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3 years ago

Read the following hypothesis about why a chicken bone becomes bendy after being soaked in vinegar:

Chemistry

2 answers:

USPshnik [31]3 years ago

8 0

Answer:

Explanation:

got it right on the quiz

Studentka2010 [4]3 years ago

5 0

Answer:

B. observing that a bone placed in a beaker of acid becomes bendy

Explanation:

The hypothesis suggests that when chicken bones are placed in vinegar, they become bendy due to the loss of calcium in their bones.

Calcium is identified as the ossifying material that strengthens the bone. When the acid that makes up the vinegar comes in contact with it, calcium is removed from the bone.

Now we know that calcium has capabilities of reacting with acids.

This suggests that if we also place the bone in an acid, they will bend due to reaction of calcium in the bones with the acid.

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Changes in a species over long periods of time are called

boyakko [2]

These are known as adaptions which causes evolution

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3 years ago

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Which element shares the most characteristics with carbon (C)?

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The answer to this would be Silicon!

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4 years ago

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Calculate the frequency of a wave with a wavelength of 8.00x10 m. In what region of the electromagneti spectrum is this?

zheka24 [161]

<em>The frequency of the wave with a wavelength of is</em> <u>3.748 × 10 ⁶ /s</u>.

I attached the working and the answer to the question below. I hope I was able to help.

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3 years ago

How many grams of ethanol, CH3CH2OH, should you dissolve in water to make 0.800 L of vodka (which is an aqueous solution that is

Rashid [163]

Answer:

252.5g

Explanation:

Given parameters:

Volume of vodka = 0.8L

Molarity of ethanol = 6.86M

Unknown:

Mass of ethanol = ?

Solution:

Molarity is one of the ways of expressing concentration. It is the number of moles of a substance in a solution.

Since Vodka = ethanol + water = solution

Molarity = $\frac{number of moles of ethanol}{Volume of solution}$

Number of moles of ethanol = molarity of vodka x volume of solution

Once we obtain the number of moles, we can derive the mass of the ethanol;

Number of moles = 6.86M x 0.8L = 5.49moles

Mass of ethanol = number of moles x molar mass

molar mass of ethanol = 12 + 3(1) + 12 + 2(1) + 16 + 1 = 46g/mol

Mass of ethanol = 5.49 x 46 = 252.5g

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4 years ago

Which statement regarding water is true? Energy must be given off in order to break down the crystal lattice of ice to a liquid.

Vlada [557]

Answer: All of the statements (A-D) are false

Explanation: All of the given statements are wrong as Hydrogen bonds are weaker than the ionic and the covalent bonds.

Liquid water is more dense than the solid water.

When heat or temperature is provided to the system of the ice, not only covalent bonds are broken but also hydrogen bonds also get broke.

Energy must not be given off in order to break down the crytsal lattice of ice to a liquid. Infact in changing the phase of the water, energy is released.

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3 years ago