Answer:
Explanation:
Number of molecules = Moles x Avogadro number
= 65 x 6.022 x 10^23
= 3.9 x 10^25
Water vapor will condense back to a liquid at D) 100 degrees Celsius or 212 degrees Fahrenheit. .
Answer:
1. Beaker and Flask: These two volumetric devices are used to make coarse measurements of volume. These devices have graduated volume measurements marked on the side if the beaker and flask. The beaker and flask have a 5% accuracy.
2. Graduated Cylinder: More accurate than beakers and flask, with a 1% accuracy. Graduated cylinder are transparent with finely divided graduations. Their size vary from 5mL to 200mL.
3. Burets: These are cylindrical glassware with a valve at the bottom (commonly called a “stopcock”). They also have graduations on the side for accurate reading, and they have a 0.01mL accuracy.
4. Pipets: 12-24 inches long slender tubes, that measure predetermined volume. Mohr pipets are volumetric glassware pipets with graduations used to measure odd or fractional volumes to be provided. They have a 0.02mL accuracy. There are three types of pipets: air-displacements; positive-displacement; and the dispenser pipet.
Explanation:
The neutralization reaction would be:
HCl + NaOH --> NaCl + H₂O
Next, determine the equivalent moles of HCl from the given amount of titrant. However, there is a missing information. You should know the molarity of the NaOH to be able to solve this. Suppose, the concentration is 0.1 M NaOH.
0.1 M NaOH * 0.3255 L = 0.03255 mol NaOH
Since, the molar ratio is 1:1, then that is also equivalent to 0.03255 mol HCl. The molarity would then be:
Molarity = 0.03255 mol/0.25 = <em>0.1302 M HCl</em>