The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

$\tt \%(m/v)\rightarrow 12\%=\dfrac{mass~CaCl_2}{volume~of~solution}\times 100\%\\\\mass~CaCl_2=12\%\times 6.1\div 100\%\\\\mass~CaCl_2=0.732~g$

5 0

3 years ago

Which of the following pairs of elements is most likely to form an ionic compound? a oxygen and fluorine b sodium and aluminum c

irina [24]

An ionic compound consists of a metal AND a non-metal.

Option A:

Oxygen and fluorine are non-metals.

Option B:

Sodium and aluminium are non-metals.

Option C:

Calcium is a metal and chlorine is a non-metal.

Option D:

Nitrogen and sulfur are non-metals.

Thus, the answer is C.

4 0

3 years ago

Why are elephants made up of many cells

Nookie1986 [14]

Answer: Cells from the smallest to the largest of mammals often seem to be “one size fits all.” Now a closer look reveals that whether a cell lives in an elephant, mouse or something in between can make a big difference in its life

Explanation:

3 0

3 years ago