Dinitrogen pentoxide is a product of the reaction between $\mathrm{P}_4 \mathrm{O}_{10}$ and $\mathrm{HNO}_3$. Write a balanced equation for this reaction. Calculate the theoretical yield of $\mathrm{N}_2 \mathrm{O}_5$ if $79.4 \mathrm{~g}$ of $\mathrm{P}_4 \mathrm{O}_{10}$ is combined with an excess of $\mathrm{HNO}_3$. (Hint: One of the products is $\mathrm{HPO}_3$.)

Magnesium oxide can be made by heating magnesium metal in the presence of oxygen. The balanced equation for the reaction is: $2 \mathrm{Mg}(s)+\mathrm{O}_{2}(g) \longrightarrow 2 \mathrm{MgO}(s)$ When 10.1 g of Mg reacts with 10.5 g $O_2$, 11.9 g MgO is collected. Determine the limiting reactant , theoretical yield, and percent yield for the reaction.

Using what you have reamed about emotions in the chapter respond to the following statement; Men feel fewer emotions than women.

Hoover Dam (is the highest arch-gravity type of dam in the United States. A plan view and cross section of the dam are shown in Fig. The walls of the canyon in which the dam is located are sloped, ream of the dam the vertical plane shown in Fig. is imately represents the cross section of the wate Use this vertical cross section to estime zontal force of the water on the dam. force acts.

In an experiment designed to produce calcium oxide by the chemical reaction

$$\text{2Ca} + \text{O}_2 \rightarrow 2\text{CaO}$$

177.2 g of CaO was obtained out of a possible 203.9 g of CaO.

a. What is the theoretical yield of CaO?

b. What is the actual yield of CaO?

c. What is the percent yield of CaO?

Calculate the heat capacity, in joules and in calories per degree, of the following: (a) 28.4 g of water (b) 1.00 oz of lead.

For the flat tension bar with stepped cross section shown in Fig. , the hole is centered in the wide portion of the bar and the fillets are quarter circles. Let $D=$ 4 in., $d=2.5$ in., and $t=0.5$ in. for this bar, and let the maximum axial load be $P=10$ kips. What is the maximum hole radius and what is the minimum fillet radius that may be accommodated if the maximum normal stress in the bar is not to exceed $\sigma_{\max }=18 \mathrm{ksi}$ ? Select radii that are multiples of $0.05 \mathrm{in}$.

$\text{\red{Compare and Contrast}}$ List the three major types of neurons and compare their roles.

A chemist adds $3.00 \mathrm{~g}$ of zinc to a solution containing an excess of silver nitrate. Only $7.2 \mathrm{~g}$ of silver metal is collected by the end of the investigation.

(a) Write a balanced chemical equation for the reaction.

(b) Determine the theoretical yield of silver metal.

(c) Determine the percentage yield of this reaction.

A $10$-ream case of printer paper sells for $\$39.99$ and has a $47\%$ markup based on the selling price. Find the markup and cost of one case of paper.

Does a liter of molten lead have the same volume as a liter of apple juice? Does it have the same mass?

Are either the first or second reflections diffuse reflections? Explain.

Regarding increasing productivity, factor mobility is:

A. Important in that it helps to fix a stable labor-intensive production process.

B. Not important in either a state or dynamic economy.

C. Important in that it helps to reallocate resources in a dynamic economy.

D. Important in that it helps to fix a stable capital-intensive production process.

A ream of copier paper weighs $2.25 \mathrm{~kg}$. How much does a sheet of copier paper weigh?