Which of the following atoms has seven valence electrons?

chlorine (Cl)

nitrogen (N)

manganese (Mn)

oxygen (O)

A 2.25L balloon filled with gas is warmed from 249.6K to 309 K. What is the volume of the gas after it is heated?

The molar mass of the compound was found to be 30.069 g/mol. what is the molecular formula? express your answer as a chemical formula.

A cubic piece of metal measures 6.00 cm on each edge. If the metal is nickel, whose density is 8.90 g/cm3, what is the mass of the cube?

If a large leak of refrigerant occurs such as from a filled cylinder in an enclosed area what action should be taken when no self-contained breathing apparatus is available?

Because hydroxide ions are alkaline, they influence the alkalinity of water Would this be true or false?

Describe a chemical formula give an example

Consider the reaction between barium chloride and sodium sulphate. If 25.0 mL of 0.75 M barium chloride react, how many grams of solid are produced?

Which of the following is the correct definition of nuclear energy? energy produced from the splitting of atoms energy an object has because of its motion or position energy stored in chemical bonds of molecules energy resulting from the flow of

Ethyl acetate reacts with H2, in the presence of a catalyst to yield ethyl alcohol: C4H8O2 + 2H2--> 2C2H6O. A. How many grams of ethyl alcohol are produced by reaction of 2.7 mol of ethyl acetate with H2? B.

Why is it incorrect to balance a chemical equation by changing the subscripts?