Which substances are needed in the smallest amount by a human body?

Can anyone tell me 5 things that would happen if we didn't have helium?

The expected first intermediate formed during a halohydrin reaction is: a. a cyclic oxonium ion. b. the most stable carbocation with OH on the adjacent carbon. c. ahalonium ion. d. the most stable carbanion. e.

What is the name of this compound? CH3-CH2-CH2-CH2-O-C6H5 butylphenyl ether cyclohexylbutyl ether phenylbutyl ether butylcyclohexyl ether

Why is nitrogen gas very unreactive?

Suppose you place an ice cube into a cup of hot tea? What will happen to the temperature of the ice cube and the tea? A) The temperature of the ice will increase quickly, while the temperature of the tea will drop slowly.

Consider the positions of barium (Ba), sulfur (S), silicon (Si), and calcium (Ca) on the periodic table. The atoms of which element require the least amount of energy to give up an electron when forming chemical bonds?

what is way to find the numbers of liters in 8 kilometers? (A.) Add 5,000 and 3, because you are adding 3 kiloliters to 5,000 liters. (B.) Multiply 8 by 3,000, because each kiloliter has 3,000 liters. (C.

How much energy must be added to 2 mol H2O (g) to cause it to decompose into H2 and 02? KJ

How many moles are there in 270.4 g sample of NaOH

Suppose a 10.0 L reaction vessel is filled with 0.86 mol of BrOCl and 0.86 mol of BrCl. What can you say about the composition of the mixture in the vessel at equilibrium?