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3 years ago

THIS IS A SCIENCE QUESTION

Chemistry

2 answers:

Viktor [21]3 years ago

5 0

Answer:

Explanation:

Think of it like an hot air balloon

Hot air makes it rise and cool air sinks it downwards

MissTica3 years ago

4 0

Answer:

Explanation:

Hot air is less dense therefore it rises. Cold air is more closely packed therefore it is more dense. Less dense things rise while more dense things sink.

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The vitamin A molecule has the formula C20H30O, and a molecule of vitamin A2 has the formula C20H28O. Deter- mine how many moles

natta225 [31]

Answer:

1.04 moles of vitamin A2 contain the same number of atoms as 1.000 mol vitamin A

Explanation:

Step 1: Data given

Vitamin A = C20H30O

Vitamin A2 = C20H28O

Step 2: Determine the atoms in vitamin A

Vitamin A has 20 C atoms and 30 H atoms and 1 O-atom

In total we have 51 atoms in vitamin A

Step 3: Calculate numbers of atom in 1 mol

1 mol contains 6.022 * 10^23

For 51 atoms = 51 * 6.022*10^23 = 306 *10^23

Step 4: Determine atoms in vitamin A2

Vitamin A2 has 20 C atoms and 28 H atoms and 1 O-atom

In total we have 49 atoms in vitamin A2

Step 5: Calculate molecules A2

Molecules A2 = 306 *10^23 / 49

molecules A2 = 6.24*10^23

Step 6: Calculate how many moles of vitamin A2 contain the same number of atoms as 1.000 mol vitamin A.

n = 6.24*10^23 / 6.022*10^23 = 1.04 mol

1.04 moles of vitamin A2 contain the same number of atoms as 1.000 mol vitamin A

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3 years ago

Draw two amino acids – note the amino group, the carboxyl group and the alpha carbon, circle the water molecule to be removed an

larisa86 [58]

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2) Histidine (Blue)

The Carboxylic Groups are encircled in Yellow Sphere.

The Amino Groups are encircled in Orange Spheres.

The Alpha carbons are encircled in Pink spheres.

The water molecule evolved is in corresponding colors of its parent molecules.

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3 years ago

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jekas [21]

Answer: Kr 4d10 5s2

Explanation:

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MArishka [77]

Answer:

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Explanation:

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