Physics
A gas is confined in a 0.47-m-diameter cylinder by a piston, on which rests a weight. The mass of the piston and weight together is 150 kg. The atmospheric pressure is 101 kPa. (a)What is the force (in Nt) exerted on the gas by the piston, the weight and the atmosphere combine...
physics
1/2at^2
Accounting
A. $6,853
Chemistry
A 25.00 mL sample of seawater taken from a depth of 1000 meters weighs 25.75 g. What is the density of seawater?
Chemistry
The value of delta H for the reaction below is -1107kj. 2Ba (s) + O2 (g) -> 2BaO (s) How many kJ of heat are released when 5.75 g of BaO (s) is produced? Here is how I approached this problem: 1. Converted 5.75 g of BaO to mol: 5.75g x (1mol BaO/153.3g BaO) = 0.0375 mol BaO...
Chemistry Lab
Using the molarity of fromic acid (HCOOH): 0.1033 Calculate the percent by mass of fromic acid in unknown solution. Assume the density of aqueous fromic acid solution is 1.000 g/mL. Need help setting up this problem. Thank you.
Chemistry
Write a balance ionic and net equation for the following: KOH + HC2H3O2 I came up with the following but think this is wrong: KOH + HC2H3O2 -> H2O (l) + KC2H3O2 (aq)
Chemistry Lab
You need 123 mL of 0.245 M NaOH solution for a certain experiment, and the only solution available in the lab is 1.252 M. How many mL OF THE 1.252 M NaOH would you need?
Chemistry Lab
If 12.50 mL of 0.324 M HCl is diluted to 250.00 mL, what is the concentration of HCl in the final solution?
Chemistry
I came up with this but not sure if it's right: D = 1mol/22.4L x 2.02g/1mol = 0.0902g/L
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