Does topaz chip or scratch easily?

Is the American bittern a herbivore carnivore or an omnivore? Why maxillipeds are fringed with hair-like structures called setae? Why cyclones more frequent in India? What is the free energy for C2O4-2? What contributes to detritus? Why KmnO4 is used as self indicator? What reagent is used in the cyanmethemoglobin method and what two chemicals does it contain? How do you write out the electron configurations of solutions? How many neutrons are in an atom of this isotope if the atomic number of yttrium is 39 and the atomic mass of the isotope is 89? What Unit of measure begins with letter P? What is 37'854'120 liters in milliliters? Why is daylight savings change not always on same date? Does 850cc equal 850ml? What is TRH's role in the endocrine system? How does iron react with air and water? What happens when an active cold front overtakes a warm? Enumerate the changes that takes place inside the matter during the change of states? How many miles equal 1500 feet? Why does a light wave travel more slowly through gas than through a vacuum? How can I ensure proper ventilation and fresh air in my house during the winter months?