What is the number of moles in 0.025 g (NH4)2Cr2O7?

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

6what is the importance of water on earth? a) it keeps the top layer of the geosphere cool b) it allows life to exist c) it provides ice at the poles d) it creates earth's blue color from space

Awoman's basketball has a circumference between 28.5 and 29.0 inches and a maximum weight of 20 ounces (two significant figures). what are these specifications in units of centimeters and grams?