Chemistry
A 55.81 gram irregular object made out of one of the metals in #6 raises the water level in a graduated cylinder from the 17.6 mL level to the 24.7 mL level. What is the density and identity of the metal?
Chemistry
I dont know the masses
Chemistry
Mass of weighed filter paper ? Mass of weighed filter paper plus recrystallized vanillin? Mass of recrystalized vanillin Mass impure vanillin Percent recovery Suggest how you could have improved your techniques to increase your percent recovery.
algebra
Factor out the greatest common factor in the expression? 11y^5-55y^2
algebra
2/3x-1/5y=2, 4/3x+4y=4
algebra
5x-2=y, 10x=4+2y
algebra
solve; 3x-y=-5, -2x+5y=-14
algebra
find the slope of a straight line that passes through the given pair of points (5,6) and (-3,1)
algebra
perform the indicated operation: 3/5 x 7/10
Chemistry
I have a 500mL flask, and I want to prepare 500mL of NaOH solution with a pH of 13.00. How many grams of Na OH do I need to put in the flask to arrive at this pH?
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