Wednesday
December 11, 2013

Posts by Unknown

Total # Posts: 834

Chemistry;HELP
1. What volume will a sample of hydrogen occupy at 128.0 oC if the gas occupies a volume of 2.23 dm3 at a temperature of 0.0 oC? Assume that the pressure remains constant. (remember to change to Kelvin). 2. If a gas occupies 1733 cm3 at 10.0 oC, at what temperature will it oc...

Chemistry;HELP
Help me set them up and then check my answers? Round your answer to the correct number of significant digits and show work. 1. How many grams of NaI would be used to produce a 2.0 M solution with a volume of 10.00 L? 2. What is the molarity of a 2.50 x 102 cm3 solution contain...

I did correct #1. It's (-1.5,0) but, I still don't know the length. Can you help? #2. How do I put it in correct form?

Wait. How do I correct 1 and 2?

For each graph, find (a)AB to the nearest tenth and (b)the coordinates of the midpoint of AB. 1. Coordinates are A(-9, -6) B(6,6) D=19.2 Midpoint=(1.5,-6) 2.A(-2,-2) B(8,-6) D=10.77 midpoint= (3,-4) 3. A(0,3) B(-2,-2) D=5.4 Midpoint= (-1,0.5)

Geometry
Which of the following best describes the front and back cover of a textbook when closed?

Chemistry;HELP
How did he get 15 moles? What is the molarity of a 5.00 x 102 ml solution containing 2490 g of KI? 5.00*10^2ml = 500ml = .5L KI has molar mass 166, so you have 15 moles of KI 15moles/.5L = 30moles/L = 30M

Geometry, Help