Calculate the atomic mass of silicon. The three silicon isotopes have atomic masses and relative abundances of 27.9769 amu (92.2297%), 28.9765 amu (4.6832%) and 29.9738 amu (3.0872%). Show your work.

What is the total number of moles of o2 produced from the complete decomposition of 8 moles h2o2

What do chloroplasts do

Example of vander waal force

You have seven closed containers, each with equal masses of chlorine gas (cl2). you add 10.0 g of sodium to the first sample, 20.0 g of sodium to the second sample, and so on (adding 70.0g of sodium to the seventh sample).

The peak is intensity for our sun on a black body curve would be in which of the following wavelength ranges? 0.01-10nm 10-380nm 560-600nm 1,000,000-100,000,000nm

True or False: It is recommended to use sugar cubes to sweeten lemonade because they have a low surface area.

54,000,000 nanometers equals 0.000000054 megameters.

When cream mixes with coffee, is this a chemical or physical change?

A gas occupies 72.1 at stp. At what temperature would the gas occupy 85.9 L at a pressure of 93.6 kPa?

An 80 kg volleyball player lands from a jump and tries to stop her forward motion. The normal contact force exerted by the floor on her shoes is 2000 N. The friction force exerted by the floor on her shoes is 600 N acting backward on the player.