Answer: C) Elements and pure compounds are homogeneous materials because they have a uniform composition throughout.
Explanation: Element is a pure substance which is composed of atoms of similar elements. Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.
Elements are compounds form homogeneous materials as they have uniform composition throughout and the components are evenly distributed throughout the material.
Mixtures are heterogeneous materials as they do not have uniform composition and the components are not evenly distributed throughout the material.
We are given with
<span>ΔHo = 38.0 kJ
ΔSo = 112.9
for these standard conditions:
To = 25 C
Po = 1 atm
Using the Clapeyron Equation
ln (P/Po) = (</span><span>ΔHo / R)(1/T1 - 1/T2)
Substitute the values and solve for P (Temperature should be in Kelvin)</span>
Answer: Nov 24, 2010 · A buffer solution is 0.100 M in both HC7H5O2 and LiC7H5O2 and has a pH of 4.19. Which of the following pH values would you expect from the addition of a small amount of a dilute solution of a strong base? A. 4.49 B.3.89 C.5.69 D. 3.69 E. There is not enough info to determine
A 1.0L buffer solution contains 0.100 mol of HC2H3O2 and 0 ...
Mar 29, 2016
A 1.00 L buffer solution is 0.250 M in HF and 0.250 M in ...
Jul 05, 2011
Explanation:
It would cost a little less than one thing but it was a little bit too late to get it to me
To find the density, the formula would be d= m/V. Your answer would be 19.9 or if you round, 20.
