Answer:
A volumetric flask is lab glass or plasticware used to prepare a solution. It is used to make up a solution to a known volume. Volumetric flasks are used to measure volumes much more precisely than beakers or Erlenmeyer flasks.
I don’t see the complete question
Answer:
668.9K is the final temperature
Explanation:
The change in entropy, ΔS, of an ideal monoatomic gas is obtained using the equation:
ΔS = n*Cv*ln (T2/T1)
<em>Where ΔS is change in entropy = 200J/K</em>
<em>n are moles = 20.0mol</em>
Cv is 3/2R for an ideal monoatomic gas (3/2*8.314J/molK)
T2 is final Temperature and T1 initial temperature = 300K
Replacing:
ΔS = n*Cv*ln (T2/T1)
200J/K = 20.0mol*3/2 *8.314J/molK*ln (T2/300K)
0.80186 = ln (T2/300K)
2.23 = T2 / 300K
<h3>668.9K is the final temperature</h3>
The mass percent of a NaCl solution prepared by mixing 47.0 g NaCl with 125.0 Ml of pure water is 27.3%
calculation
% mass =mass of solute / mass of the solvent x 100
mass of the solute(NaCl )= 47 g
mass of the solvent = mass of pure water + mass of NaCl
convert 125 Ml of pure water to grams
that is 1 ml = 1 g therefore 125ml = 125 g
mass of solvent is therefore= 125g+ 47=172g
therefore the % mass = 47/172 x100 = 27.3 %
Metal period- Reactivity Gets smaller as you move from left to right.
Group- Reactivity gets bigger as you move down a group.