A chemist dissolves 156. mg of pure hydrobromic acid in enough water to make up 220. mL of solution.

Calculate the pH of the solution.

Be sure your answer has the correct number of significant digits.

The pH of the solution is 2.06

Explanation:

Step 1: Data given

Mass of hydrobromic acid (HBr) = 156 mg = 0.156 grams

Molar mass HBr = 80.91 g/mol

Volume of the solution = 220 mL = 0.220 L

Step 2: Calculate moles HBr

Moles HBr = mass HBr / molar mass HBr

Moles HBr = 0.156 grams / 80.91 g/mol

Moles HBr = 0.00193 moles

Step 3: Calculate moles H+

For 1 mol HBr we have 1 mol H+

For 0.00193 moles HBr we have 0.00193 moles H+

Step 4: Calculatemolarity of H+

Molarity H+ = moles H+ / volume

Molarity H+ = 0.00193 moles / 0.220 L

Molarity H+ = 0.00877 M

Step 5: Calculate the pH

pH = -log[H+]

pH = -log (0.00877)

pH = 2.06

The pH of the solution is 2.06

answer is: nuclear fusion produces elements that are heavier than helium.

nuclei combine to form a heavier nucleus, releasing energy.  

for example, fusion of hydrogen atoms at the sun.  

this fusion nuclear reaction is in the inner core of the sun and hydrogen (atomic number 1) is conveted into helium (atomic number 2).  

the inner core is the central region of the sun and all solar energy is produced in the core by nuclear fusion.