Match the following: Molecule Test 9. Carbohydrates A. Biuret test 10. Starch and glycogen B. Paper test 11. Lipids C. I2KI test 12. Proteins D. Benedict test 13. Nucleic acids E. None of the above

CarbohydratesBenedict test

Starch and glycogen I2KI test

ProteinsBiuret test

LipidsPaper test

Nucleic acidsNone of the above

Explanation:

Benedict's Test is can be used to detect simple carbohydrates. The Benedict's test can detect reducing sugars (monosaccharide's and some disaccharides), having free ketone or aldehyde functional groups.

The Biuret Test shows the presence of peptide bonds, which are the basis for proteins. These bonds makes the blue Biuret reagent turn purple. The rest is carried out by adding an equal amount of NaOH to a solution of the food, mix carefully and add a few drops of 1% CuSO4, without shaking the mixture.

Lipids form a translucent stain on paper while starch/glycogen turns I2/KI solution blue-black

odds are decent that your handwriting right now looks a little bit different than it did five years ago, and will look different again in five more. when i look back through my notebooks from middle school to now, i see a long, slow progression from meticulous and teeny letters to bigger, sloppier ones, plus a few side detours: sometime in high school, for example, i decided those loopy cursive lowercase f’s were just the coolest, adopting them as the lone rep for cursive in my otherwise all-print handwriting.

explanation:

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms