If 6 molea of Au2S3 react with excess H2 , how many grams of H2S are formed ? ​

The chart shows the bid provided by four contractors to complete a job. which contractor is the most cost-effective?

Which scientists contributed to the determination of how cfcs in clouds in the upper atmosphere could destroy ozone molecules

Ablock of aluminum is dropped into a graduated cylinder with an initial volume of water at 75ml and the volumes rises to 90ml. if the block has a mass of 40.5 g what is its density ?