Hi, I have done my graduation in Engineering and worked in corporate for a few years. For last 3 years, I am giving tuition classes for Chemistry, the subject I always loved.
Explain why the concentration of CFCs increased in the atmosphere.
Create a table that describes the three common states of matter in terms of their shape, volume, and compressibility.
Classify each of the following as a physical or a chemical property.
a. Iron and oxygen form rust.b. Iron is more dense than aluminum.c. Magnesium burns brightly when ignited.d. Oil and water do not mix.e. Mercury melts at $-39^{\circ} C$
Organize Create a chart that compares physical and chemical properties. Give two examples for each type of property.
A Classify each example as a physical change or a chemical change.
a. crushing an aluminum canb. recycling used aluminum cans to make new aluminum cansc. aluminum combining with oxygen to form aluminum oxide
Calculate Solve each of the following.
a. In the complete reaction of 22.99 g of sodium with 35.45 $\mathrm{g}$ of chlorine, what mass of sodium chloride is formed?b. A 12.2 -g sample of $X$ reacts with a sample of $Y$ to form 78.9 $\mathrm{g}$ of $X$ . What is the mass of $Y$ that reacted?
CPVC is degraded by both strong acids and strong bases at elevated temperatures; acids corrode process units unless very expensive corrosion-resistant construction materials are used; and aqueous slurries with high solids content are difficult to pump. Use these facts to explain why the wetcake from the centrifuge is not sent directly to the dryer instead of going through the resin neutralizer, why sodium bicarbonate is used to achieve the neutralization, and why additional water is fed to the neutralizer.
