How many grams of sodium chloride (NaCl, 58.44 g/mol) are needed to make up 250. mL of a solution that is 2.00 M?

In the chemical equation below, in the direction in which it is written, which is the oxidizing agent? Sn2+ + Br2 –> Sn4+ + 2Br-

For an ideal gas, considering the number of moles being constant, which one of the following graphs describing the relationship between pressure (P), volume (V), and temperature (T), is INCORRECT ?

What is the net ionic equation for the balanced reaction of aqueous ammonium chloride with aqueous lead (II) nitrate?                                    NH4Cl(aq) + Pb(NO3)2(aq) –>  ?

Use the dropdown boxes to balance the reactions below.  If a coefficient is one, normally we would leave it blank.  However, for the sake of testing it will be okay to choose “1” for balancing an equation.  Fe2O3 + H2SO4 –> Fe2(SO4)3 + H2O

NaOH forms a strong electrolyte in an aqueous solution.

Using formal charges, predict the most favored structure.

Indicate the gas with the lowest density at STP.

How many hydrogen atoms are there in a 346 g sample of pure ammonia (NH3, 17.0 g/mol)?

A chemical formula in which the subscripts represent the simplest whole-number ratio of the atoms or ions in a compound.