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Calculate ?H?rxn from ? H? f values (in appendix II) for the following reaction: 4 NH?(g) + 5 O?(g) -> 4 NO (g) + 6H?O (g)

You place 50.0 mL of 0.500M NaOH in a coffe-cup calorimeter at 25.00? C and carefully add 25.0 mL of 0.500 M HCI, also at 25.00?C. After stirring, the final temperature is 27.21?C. Calculate Qsoln (in J) and ?Hrxn (in kJ/mol). please show me how to do this.. thanks

You place 50.0 mL of 0.500M NaOH in a coffe-cup calorimeter at 25.00? C and carefully add 25.0 mL of 0.500 M HCI, also at 25.00?C. After stirring, the final temperature is 27.21?C. Calculate Qsoln (in J) and ?Hrxn (in kJ/mol). please show me how to do this.. i know this problem will be on the...

1) In India, Tata Motors is an insecure monopolist operating in the generally oligopolistic auto industry because Nissan and Renault are planning to release a car to rival Tata's Nano, which currently is the only car of its kind on the market. a) True b) False 2)Assume that a firm has not yet...

solving a system of linear equations using matrices (row echelon form) solve: x-y+z=8 (1) 2x+3y-z=-2 (2) 3x-2y-9z=9 (3) plzz help thanks

Find the equation of the parabola described. find the two points that define the latus rectum, and graph the equations by hand 19) focus at (4,0); vertex at (0,0) can anyone please explain how to do this problem.. i have a test tomorrow.. thanks

1) Government generally takes responsibility for ____ policy. a) Microeconomic b) Moral Impact c) Macroeconomic d) Moral Economic i chose A 2) The most consistent force for economic growth and progress is a) Government regulation b) The gross domestic product c) Technology integration d)...

hey guys, i am doing ready bad in my economics class... and now i have to take this review quiz online which has like 30 multiple choice questions... and i only have 40 minutes to do it... so if you guys can help me i can open the review in 5 minutes and copy and paste the questions here.. and...