1. Basically, when is glass stoppered buret used? ______________________________ ____________________________________________________________________ When is rubber stoppered buret used? ____________________________________ ________________________________________________________________________________________________________________________________________      When is a PTFE buret used?

Q: Give one reason why we cannot reuse boiling chips?

A: Boiling chips are small, porous stones that are made of calcium carbonate or silicon carbide. It is…

Q: definition of plastic and source and usage of plastic

A: Hydrocarbons: Polymers are essentially molecules that exist as very long chains. Most polymers are…

Q: When using a TD pipet, one should not O blow or shake out the remaining liquid O place the meniscus…

A: Given that : We have to identify that while using TD pipet one should not :

Q: What made an ashless filter paper ashless?

A: Ashless filter paper is purely made up of cellulose.

Q: I need help on all parts

A: a. The balanced nuclear reaction for the beta decay of Th-234 is given below : T90234h  →  P91234a…

Q: In terms of chemical protective clothing, what is the difference between penetration and permeation?…

A: To answer difference between penetration and permeation

Q: Many reflux procedures involve a required length of time for the reflux to occur. When should you…

A: The time period should begin when the solution is not just boiling but actively refluxing in the…

Q: NaOBut CH,NO2

A: nucleophilic addition of carbanion to α,β-unsaturated carbonyl compound (MICHAEL REACTION)  example…

Q: Which composite or chemical to protect the sun visor from meltingdo you prefer ?

A: The sun visor's flap or core is typically made from pressboard with piece of metal. Metals are…

Q: Solid

A: In this question we have to choose correct option of the above statement.Along with this we also…

Q: rubber has lower crosslinking density than general thermoset such as epoxy materials True or False

A: True

Q: (a) What are the constituents of ‘copper matte’? (b) What is the role of depressant in froth…

A: a. The constituents of copper matte are  Cu2S and FeS

Q: Below is the polymer Teflon (used for non-stick coating) F F F F The monomer used to make the…

A:

Q: Why is it important to cool the conderser?

A: A question based on analytical process that is to be accomplished.

Q: Please research the following and reference your sources: 1. The environmental impact of disposing…

A: Question 1 - - > Environmental impact of disposing of plastics -  Long-term use of plastics and…

Q: Match the answers. Base oils Choose. Polyglycols Ideal hydraulic fluid Antifoam agents Solvent…

A:

Q: How does DIY cold pack works?

A: DIY cold pack

Q: To test melting point the sample should: * O expose to high rate of heating be in large amount…

A: The sample should be in large amount inside the capillary tube.

Q: List some improvement about plastic bottle.

A: 1. Plastic bottles can be recycled and used to make clothes, carpets , toys and packaging materials.…

Q: The purpose of fluting filter paper.

A: fluting filter paper when performing a gravity filtration it means folding a filter paper to give a…

Q: What are Venturi jet scrubbers?

A: An ejector or jet venturi scrubber is an industrial pollution control device, usually installed on…

Q: 7.25 The lower yield point for an iron that has an average grain diameter of 1 x 10-2 mm is 230 MPa…

A: In this case, the grain diameter at which the lower yield point will be 310 MPa needs to be…

Q: ermosetting polymer

A:

Q: Why do you think a large excess of sulfolene was used? This is the expermimnet:  Mix 2.5 g of…

A: In the experiment mentioned, sulfolene was used to generate 1,3-butadiene, which is the main…

Q: Briefly explain why it is important to use crucible tongs when you transfer the heated crucible (a)…

A: (a) It is very important to use crucible tongs when you transfer the heated crucible, why because…

Q: Is it possible to do polypropylene face masks into carbon dots

A: Interpretation -  We have to interpretate that , Is it possible to do polypropylene face carbon dots…

Q: Many reflux procedures involve a required length of time for the reflux to occur. When should you…

A: Given: Many reflux procedures involve a required length of time for the reflux to occur.

Q: List out merits and demerits of any one technique under top down and bottom up to synthesize carbon…

A:

Q: The scale pattern of hair’s ___________ can beobserved by making a cast of its surface in clear…

A: Scales of most animal hair are like shingles on a roof. The cuticle is a translucent outer layer of…

Q: here are seven resin codes of the plastics and these codes are often indicated in the bottom of the…

A: Plastics are the non-biodegradable polymers. Being non-biodegradable, these need to be recycled so…

Q: What is the purpose of the layer of sand at the top of the column? To protect the top of the packing…

A: Sand is added on the top of the column (above silica layer) so that when the sample is applied, the…

Q: a)I'm creating a product I want to be somewhat elastic and bendable but still a little firm. b)l…

A:

Q: Freaction h

A:

Q: Label the top face. top H3C bottom

A:

Q: A veneer can be bonded to tooth structure or a metal subframe. a. True b. False

A: A veneer is a layer of material placed over a tooth. Veneers can improve the aesthetics of a smile…

Q: Which refluxing apparatus is set up to keep moisture out? A OC O B and C OA OB none • Ren B PAGINION…

A: To keep the moisture out of your reaction, we have to use a drying tube and the inlet adapter in the…

Q: HNO Select Draw Rings More Erase N H.

A:

Q: 1. What is the purpose of the boiling chips?

A:

Q: Briefly describe how you should protect your hands while you are inserting glass tubing into a…

A: While inserting glass tubing into a stopper, there are always some chances of cuts. But, attention…

Q: maintain the dryness

A: In this question we have to explain that why is there a need to maintain the dryness of the…

Q: Why is spandex both strong and flexible?

A:

Q: SAFETY: When performing a vacuum distillation it is important to: (more than one answer may be…

A: Among the given statements, the important steps to be followed while performing vacuum distillation…

Q: Why is unglazed porcelain plate used for streaking rather than any other plate?

A: The streak of a mineral is the color of the powder left on the streak plate when the mineral is…

Q: difference

A: This question is related to proteins.

Q: pinacol rearangement

A:

Q: Why is it important to avoid any scratch on the cuvette?

A: The cuvette is used as a container for samples in spectroscopic measurements. Such as for the…