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Why does a milky white cloudy suspension formed when the food sample tested positive for fat?
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How are electrons removed from atoms to form ions in a mass spectrometer?
The vaporised sample passes into the ionisation chamber. The electrically heated metal coil gives off electrons which are attracted to the electron trap which is a positively charged plate. The particles in the sample (atoms or molecules) are therefore bombarded with a stream of electrons, and some of the collisions are energetic enough to knock one or more electrons out of the sample particles to make positive ions. Most of the positive ions formed will carry a charge of +1 because it is much more difficult to remove further electrons from an already positive ion. These positive ions are persuaded out into the rest of the machine by the ion repeller which is another metal plate carrying a slight positive charge.
How can you use a light beam to identify a solution from a suspension?
Because of the different properties of solutions and suspensions, a beam of light can be used to differentiate the two. If a beam of light passes through the sample, it is a solution, not a suspension. Conversely, if a beam of light does not pass through a sample completely, it is a suspension, not a solution.
The origins of the mineral sample were?
The origins of most mineral samples were terrestrial. This means that they were naturally formed on Earth, and were not extra-terrestrial.
What info would you need to know about a sample of air before you could classify the sample as a solution suspension or colloid?
You would need to know the size of it's largest particle. I had this same question for my science class yesterday. Sad for me because I had to answer it. Good for me because I knew the answer. Good luck!
Why is a sample of magnesium fluoride have a strong attraction for each other?
The bond in magnesium fluoride is ionic.
Why is your blood sample cloudy or milky?
high triglycerides
How can you test food for fat?
For liquidsAdd 2cm(cube) of ethanol to a few drops of the unknown substance in a test tubeShake wellAdd 2cm(cube) of water to the test tubeA Positive result will result in a cloudy white suspension forming at the top of the solution.For solidsCut sample into a few pieces and place them in a test tubeAdd 2cm(cube) of ethanol and shake it thoroughly.Allow solid to settle and decant ethanol into another test tubeAdd 2 cm(cube) of water to the new test tubeA Positive result will result in a cloudy white suspension forming at the top of the solution.
Sample of suspension except milk?
Flour in water
What information would you need to know about a sample of air before you classify the sample as a solution suspension or a colloid?
the size of its largest particle
Can the sample mean in statistics be either positive or negative?
It can have either a negative or positive trend
How can the presence of urea be determined in urine?
add phenophtalein to the urine sample....... if the result is white cloudy ppt. it containes urea.....
Is a diluted urine sample the same as a positive test?
sometimes!
I tested positive for a urine test will same sample test positive 19 days later?
Split sample drug test? It depends.If what you're asking is, "I was positive because I was doing drugs; are the drugs going to leave my sample after 19 days?" the answer is that you'll still be positive. They freeze the second part of your sample, so there's no way anything could get out of it--and the drug metabolites in the sample wouldn't leave the sample anyway.If, OTOH, you're asking "I got a false positive for grass because I was taking ibuprofen (Advil is famous for crossreacting with THC on dip-stick tests, which is one of the reasons I hate dip-stick tests); should I have the second sample tested?" go for it. If they test the second sample on GC/MS, which is the normal way for split-sample tests, it will be able to tell the difference between Advil and weed.
Sample of a suspension chemistry?
Milk. In milk, the proteins are too large to dissolve. They are actually suspended within the solution.
If a sample dissolves in mineral oil but not water what is the test positive for?
lipids
If your first urine samle was positive can a split urine sample come up negative?
It depends on how the first sample was tested. If the first half was tested on a dipstick test and you KNOW you haven't been doing drugs--say, you're taking naproxen sodium for knee pain and you come up positive for marijuana (naproxen cross-reacts with the THC test), testing the split sample with GC/MS should clear you. OTOH, if you smoke weed and your first sample came up positive on GC/MS, assume the split sample will also be positive.
How are electrons removed from atoms to form ions in a mass spectrometer?
The vaporised sample passes into the ionisation chamber. The electrically heated metal coil gives off electrons which are attracted to the electron trap which is a positively charged plate. The particles in the sample (atoms or molecules) are therefore bombarded with a stream of electrons, and some of the collisions are energetic enough to knock one or more electrons out of the sample particles to make positive ions. Most of the positive ions formed will carry a charge of +1 because it is much more difficult to remove further electrons from an already positive ion. These positive ions are persuaded out into the rest of the machine by the ion repeller which is another metal plate carrying a slight positive charge.
