Recent content by Zoey Brown

From the list below, identiyfy what is present in the flask at each of the following times during the Dumas procedure performed with methanol: Methanol (g) Methanol (l) Methanol (aq) Air (g) Water (l) Water (g) a) After the methanol is added and the flask is covered with foil? b) Just...

Homework Statement I have found, through experimentation, the ksp of calcium hydroxide to be 3.0 x10^-7 (which i know has a pretty large percent error). However, i am conflicted as to what the units should be because logically, plugging the units into the ksp equation should give you units of...

So if the solution was partially neutralized by carbon dioxide, would that mean that it was less basic and therefore more of the calcium hydroxide solution would have to be used in order for it to be standardized by the KHP? And that would be a cause for the increase in volume used, which...

the KHP was measured exactly each trial, all proper titration procedures were followed, and phenolphthalein was used. However, in any case i doubt such errors would result in such a large deviation from the theoretical value

Homework Statement I conducted a titration experiment in which 0.1g of KHP was dissolved in 50mL of distilled water and placed in an Erlenmeyer flask. I filtered a Ca(OH)2 solution (that was left out open on the lab benches for us to use) and put that into the burette and titrated. Ultimately...

The graph I have made of Average Orbital Distance from the Sun vs. Average Orbital Velocity illustrates a decreasing exponential function. How, if it does, would this suggest that there is dark matter present in our solar system?

Homework Statement A student has 250ml of 1.5M HCl and 150ml solution of 2.0M Ba(OH)2. When he mixes the 2 together, is the combined solution acidic or basic? Homework Equations n=cv ph=-log[h] The Attempt at a Solution the limiting reactant is Ba(OH)2. it is .3 moles which means bacl2 will...

would it be 2.316 g

so if I've found that there are 0.00807906 mol of Na2CO3, where would i go from there to find the formula of the hydrate?

so does the 2.316g not include the xh2o?

Homework Statement The formula of a hydrate may be determined by titarion. If 2.316g of a hydrate of sodium carbonate is required to completely neutralize 38.49 mL of 0.4198 mol/L HCl,find the formula of the hydrate. The products will be NaCl, H20, and CO3 Homework Equations n=cv m=mM The...

Homework Statement A solution of copper 2 sulphate is prepared by placing 5.80g of copper 2 sulphate in a flask and adding enough water to prepare 125 ml of solution. When a 25.0ml sample of this solution is added to 125ml of 0.125 mol/L sodium hydroxide a precipitate forms. Calculate the mass...

1. The Lead is the final decay product of uranium-238 (half life = 4.7 billion years), so often the uranium is embedded in lead. The decay of 1.00 g of uranium to thorium converts 6.83x10-8 kg of mass to energy. Assuming the uranium absorbs none of the heat, what would be the...

HEY FIZZIX, i did as a matter of fact, thanks for confirming good sir.

In modern nanotechnologies, metals can be vapourized to coat onto the surface of another material as a thin but hard protective layer. How much energy would it take to heat 0.55 kg of iron from 1400oC to vapour at 2050oC?