At STP, an element that is a brittle solid and a poor conductor of heat and electricity could have an atomic number of

(1) 12 (3) 16

(2) 13 (4) 17

The first mechanistic step in the direct reaction of an amine with a carboxylic acid to produce an amide is:

The environment plays a crucial role in an organism's ability to fossilize. Which is the best location for fossilization?

Is the autoionization of water endothermic or exothermic?

All synthetic materials ultimately come from

What are compounds that are formed when two or more atoms combine to form molecules are called

Methods used to reduce sulfur dioxide emissions from smokestacks are an attempt by humans to A lessen the amount of insecticides in the environment B eliminate diversity in wildlife C lessen the environmental impact of acid rain D use non chemical

What does 54 in mn-54 represent

Valerie wants to examine the properties of a thick liquid but is finding it difficult to pour the liquid into a beaker. She needs to finish her investigation before the end of class.

What is the chemical name of baking soda

Breaking bonds requires what type of energy flow?