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How you might use Rf values to identify an unknown substance?
Although Rf values technically remain constant if the following are held constant: * solvent system * adsorbent * thickness of the adsorbent * amount of material spotted * temperature They are generally not used to identify an unknown substance specifically, since these factors are sometimes difficult to control. Most generally, during a chromatography experiment an unknown sample can be compared directly to a known sample simultaneously, i.e. they will have similar Rf values.
When might it be helpful to identify an unknown element?
It is helpful to identify an unknown element when you are exposed to a lot of it. This element could be very dangerous to you.
How long does it take blood to dry?
It only takes a few minutes for a small sample of blood to dry. It might take about an hour for a large sample of blood to dry.
Situation where you might use the iodine colorimetric test?
You can use idodine to identify starches in substances.
Why would you never use the sour taste property to identify an unknown acid?
Because it might dissolve your tongue or poison you!
How might you identify whether a mineral sample might be lodestone?
sniffing butts.XD
How might you identify whether a mineral might be lodestone?
sniffing butts.XD
What things might influence the prediction while taking a sample?
Samples are great for testing whether your prediction(or hypothesis) was right. Data, observations and your friends' predictions might influence your prediction while taking a sample.
Sample hospitality assessment identify coaching needs?
A hospitality assessment to identify coaching needs looks at how well workers perform and helps to spot weak areas where they need some additional training. A sample question for this type of assessment might be 'Does the employee smile at the customers?'
Is there water on the moon that humans can drink?
Scientists think there might be some water in the polar regions of the moon. They have to sample it first before deciding whether or not the water is potable.
Why are chemical properties not always used to identify minerals?
Testing the chemical properties of a mineral might damage the mineral sample. Also, these tests can be complex and may require expensive equipment.
Does well water have a high alkalinity?
It might or it might not. Find out by testing it with a 'pool kit' or taking a sample to a lab for proper analysis. -If you drink it this is essential.It might or it might not. Find out by testing it with a 'pool kit' or taking a sample to a lab for proper analysis. -If you drink it this is essential.
How can you abbreviate sample?
Sample is not a word that you would have a common abbreviation for, so people might not know what word your referring to.
How might you identify a drug addicted baby?
you might identify a drug adicted baby by the way the mother has looked after herself while the baby was inside her.
What is a TV series pilot?
It's the sample episode made so the network can decide whether to buy it or not. If bought it usually becomes the first episode of the series. Though sometimes it might be reshot if there is a casting change.
What is small sample size?
One is a small sample size, but that's just my answer, you might want to ask more people.
Who might use aseptic technique?
microbiologist,biologist and everyone that need to get a clean sample(prevent adding bacteria to the sample).
