Predict what you would observe if you added platinium to dilute hydrochloric acid d-predict what you would observe if you left a piece of gold in a beaker of water for a week? give a reason for your
prediction
Help please!!

Urea, co(nh2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. what is the maximum mass of urea that can be manufactured from the co2 produced by combustion of 1.00 x 104 grams of co2?

Calcium chloride +gold(1) oxide—>

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?