Calculate the heat released when 454 g of steam at 100.0C condenses and then cools to 30.0C. State your answer in calories.
The pH of a .10M HOBr solution is 4.8 1. What is [H+] in that solution? 2. What is [OBr-]? What is [HOBr]? (where do the H+ and OBr ions come from?) 3. what is the value of Ka for HOBr? what is the value for pKa?
A battery with an emf of 14.5 V and internal resistance of 0.83 Ω is connected across a load resistor R. If the current in the circuit is 0.81 A, what is the value of R?
ok thank you all for your help i really appreciate it
because i wanted to be sure of my answers
my text says Use mentalinguistic strategies to talk explicitly about the concept of prints: "This first page is the beginning of the book." "Let's turn to the next page." "This page has lots of words in it." "Who can guess what the words ...
Emergent literacy skills are enhanced by a.quantity and quality of print and audio-visual resources b. the family socio-economic status and aspirations c.engaging in literacy event with other persons especially adults d. the educational or professional level of one or both par...
hurricanes and cyclones originate: a.in the tropics b.in temperate latitudes c.near the poles d.in the center of large land masses Is the answer a?
A hypodermic syringe is attached to a needle that has an internal radius of 0.303 mm and a length of 3.02 cm. The needle is filled with a solution of viscosity 2.00 10-3 Pa · s; it is injected into a vein at a gauge pressure of 16.1 mm Hg. Ignore the extra pressure requ...
At the surface of a freshwater lake the pressure is 102 kPa. (a) What is the pressure increase in going 34.7 m below the surface? b) What is the approximate pressure decrease in going 33 m above the surface? Air at 20° C has density of 1.2 kg/m3.