Caroline decided to investigate the digestion of starch in the mouth. she smashed up a cracker and placed equal amounts of it in each test tube in Group A (see illustration below). she then smashed up a second cracker while thoroughly mixing it with saliva, then placed equal amounts of the cracker-saliva mixture in each test tube in group B. Next, she poured equal amounts of Benedict's solution into each test tube in both groups. Benedict's solution is a blue chemical that, when heated, changes color to yellow when simple sugars are present. It does not change color in the presence of starch or other substances. Finally, Caroline heated all of the test tubes for one minute and observed the results.

which organic molecule does Benedict's solution identify?
(A) fats
(B) monosaccharides
(C) starch
(D) protein

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

nacl or sodium chloride is an ionic compound. this is because an ionic compound pertains to a compound that consists of positively and negatively charged ions. in this case, na (sodium) has a tendency to lose one electron when it reacts with with other atoms, so the resulting sodium ion contains 11 protons and 10 electrons, thus making it positively charged (na+), when chlorine reacts, it usually gains one electron to form an ion called chloride, thus making it negatively charged ( since the ions are oppositely charged, they attract.

o conteúdo de calor de um sistema é igual à entalpia apenas para um sistema que é constante