1. A student attempts to identify an unknown compound by the method used in this experiment. She finds that when she heated a sample weighing 0.4862 g the mass barely changed, dropping to 0.4855 g. When the product was converted to a chloride, the mass went up, to 0.5247 g.

a. Is the sample a carbonate? NO

b. What are the two compounds that might be in the unknown? KHCO3 and NaHCO3

c. Write the chemical equation for the overall reaction that would occur when the original compound was converted to a chloride. If the compound is a hydrogen carbonate, use the sum of Reactions 1 and 2. If the sample is a carbonate, use Reaction 2. Write the equation for a sodium salt and then for a potassium salt.

d. How many moles of the chloride salt would be produced from one mole of original compound? _____

e. How many grams of the chloride salt would be produced from one molar mass of original compound? Molar masses: NaHCO3 84.008 g Na2CO3 105.99 g NaCl 58.44 g KHCO3 100.118 g K2CO3 138.21 g KCl 74.55 g

If a sodium salt, ____________ g original compound → ____________ g chloride I

f a potassium salt, ____________ g original compound → ____________ g chloride

f. What is the theoretical value of Q, if she has an Na salt? ____________ if she has a K salt? ____________

g. What was the observed value of Q? ____________

h. Which compound did she have as an unknown?

I have bolded my own answers. I need help with the rest, please show work!

A factorial experiment was designed to test for any significant differences in the time needed to perform English to foreign language translations with two computerized language translators. Because the type of language translated was also considered a significant factor, translations were made with both systems for three different languages: Spanish, French, and German. Use the following data for translation time in hours.

Test for any significant differences due to language translator system (Factor A), type of language (Factor B), and interaction. Use a= .05.

Complete the following ANOVA table (to 2 decimals, if necessary). Round your p-value to 4 decimal places.

The Beer’s Law calibration curve for this experiment was obtained at the appropriate wavelength and gave the following linear regression equation:
Absorbance = 4898 (Concentration) + 0.055

Suppose 5.0 mL of 0.0020 M Fe(NO₃)₃ dissolved in 0.50 M HNO₃ are mixed with 5.0 mL of 0.0020 M HSCN dissolved in 0.50 M HNO₃, and the absorbance of the solution is measured to be 0.30. What is the equilibrium constant for the following reaction? Assume that the H⁺ concentration stays constant at 0.50 M.

Fe³⁺(aq) + HSCN(aq) ⇌ FeSCN²⁺(aq) + H⁺(aq)

Rank the following option-free bonds based on their reinvestment risk, from the highest to the lowest:

Bond U: a 20-year zero-coupon bond

Bond V: a 20-year 8% coupon bond

Bond W: a 2-year 8% coupon bond.

. Provide a weighted directed graph G = (V, E, c) that includes three vertices a, b, and c, and for which the maximum-cost simple path P from a to b includes vertex c, but the subpath from a to c is not the maximum-cost path from a to c

Reflect on the section Planning and Executing Change Effectively, in Chapter 7 of the text (book) Carpenter, M., Bauer, T., & Erdogan, B. (2010). Management Principles, v. 1.1. Summarize the key steps in planning and executing change in a 500 word or more journal entry.

Can irreversible isothermal work be used to predict spontaneity of processes for thermodynamic systems in the same way as mechanical systems (which follows the principle: Mechanical systems with spontaneously lower their potential energy V)?

Please provide and argument for your answer. This is supposed to be a debatable question.