A 1.5 M solution of NaOH was made in a laboratory. If the solution made had a volume of 4.5 L, how many grams of NaOH were added?

270g

Explanation:

Given parameters:

Concentration of solution = 1.5M

Volume of solution  = 4.5L

Unknown:

Mass of NaOH added  = ?

Solution:

Concentration is the number of moles of solute found in a solution.

 To solve this problem, we need to find the number of moles of NaOH first;

 Number of moles  = concentration x volume

 Number of moles  = 1.5 x 4.5  = 6.75moles

 Now, to find the mass of NaOH;

  Mass of NaOH = number of moles x molar mass

       Molar mass of NaOH  = 23 + 16 + 1  = 40g

 Mass of NaOH  = 6.75 x 40  = 270g

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.