What was the significance to india of the persian conquest of the indus valley and kashmir under emperor darius in the sixth century b. c.e.?

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.