A hydrated compound contains 25.9% calcium, 20.8% sulphur,41.6% oxygen, and the rest is water of crystallization. Determine the empirical formula​

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

What atom has the largest atomic radius

In november 1987, a massive iceberg broke loose from the antartic ice mass and floated free in the ocean. the chunk of ice was estimated to be 98 mi long, 25 mi wide, and 750 ft thick. a typical backyard swimming pool contains about 24,000 gallons of water. how many of these pools could you fill from the water in this iceberg? (assume the iceberg is a rectangular solid of the above dimensions and consists of water only). express answer in scientific notation.