Consider the following reaction:     In this reaction, Mg²⁺(aq) is:

A pool is treated with calcium hypochlorite pool shock. If Ca(OCl)₂ has 50.0% available chlorine by mass, what ppm chlorine increase will result from the addition of 2.00 kg of pool shock to a 40.0 x 10³ L swimming pool? (density of water = 1.00 kg/L)

All exams will use Honorlock this semester.

All exams will use Honorlock this semester.

Consider the balanced chemical equation:     If 46.8 g H₂ and 179.4 g N₂ are mixed to form NH₃, which of the following substances is the limiting reactant?

What is the concentration of lithium ions in 0.450 M Li₂SO₄?

What quantity in moles of CH₃OH are there in 150.0 mL of 0.210 M CH₃OH?

(Worth 13 points total) Let \(A = \begin{bmatrix} 1 & -1 & 2 \\ 1 & 0 & 2 \\ 0 & -2 & 4\end{bmatrix}\)    Part A) Find the inverse of \(A\) by row reducing \(\). You must write which row operation(s) you are using at each step.   Part B) Use your \(A^{-1}\) from Part (a) to solve the following system. Simplify your final answer. \(\begin{align*} x – y + 2z &= 1 \\ 2x – 3y + 4z &= -3 \\ 5z – 2y &= 2\end{align*}\)   Write your final answers in the text box below. Your written work will be submitted to Gradescope as soon as you submit on Canvas.

A chemist has a block of copper metal (density is 8.96 g/mL). They drop the metal into a graduated cylinder containing water, and find the volume change is 1.70 mL. What is the mass of the block, in grams? (Just put the number and no units.)

Which one of the following represents the molecular equation for the reaction of NH₃ with HI?