A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the element's identity?

Suppose you wanted to make 100 grams of water. what is the molar mass of water (h2o)?

Draw the lewis structure for the trisulfur s3 molecule. be sure to include all resonance structures that satisfy the octet rule.

Harry lives in a city, and he has a lung condition known as asthma. on certain days, harry has to stay inside because pollutants in the air make it difficult for him to breathe. which of these pollution sources are nonpoint sources that might bother harry if he goes outside? choose the two that apply.