Sylvanite is a telluride mineral found in the Transylvania region of Romania. Sylvanite is 6.3% silver and 34.4% gold by mass. How many atoms of gold are present in a 250-kg sample of sylvanite?

Astudent made the lewis dot diagram of a compound shown. what is the error in the lewis dot diagram? a)an o atom should transfer all of its six electrons to mg because the formula is mgo b) both electrons of mg should be transferred to one o adam because the formula is mgo c) the electrons should be transferred from each o add him to capital mg because mg has fewer electrons d) the number of dots around mg should be four because it has to transfer two electrons to each o

Which of the following is true for the actual yield of a reaction? it is always calculated as a ratio. it is the yield from the excess reactant. it is the yield from the limiting reactant. it is always less than the theoretical yield.

How does the motion of particles in a gas change as the gas cools