Sunday
May 19, 2013

# Posts by SAMANTHA

Total # Posts: 1109

Algebra II
Simplify the expression in exponential notation. a*a*a I thought it was a^3 but that was wrong.

Math
Select all that justify the following statement. 2 * 1/2 = 1

math,probability
I just don't understand how to start it, I need structure , I can figure out the rest, don't know how to get into a strategy.

math,probability
Hi, I don't understand a homework question, can anyone please help me? I'm bad at probability. what is the probability that when you pick two cards, you will select at least one king out of two in a deck of six standard cards? (assuming there are no jokers)

Chemistry
How do I calculate the joules to heat 17 g of water from 22 degrees C to 78 degrees C?

Math
The ratio of the maximum speed of Car A to the maximum speed of Car B is 2:3. Explain whether Car A or Car B is faster.

chem
^

urgent i need help within an hour!
Ascorbic acid (vitamin C, C6H8O6) is a water-soluble vitamin. A solution containing 83.3 g of ascorbic acid dissolved in 210. g of water has a density of 1.23 g/mL at 55°C Calculate the molarity of ascorbic acid in this solution. i got 2.77 but its wrong

chem
a was incorrect

chem
Calculate the number of moles of solute present in each of the following solutions. a) 39.0 mg of an aqueous solution that is 1.00 m NaCl b)90.0 g of an aqueous solution that is 2.10% sucrose (C12H22O11) by mass.

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