say A -> B + 5kJ would reactants have more enthalpy or products have more enthalpy? I think first, the delta H would be negative. So H final must be less than H initial. So reactants have more enthalpy?
February 27, 2008
They all have values around there, so I'm sure the proportionality is something like that. But I'm supposed to graph it to show this proportionality and I'm not sure what goes on the axis. Is the y-axis f and x-axis 1/length^0.5 or is the y-axis 1/f^2 and x-axis ...
February 18, 2008
Using the data below, suggest a proportionality statement. Length (cm) Frequency (Hz) 100 0.46 80 0.52 60 0.62 40 0.74 20 1.01 I think it's f ¡Ø 1/¡Ìlength (one over square root of length) or is it l ¡Ø 1/f^2 By the way, the length is...
February 18, 2008
Write the oxidation and reduction half-reactions of a corroding galvanized nail exposed to rain. The question says "galvanized" so its zinc. Zn(s) -> Zn2+(aq) + 2e- potential: +0.76V rain is slightly acidic, so i thought it would be O2(g) + 4H+ + 4e- -> 2H2O ...
February 15, 2008
I need help solving this question. "Two charges are 10 meters apart. The charge on the positive particle is 1.0 C and the negative charge is 10 Coulombs. Calculate the magnitude of the electrostatic force of attraction between these two charges."
January 25, 2008
I need help studying for my term. I need to know how to identify stuff on a staff or musical notation. Like clefs, notes, signatures, etc... How should I remember these? Are there any online resources? I also need to define terms. How do I remember these terms for the finals?
January 24, 2008
How to graph a system of linear inequalities. How to figure out the points. y<-5x-7 y>2x+7 Plot the line y=-5x -7 I assume you know how to do that. Now, since y is less than that line (look at the original equation), the area of allowability is BELOW that line. Now plot ...
April 1, 2007
acids and bses
how is an acid made? good question? they are made from lemon juice and sour things There must be thousands of acids and bases. And are you talking about making an acid in the lab or making it commercially. For example, HNO3, nitric acid, may be made in the lab by reacting a ...
November 24, 2006
Diagram these sentances: 1Maggie woke me up with her silly crying. 2Darby cried, too. 3I awoke quickly. 4What was the matter? 5The hungery dogs barked and ran into the kitchen. Here are two wonderful websites that will help you with diagramming: http://members.cox.net/teachro...
November 19, 2006
anything wrong with these questions? like grammer? 1. ¿Quién encontró la ciudad de Salamanca? 2. ¿Quién empezó la revolución en Francia? 3. ¿Por qué es Salamanca popular con turistas? 4. ¿Quién son ...
October 27, 2006
Gold is alloyed with other metals to increase its hardness in making jewelry. Consider a piece of gold jewelry that weighs 9.85 g and has a colume of 0.675 cm cubed. The jewelry contains only gold and silver, which have densities of 19.3 g/cm cubed and 10.5 g/cm cubed, ...
July 25, 2005