How many grams of potassium bromide, KBr, are in 100mL of a 0.50 M solution?

5.95g

Explanation:

1 = 1000 mL

∴ 100 mL = 100 ÷ 1000 = 0.1

Volume = 0.1

Concentration = 0.5 M

Concentration =

0.5 =

No. of moles = 0.5 x 0.1 = 0.05 moles

No. of moles =

Mass in 1 mole of KBr = 39 + 80 = 119g (39 is the mass of potassium and 80 is the mass of bromine)

0.05 =

x = 119 × 0.05 = 5.95g

b..

is the correct one

explanation:

covalent bonds form as valence electrons are shared between two atoms. lewis structures and structural formulas are common ways of showing the covalent bonding in organic molecules. formal charge describes the changes in the number of valence electrons as an atom becomes bonded into a molecule.

a is the answer to this question

explanation: