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Which objective lens(es) in our microscopes can be used with immersion oil? (Check all that apply.)

Heartworms can be detected in dogs by blood antigen tests, microfilaria tests, and fecal floatation.

Which of the following items are needed to perform a simple fecal float? Select all that apply.

Name the following parts of the microscope in the image below: 2, 4, 6, 13, 15, 17

Heartworms are transmitted by

Going from room temperature, 298 K, to {T} K, the rate of a reaction doubles. Calculate the activation energy for the reaction in kJ/mol.  R = 8.314 x 10-3 kJ/mol Answer format:  Enter in standard notation, not scientific using 3 sig figs.  Do not include units.  

Using information from the previous problem and at the bottom of the page , identify  1) Do the electrons in the wire flow go to the right or to the left? 2) Over time, does the Zn electrode mass increase or decrease? 

Which of the reaction diagrams best shows a reaction with a change in enthalpy, ΔHrxn = -50 kJ/mol and an activation energy, Ea = 50. kJ/mol.

Suppose a Voltaic/Galvanic cell at 298 K runs on the reaction,  Sn(s) + Nr2+(aq)   à  Sn2+(aq) +   Nr(s), where Nr is a fake element with the reduction potential,    Nr2+(aq) + 2e- à Nr(s)         E°1/2 = 0.40 V.  The cell contains the following concentrations in each half cell: Sn(s) /Sn2+, [Sn(NO3)2] = 0.70 M               Nr(s)/Nr2+, [Nr(NO3)2] =  {M} M      What is the value of Ecell?            Answer format:  Enter the answer in Volts but do not include the units.  Enter 2 sig figs in standard, not scientific notation. 

What mass of silver metal (molar mass = 107.87 g/mol) will be formed by passing {I} A through AgNO3(aq) for {t} seconds?  Answer format:  Enter your answer in grams but do not include the units.  Enter 2 sig figs in standard, not scientific notation.