Danielle

Given two bijections, if we compose them, what is the reason(s) that their composition is itself a bijection?

Which of the following statements is TRUE?

A) All silicates are composed of SiO4 tetrahedra that bond together through an oxygen to form single chains.

B) The flakiness of mica comes from its single silicate chain structure.

C) The fibrous nature of asbestos comes from its silicate sheet structure.

D) In some silicates, ionic bonding between a metal ion and an SixOyz- ion is what holds the structure

together.

E) None of the above are true.

An oxide of a Group 4 element is commonly used as a white pigment in paints, paper, rubber, and plastic, and is the accepted as the most important compound of a Group 4 element. Identify this compound.

What is the most common oxidation state of the Group 5 elements?

The boron trihalides (BX3, where X = F , Cl ,Br or I ) have varying degrees of Lewis acidity. Give the formula for the boron trihalide that behaves as the weakest Lewis acid.

Determine the minimum volume of 3.6 M HI needed to dissolve a 2.25g sample of Al. I'm so lost - please help/ explain! Thank you!

solve the differential equation y'=(2y+1)/(x+1), with condition y(0)=1.

Please help! This was a test question and I just don't know how to solve it, especially with the linear equation method. Thanks

Match the following: with:

1) .02m NH4Cl a)solution that is most strongly dependent upon pressure

2) .05m C6H12O6, b)highest boiling point

3).05m NaCl, c)largest van't hoff factor

4).005m CO2, d)solution of ionic compound with highest freezing point

5) .01m Al(NO3)3 e)solution with change in T=.026 C