Which change to american life happened as a result of new technology in the late twentieth century? a. americans could cash their checks in person at the bank. b. americans could make phone calls from their homes. c. americans could purchase items from catalogs. d. americans could use a personal computer at home.

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

What is the approximate vapor pressure when the gas condenses at 70 degrees celsius

Which of these statements best explains why space exploration should be encouraged? it prepares humans to live without oxygen. it dispel myths about objects in space. it prevents comets and asteroids from striking earth. it creates technology to absorb harmful radiations in space.