A1.2 kg sample of th-228 has a half-life of 1.9 years. how many grams of th is left after 13.3 years?

what is your question? collegechemistry 5+3 pts 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.

Give one example of a pure (exact) number and of an estimated (measured) number.

How do you interpret a chromagram for what mixtures contain?