Answer:
e. When the indicator changes color and remains, 2 more drops of the solution in the buret should be added.
Explanation:
<em>Which statement is incorrect?
</em>
<em>Select one:
</em>
<em>
a. The volume of solution in the buret should be recorded when the endpoint is reached.
</em> CORRECT. At the endpoint, the titrant is expected to have completely reacted with the titrand.
<em>b. It is good practice to place the flask over a white background to better observe the color change of the solution.</em> CORRECT. Using a white background makes it easier to detect the changes in the color of the indicator.
<em>c. The endpoint is when the indicator changes color.</em>
CORRECT. This is the function of an indicator.
<em>d. Phenolphthalein will go from a colorless solution to a pink solution for the addition of NaOH to an acid solution.</em> CORRECT. Phenolphthalein is colorless when pH < 8.3 and it is pink when pH > 10.0.
<em>e. When the indicator changes color and remains, 2 more drops of the solution in the buret should be added.</em> INCORRECT. When the endpoint is reached, no more titrant should be added.
Ned gained either one
of the the two types of Forensic Nursing certifications, which include certificate
for sexual assault nurse examiners (SANE-A) for working with adults and
adolescents, and the (SANE-P) for working with pediatric patients. An
advance forensic nursing certification is also obtainable but this
certification requires submitting a portfolio documenting the expertise of the
nurse in forensic rather than taking an exam but this would also be involve in
a strict peer review process.
Furthermore, a forensic
nurse is someone who works with crime victims to identify, collect, preserve, interpret
medical evidence and provide expert testimony that can be used in court. In
addition, they are committed to accurate and careful documentation.
Answer:
Explanation:
We want to convert from moles of water to grams of water.
First, find the molar mass of water (H₂O) Look on the Periodic Table for the masses of hydrogen and oxygen.
- Hydrogen (H): 1.008 g/mol
- Oxygen (O): 15.999 g/mol
Next, add up the number of each element in water. The subscript of 2 comes after the H, so there are 2 moles of hydrogen.
- 2 Hydrogen: (1.008 g/mol*2) = 2.016 g/mol
Finally, add the molar mass of 2 hydrogen and 1 oxygen.
- 2.016 g/mol (2 Hydrogen) + 15.999 g/mol (1 oxygen)= 18.015 g/mol
Next, find the grams in 6.5 moles.
Use the molar mass we just found as a ratio.
We want to find the grams in 6.5 moles. We can multiply the ratio above by 6.5
Multiply. Note that the moles of H₂O will cancel each other out.
If we want to round to the technically correct significant figures, it would be 2 sig figs. The original measurement, 6.5, has 2 (6 and 5).
Answer:
The answer to your question is letter A. 65.9%
Explanation:
Data
actual yield = 1.20 g
theoretical yield = 1.82 g
Formula
percentage yield = 
Substitution
percentage yield = 
Simplification and result
percentage yield = 0.6593 x 100
percentage yield = 65.9 %
Hyy mate......
Here is your answer ......
<h2>
➡️⏺️Oxygen⏺️⬅️</h2>
1️⃣Name: Oxygen
2️⃣State : non-metal
3️⃣Family:Oxide
4️⃣Protons: 8
Electron:8
Neutron: 8
<u>Hope it will help you</u><u>.</u><u>.</u><u>.</u>
<u>Thanks for asking....</u>
