The oxygen in a tank in the hospital respiratory unit has a pressure of 7220 mmHg. What is the pressure in atm? a. 5.49 atm
b. 10.16 atm
c. 2.90 atm
d. 9.50 atm

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

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.