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Alla [95]
3 years ago
12

When making observations during an experiment, which of the following must be included? a. Descriptions of the appearance of any

chemicals used. b. Explanations for why certain steps were carried out analysis of results. c. Descriptions of any changes in the system following an action. d. Descriptions of any non-changes in the system following an action a list of possible errors.
Chemistry
1 answer:
sweet [91]3 years ago
8 0

Answer:When making observations during an experiment, Descriptions of any changes in the system following an action and Descriptions of any non-changes in the system following an action a list of possible errors must be included. The correct option is C and D.

Explanation: During a scientific experiment procedures, observation is usually carried out to take into consideration an active information from the natural source. Data can be collected by the observer:

- quantitatively ( by counting and measuring data when numerical values are attached.

- qualitatively ( when the presence or absence of a property is noted). Hence, option C and D are correct.

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It should be  <em>Ultraviolet rays </em>because they are moderate in energy.


3 0
3 years ago
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How do you find the number of electrons in a atom?
olganol [36]

look at the atomic number using the periodic table. The Atomic number equals the amount of protons and the amount of protons equals the amount of electrons

7 0
3 years ago
A protein that binds to glutathione can be purified using an affinity column where the solid phase is a cellulose matrix covalen
miskamm [114]

Answer:

High concentration of glutathione should be included in the elution buffer for the given experiment to remove protein from the column.

Explanation:

Affinity chromatography is one of important biochemical technique of chromatography which depends on the affinity of ligand for the receptor.Here the ligand is a protein mixture which act as mobile phase and the receptor is present in the wall of chromatography column act as stationary phase.When the protein mixture is applied on the top of the column the substances present within the protein that have high affinity for the receptor present in the walls of chromatography column binds to the later but rest of the protein pass away through the column.High concentration of ligand is used within an buffer solution to remove the desired protein from the column.

    From this point of view it can be stated that in the given question high concentration of glutathione should be used to remove the desired protein from the column.

 

7 0
3 years ago
How long can a sunflower grow? Hypothesis
Ghella [55]

Answer:

Up to 80 - 120 days.

Explanation:

The flower will probably stay six to twelve days or so.

I'm not sure what's your hypothesis going to be, but I'll give you an example.

" <em>If</em>  I __________, <em>then</em> the sunflower will grow up to 80 to 120 days."

In the blank space, you can write what you're going to do to your sunflower during the experiment.

Please correct me if I'm wrong.

5 0
3 years ago
in an oversight in the experiment jamie did not add the 4-5 additional drop of 6M JNO3. as result, will the reported number of m
kaheart [24]
The reported number of moles will be too low since the additional amount of oxygen is not included. It may be 6 drops but the molarity of the solution is 6M. this meas that for every ml of the JNO3 solution there is 6 moles of JNO3. In every mole of <span>JNO3 there are 3 moles of oxygen. So in every drop of oxygen there are 18 moles of oxygen. </span>
6 0
3 years ago
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