Potassium metal reacts violently when added to water according to the balanced equation: 2 K(s) + 2 H2O(l)  →  2 KOH(aq) + H2(g) How many moles of H2O are needed to reactcompletely with 7.54 mol of K? DO NOT INCLUDE THE UNIT IN YOUR ANSWER. (Neatly write your calculation on a scratch paper, show your work slowly on the webcam before you submit the test. Take a photo of your work, and submit it on Final Exam Work assignment on the module.) 

How many carbon atoms are in 3.85 mol of carbon?

What coefficient is placed in front of O2 to complete the balancing of the following equation?   C5H8   + ? O2  → CO2   + H2O

Consider the reaction, C2H4(g) + H2(g) —> C2H6(g), where ∆H= –137 kJ. How much heat is released when 3.60 mol of C2H4reacts? DO NOT INCLUDE THE UNIT IN YOUR ANSWER. (Neatly write your calculation on a scratch paper, show your work slowly on the webcam before you submit the test. Take a photo of your work, and submit it on Final Exam Work assignment on the module.) 

Which of the following is the closest value for the bond angle around the oxygen atom in H2O?

Given that 1 inch = 2.54 cm, 1 cm3 is equal to                         in3.  

Which statement describing atoms is FALSE?

Which of the following number has the largest number of significant figures? A) 0.000345 B) 0.1030 C) 1.3000    D) 10.0       E) 0.01500

What would happen to a red blood cell when it is placed in a hypertonic solution?

Consider the reaction of sodium metal and oxygen described by the balanced equation: 4 Na + O2   →   2 Na2O If 2.55 mol of sodium reacts, and 75.0 g of Na2O is obtained, what is the percent yield? DO NOT INCLUDE THE UNIT IN YOUR ANSWER. (Neatly write your calculation on a scratch paper, show your work slowly on the webcam before you submit the test. Take a photo of your work, and submit it on Final Exam Work assignment on the module.)