass of oxali
HYDROGEN Hydrogen is the natural element in the Universe and is a major constituent of stars. It is relatively much less common on Earth but nevertheless forms nearly 1% by mass
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