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Aneli [31]
2 years ago
12

In what form does the sun's energy arrive on Earth?The physical characteristics of two large predatory animal species are shown

in the table below.
Physical Characteristics
Species Characteristics
X Short canine teeth, small prey size
Y 1-foot-long canine teeth, large prey size
Which species will most likely survive if the prey population in the area decreases?

Species X because it is difficult to bring down a small prey
Species X because short canines are less likely to break
Species Y because long canines are less likely to break
Species Y because it is easy to bring down a large prey
Chemistry
1 answer:
eimsori [14]2 years ago
6 0

Answer:

radiation B species x because short canines are less likely to break.

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What is the formula for number of moles?​
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number of moles=volume/molar volume or mass/molar mass

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Can matter undergo chemical reactions but still keep the same physical properties?
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Phosphorous would gain or lose electrons?
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4 0
3 years ago
Epinephrine (adrenaline) is a hormone secreted into the bloodstream in times of stress. It contains 59.0% C, 7.15% H, 26.20% O,
vichka [17]

Answer:

C9H13O3N

Explanation:

Take the atomic mass of C=12.0, H=1.0, O=16.0 and N=14.0.

We can draw a chart (please view this on desktop so to avoid spacing errors):

Let the mass of Epinephrine be 100g.

                             C                       H                          O                              N

mass(g) :              59                      7.15                    26.2                         7.65

no. of moles : 59/12 =4.9167     7.15/1 = 7.15     26.2/16=1.6375 7.65/14=0.5464

(n.o.m. = mass/molar mass)

Ratio:   4.9167/0.5464 =9    7.15/0.5464=13      1.6375= 3      0.5464/0.5464 =1

(divide the n.o.m. by the smallest n.o.m., which is 0.5464 in this case, take the whole numbers)

So, the empirical formula will be: C9H13O3N

But this is still not yet the molecular formula. We have to ensure the molar mass is 183g/mol. Multiply the empirical formula by n.

So, let the molecular formula of Epinephrine be (C9H13O3N)n.

12x9n + 1x13n + 16x3n + 14n = 183

108n + 13n + 48n + 14n = 183

183 n = 183.

n = 1

Hence, the molecular formula is C9H13O3N.

3 0
3 years ago
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