What mass (g) of barium chloride is contained in 50.0 mL of a barium chloride solution that has a chloride ion concentration of 0.390 M

4.06 g BaCl₂

Explanation:

Molarity (M) is given by this formula:

We are given M and L in this equation; we can solve for moles of BaCl₂ and use stoichiometry to convert this amount to grams.

First convert 50.0 mL to L:

Plug this value for L and 0.390 for M into the equation.

Solve for mol by multiplying .05 to both sides.

We have .0195 mol BaCl₂. Now let's use stoichiometry to calculate the amount of grams in .0195 mol BaCl₂.

The molar mass of BaCl₂ is 208.23 g so by using stoichiometry...

There are 4.06 g of BaCl₂ in this solution.

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

it takes on an electronical energy