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valentina_108 [34]
2 years ago
10

(picture is a pic of cute colorful birds c: ) Suppose that you and a friend see brightly colored pigeons like these at a nature

park. Because pigeons are usually gray and white, you both wonder where these colors came from. Suddenly, your friend says, "I have a theory. These birds must get their colors from eating food that has the same colors."
Is your friend's explanation a scientific theory? Give reasons to explain your answer.

Chemistry
2 answers:
ella [17]2 years ago
8 0

Answer:

It is most definitely not a scientific theory. When you eat, say, blueberries for example, do you turn blue? No. It has to do with their genetic makeup, so their parents must have been fun colors.

Explanation:

Anit [1.1K]2 years ago
8 0

Answer:

Well yes it is a scientific theory because he examined the birds and gave a hypothesis on why the birds are different colors, before we knew how birds really got their colors, this could actually have been a very good theory. Birds get their colors just because of genetics, we wouldn't know this unless someone made a theory, tested it, and reported it's accuracy.

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the chemical compound C2F4 is used to make PTEE (Teflon). How manyC2F4 molecules are in 485 kilograms of this material?
monitta

Answer:

molecules=2.92x10^{27}moleculesC_2F_4

Explanation:

Hello,

In this case, we use the Avogadro's number to compute the molecules of C2F4 whose molar mass is 100 g/mol contained in a 485-kg sample as shown below:

molecules=485kgC_2F_4*\frac{1000gC_2F_4}{1kgC_2F_4} *\frac{1molC_2F_4}{100gC_2F_4}*\frac{6.022x10^{23}molecules C_2F_4}{1molC_2F_4}  \\\\molecules=2.92x10^{27}moleculesC_2F_4

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5 0
3 years ago
2
Katyanochek1 [597]
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3 years ago
In preparation for a demonstration, your professor brings a 1.50−L bottle of sulfur dioxide into the lecture hall before class t
solmaris [256]

Answer:

4.81 moles

Explanation:

The total pressure of the gas = Pressure at which gauge reads zero + pressure read by it.

Pressure at which gauge reads zero = 14.7 psi

Pressure read by the gauge = 988 psi

Total pressure = 14.7 + 988 psi = 1002.7 psi

Also, P (psi) = P (atm) / 14.696

Pressure = 1002.7 / 14.696  = 68.2297 atm

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The conversion of T( °C) to T(K) is shown below:

T(K) = T( °C) + 273.15  

So,  

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Using ideal gas equation as:

PV=nRT

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P is the pressure

V is the volume

n is the number of moles

T is the temperature  

R is Gas constant having value = 0.0821 L.atm/K.mol

Applying the equation as:

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