18 gm glucose is dissolved in 90 gm of water. The relative lowering of vapour pressure is equal to​

Can someone me with 3 and 4 plz. this is for masteries test.

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.

Calculate the number of grams of sodium in 3.00 g of each sodium-containing food additive.