Locate Petrograd, Ukraine, Siberia, Urals.

Alumina, ${Al}_2 {O}_3$, is amphoteric. Among examples of its amphoteric character are the reactions that take place when ${Al}_2 {O}_3$ is heated strongly or "fused" with acidic oxides and basic oxides.

(a) Give a balanced equation for the reaction of alumina with silica, an acidic oxide, to give aluminum metasilicate, ${Al}_2({SiO}_3)_3$.

(b) Give a balanced equation for the reaction of alumina with the basic oxide CaO to give calcium aluminate, ${Ca}({AlO}_2)_2$.

In Meditation $17$. Donne compares humanity to chapters in a book.The chapters ave been authored by God.

When 1.0 tablespoon of butter is burned or used by our body, it releases 418.4 kJ of energy. If we could use all the energy provided, how many tablespoons of butter would have to be burned to raise the temperature of 3.00 L of water from $18.0^{\circ} \mathrm{C}$ to $90.0^{\circ} \mathrm{C}$ ?

Which of the following releases spores into water?

A. Banana

B. Radish

C. Seaweed

D. Onion

E. Lemon

Using a chart like the one below, sequence the steps the Communists took to turn Russia into a centralized state dominated by a single party.

$$\begin{array}{|ll|} \hline \text { Steps to Communist control } \\ \hline 1 . \\ \hline 2 . \\ \hline \end{array}$$

A $56\mathrm{-kg}$ student runs at $6.0\mathrm{~m/s}$, grabs a hanging $10.0\text{-m-long}$ rope, and swings out over a lake (Fig. 8-49). He releases the rope when his velocity is zero. $(b)$ What is the tension in the rope just before he releases it?

Why do you think the father releases the heron and lies about what he did?

A $56\mathrm{-kg}$ student runs at $6.0\mathrm{~m/s}$, grabs a hanging $10.0\text{-m-long}$ rope, and swings out over a lake (Fig. 8-49). He releases the rope when his velocity is zero. $(a)$ What is the angle $\theta$ when he releases the rope?

Lolita throws a baseball into the air and the height h of the ball in feet at a given time t in seconds after she releases the ball is given by the function

$$h ( t ) = - 16 t ^ { 2 } + 30 t + 5$$

State the domain and range for this situation.

List the steps that the Communists took to turn Russia into a centralized state dominated by one party. Use a chart like the one given on the page.

How does Sir Launcelot repay the noblewoman who releases him from the four queens?

What happens to a liquid when it releases enough energy

A state has a population of 17 million people and an average ownership of 1.1 cars per person, each driven an average of 12,000mi/year, at an average fuel economy of 24mi/gal of gasoline (mpg). Officials estimate that an additional $60 million per year in revenue will be required to improve the state's highway system, and they have proposed an increase in the gasoline tax to meet this need. Determine the required tax in cents per gallon.