When $25.0 \mathrm{~mL}$ of $0.500 \mathrm{M}$ iron(II) sulfate is combined with $35.0 \mathrm{~mL}$ of $0.332 \mathrm{M}$ barium hydroxide, two different precipitates are formed. (a) Write a net ionic equation for the reaction that takes place. (b) Estimate the mass of the precipitates formed. (c) What are the equilibrium concentrations of the ions in solution?

Identify and explain the significance:

Triple Alliance

Triple Entente

Balkan "powder keg"

Francis Ferdinand

Darius is building a square launch pad for a rocket project. If the area of the launch pad is 121 square centimeters, what is its side length? Use the area formula, A = s$^{2}$, and show your work.

Using the discussion earlier, answer the questions below:

(a) Whom does she address at the end of the poem?

(b) What is the meaning of Matlock's message to those she addresses?

Verify the identity by transforming the lefthand side into the right-hand side.

$$\left(1-\sin ^2 \theta\right)\left(1+\tan ^2 \theta\right) = 1$$

Use the context of the sentences and what you know about the Latin root -stru- to explain your answer to each question.

If someone obstructs a doorway, is he or she allowing you to pass through it?

Two cars are headed south on the highway at different speeds. Starting when the faster car pulls alongside the slower car, one of the cars accelerates northward for 5.0 s and the other accelerates southward for 5.0 s. At the end of that 5.0-s interval, the two cars have the same speed. Which car is now ahead?

You can use the physical properties of matter to separate a mixture. Describe which physical property you would use and how you would take advantage of it to separate the following mixtures: a. a mixture of fine sawdust and iron shavings b. a mixture of gold and sand c. a mixture of cooking oil and sand

Find the equation of the surface.

A cylinder of radius $\sqrt{7}$ with its axis along the $y$-axis.

An awning is used to shade a window of height 2 m. It projects a distance d from the wall such that it completely shades the window when the Sun is at its maximum angle of elevation on the summer solstice. a) Show that the value of d is given by the relation d = 2 cot x. b) If $x=\frac{\pi}{3}$, how far must the awning project from the wall? c) Sketch a graph of d = 2 cot x on the interval $x \in\left[0, \frac{\pi}{2}\right]$. d) Interpret the meaning of the graph as x approaches 0 and as x approaches $\frac{\pi}{2}$.

For the given problem, determine the equations of the polynomials of degree two whose graphs pass through the given points.

$$(-1,-1),(0,1),(1,-3)$$

Determine the value of $y$ when $x=3.$

Iron oxide ores, commonly a mixture of $\mathrm{FeO}$ and $\mathrm{Fe}_2 \mathrm{O}_3$, are given the general formula $\mathrm{Fe}_3 \mathrm{O}_4$. They yield elemental iron when heated to a very high temperature with either carbon monoxide or elemental hydrogen. Balance the following equations for these processes.

$$\begin{aligned} &\mathrm{Fe}_3 \mathrm{O}_4(s)+\mathrm{H}_2(g) \rightarrow \mathrm{Fe}(s)+\mathrm{H}_2 \mathrm{O}(g) \\ &\mathrm{Fe}_3 \mathrm{O}_4(s)+\mathrm{CO}(g) \rightarrow \mathrm{Fe}(s)+\mathrm{CO}_2(g) \end{aligned}$$

Most of the given sentences contain an error in subject-verb agreement. Draw a line through the incorrect verb, and write above it the correct form. If a sentence is already correct, write C above the number.

$\lbrack15\rbrack$ Where's the shirts and pants for the dry cleaners?

Suppose the kick is attempted 36.0 m from the goalposts, whose crossbar is 3.00 m above the ground. If the football is directed correctly between the goalposts, will it pass over the bar and be a field goal? Show why or why not.