Answer: The rate of the reaction decrease over time as the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions.
Explanation:
Rate of a reaction is defined as the change in concentration of products and reactants with respect to time.
The rate of a reaction decreases with times because reactants are converting into products.
As a result, the reaction is proceeding with a decrease in the concentration of reactants due to which less number of collisions between the reactant molecules will be there.
Hence, rate of reaction will decrease.
Thus, we can conclude that the rate of the reaction decrease over time as the reaction proceeds, a decrease in the concentration of reactants results in fewer successful collisions.
Answer:
Explanation:
Muscles in a kangaroo’s legs work because of the cells that make up the muscle. Which component of cell theory does this best illustrate?
All living things are made of cells.
Cells are the basic unit of structure and function of all living things.
All cells come from other cells.
Cells are generated from nonliving materials.
Cells are the basic unit of structure and function of all living things.
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The formatting of the question is a bit scrambled: I'm not sure if there are separate steps that have been unintentionally consolidated into a seemingly discrete step, nor am I sure which letters actually correspond with which step(s). So, for clarity's sake, I treated every sentence as its own step and arranged all of them accordingly. Hopefully, you can then reorganize them according to the labeled steps as you have been provided.
- Suspend a separatory funnel using an iron ring and ring stand.
- Make sure the stopcock is closed.
- Transfer the organic (dichloromethane) layer to the funnel.
- Add an equivalent volume of aqueous acid to the dichloromethane layer in the separatory funnel.
- Cap the separatory funnel with a glass or Teflon stopper.
- Remove the funnel from the iron ring and shake vigorously to mix the layers, periodically venting to release pressure.
- Place the separatory funnel back in the Iron ring.
- Allow the layers to physically separate in the funnel.
- Remove the cap.
- Drain the bottom layer into a labeled beaker.
- Label the beaker "Organic Layer".
- Drain the remaining liquid into a labeled beaker.
- Label this beaker "Aqueous Layer".
- Transfer the "Organic Layer" back to the empty separatory funnel.
- Repeat all steps.
Notes:
- The letters have been replaced with numbers only to clarify the order of the steps. No changes were made to the steps themselves, including any stylistic errors.
- A <em>very few</em> set of sequential steps might be interchangeable, but the steps as separated and organized above is in accordance with standard liquid-liquid extraction protocol.
- Determining which layers are the "organic" and "aqueous" layers (i.e., whether the organic/aqueous layer, or vice-versa, is on the bottom/top ) is a nontrivial step; for this reason, when actually doing such extractions, the beakers (or whatever vessel) into which the layers are drained at any step are sometimes labeled "top layer" and "bottom layer" in case you misidentify which layers are, in fact, the organic and aqueous layers. Oftentimes, the organic layer is on top of the aqueous layer as many common organic solvents are less dense than water. Halogenated organic solvents, like dichloromethane, are one of the exceptions, and so will generally comprise the bottom layer.
Answer:Heat is a type of ENERGY. When absorbed by a substance, heat causes inter-particle bonds to weaken and break which leads to a change of state (solid to liquid for example). Heat causing a phase change is NOT sufficient to cause an increase in temperature.
Explanation:
Answer:
The alkenes are shown below in the drawing, indicating which is more polar.
Explanation:
In the first pairs of alkenes, the 1-butene have a dipole moment due to the inductive effect of the group, instead the trans-2-butene do not present it since the dipoles are counteracted.
In the second pair of alkenes the cis hex-2-ene is more polar because the substituents provide greater dipole moment to the molecule.
For the last pair of alkenes, the same happens as in the first pair of alkenes, in the hex-3-ene trans compound the dipole moments are canceled.
