Which of the following elements has seven valence electrons?

N

Cl

Fr

Ar

What is the molarity of a 2.0 L sodium hydroxide solution containing 10.0 grams of solute

What type of mutation results when a nucleotide is dropped from a dna sequence?

Which element shares the most characteristics with neon (Ne) ?

How many carbon atoms are contained in 84.3 g of ethyne (c2h2) ?

A solution has a pH of 2.5. What is its [OH-]? 3.2 x 10-3 3.2 x 10-12 3.2 x 10-2 11.5

1. What is an isomer? How many possible isomers of hexane are there? What are the structural differences between these isomers?

An ion of oxygen contains eight protons and has a charge of 2-. What must occur for this ion to become a neutral oxygen atom? Group of answer choices It must lose two electrons. It must gain two protons. It must gain two electrons.

If 46.1 g of copper at 11.6 °C is placed in 85.0 g of water at 72.4 °C, what is the final temperature of the mixture? The specific heat capacities of copper and water are 0.385 J/g. K and 4.184 J/g. K, respectively, a. 71.2 °C b. 51.0 °C C 69.5 °C d.

how many grams of water are produced when 15 grams of magnesium hydroxide are reacted with sulfuric acid

Which would have the lowest input force? A short lever with a large fulcrum A long lever with the fulcrum as far as possible from the load A Short lever with the fulcrum as close as possible to the load A long lever with the fulcrum as close as