Most Americans remember Abraham Lincoln’s second Inaugural Address for the line “with malice toward none; with charity for all.” Often overlooked, however, is his line that:  

This Thomas Cole painting:

Please write a paragraph identifying and explaining what you think are the three most important long-term factors before 1850 that ultimately contributed to our national fragmentation in 1861. Feel free to examine a broad scope of history when considering your options. For example, you might want to pick your three choices from a field that includes everything from the before the constitutional convention to the long shadow of market revolution, court decisions, expansion, foreign policy, intellectual and cultural shifts, party politics, race, reform, technology, westward expansion, etc., etc.

Please write a paragraph explaining the historical and cultural significance of the election and presidency of Andrew Jackson. Please be sure to bring in specific evidence to support your answer.

Which statement describes the law of conservation of mass?

Exam 2_Question 13 The image shows two types of light hitting a metal surface. One causes electrons to be ejected, and the other does not. Which statement best explains this behavior?

Determine the empirical formula for the compound with the molecular formula C14H10O4. Assume all atomic weights are whole numbers unless otherwise noted. 

In a chemical reaction, 18.0 grams of hydrogen peroxide decompose into 16.0 grams of water and oxygen gas. What mass of oxygen gas is produced?

A compound has an empirical formula of C3H7N2O. The molar mass of the compound is 174 gmol. What is the molecular formula of the compound? Assume all atomic weights are whole numbers unless otherwise noted. 

An unknown Element X has two naturally occurring isotopes:X-62 (mass = 62.0 amu)X-64 (mass = 62.0 amu)The average atomic mass is 62.8 amu. What is the percent abundance of each isotope? Round each percent to the nearest whole number or tenth as appropriate.