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.

You might be interested in

The standard molar enthalpy of formation of NH3(g) is -45.9 kJ/mol. What is the enthalpy change if 9.51 g N2(g) and 1.96 g H2(g)

Vladimir [108]

Answer:

$\Delta H=-29.7kJ$

Explanation:

Hello!

In this case, since the undergoing chemical reaction is:

$N_2+3H_2\rightarrow 2NH_3$

We first need to identify the limiting reactant given the masses of nitrogen and hydrogen:

$n_{NH_3}^{by\ H_2}=1.96gH_2*\frac{1molH_2}{2.02gH_2}*\frac{2molNH_3}{3molH_2}=0.647molNH_3\\\\ n_{NH_3}^{by\ N_2}=9.51gN_2*\frac{1molN_2}{28.02gN_2}*\frac{2molNH_3}{1molN_2}=0.679molNH_3$

It means that only 0.647 moles of ammonia are yielded, so the resulting enthalpy change is:

$\Delta H=0.647molNH_3*\frac{-45.9kJ}{1molNH_3}\\\\ \Delta H=-29.7kJ$

Best regards!

3 0

3 years ago

How do we use particle theory to explain physical properties of matter??<br>thank you!!

olchik [2.2K]

The properties of matter can best be explained using a model in which all materials are composed of tiny particles (atoms, molecules and ions). There is empty space between particles and particles are constantly moving (their speed is changed by temperature).

8 0

3 years ago

A picture of a patient’s lung showed it to be shriveled and darker than usual.

Strike441 [17]

Answer:

Smoking

Explanation:

It has been proven time and time again to ruin lungs, effectively shortenning ones lifespan.

3 0

3 years ago

Read 2 more answers

What happens to water when it freezes?