1. a sample of gold (au) has a mass of 35.12 g.

a. calculate the number of moles of gold (au) in the sample and record in
table 1. show your work.

b. calculate the number of atoms of gold (au) in the sample and record
in table 1. show your work.

show your work this is chemistry!

Sylvanite is a mineral that contains 28.0% gold by mass. how much sylvanite would you need to dig up to obtain 77.0 g of gold? explain how you got your answer and the steps you took. you

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

The human eye contains a molecule called 11-cis-retinal that changes shape when struck with light of sufficient energy. the change in shape triggers a series of events that results in an electrical signal being sent to the brain that results in vision. the minimum energy required to change the conformation of 11-cis-retinal within the eye is about 164 kj/mol.