Which of the following is NOT a characteristic of a strong acid?

True or False? Boiling a solution containing a protein will disrupt all secondary structure but not primary structure.

gtnhenbr [62]

Answer:

False

Explanation: The structure of denatured protein does not change.The primary structure is the same as the secondary or tertiary, hence the non-polar groups are disrupted at high temperatures.

5 0

3 years ago

If the amplitude of ocean waves increases by a factor of 1.1, by how much does the energy increase?

klasskru [66]

Answer:

The energy increases by a factor of 1.2.

Explanation:

The energy (E) of an ocean wave is directly proportional to the square of its amplitude (A).

E ∝ A² or E = kA²

If you have two waves with amplitudes A₁ and A₂, then

$\frac{E_{2} }{E_{1} } = \frac{A_{2}^{2} }{A_{1}^{2} } = (\frac{A_{2} }{A_{1} }})^{2}$

If A₂ = 1.1A₁, then

$E_{2} = E_{1} \times (\frac{1.1A_{1} }{A_{1} })^{2} = (1.1)^{2} = 1.2$

The energy increases by a factor of 1.2.

6 0

3 years ago

A cube with edge = 1.00” of an unknown pure substance has a mas off 10.0 oz. what is the density of this substance in g/mL? In k

max2010maxim [7]

Answer 1) The density of the cube will be 17.30 g/mL

We know the edge that is 1 inch, we have to convert it into cc which will be;

1" = 16.38 cc and cc = mL

The given mass is in oz, we need to convert this as well in g;

10 oz = 283.495 g;

We have the formula as Mass = Density / Volume

Substituting the values; Density = (283.495 / 16.38) = 17.30 g/mL

So the density will be 17.30 g/mL

Answer 2) The density of cube will be 1.738 Kg/L

The same procedure of conversion would be done here,

Mass in Kg will be 0.02834 Kg and Volume will be 0.0163 L

On solving with the equation as Mass = Density / Volume;

Density = (0.02834 / 0.0163) = 1.738 Kg/L

Hence, the density will be 1.738 Kg/L

3 0

3 years ago

Using the following standard reduction potentials, Fe3+(aq) + e- → Fe2+(aq) E° = +0.77 V Ni2+(aq) + 2 e- → Ni(s) E° = -0.23 V ca

lina2011 [118]

Answer: The above reaction is non-spontaneous.

Explanation:

For the given chemical reaction:

$Ni^{2+}(aq.)+2Fe^{2+}(aq.)\rightarrow 2Fe^{3+}(aq.)+Ni(s)$

Here, nickel is getting reduced because it is gaining electrons and iron is getting oxidized because it is loosing electrons.

We know that:

$E^o_{(Fe^{3+}/Fe^{2+})}=0.77V\\E^o_{(Ni^{2+}/Ni)}=-0.23V$

Substance getting oxidized always act as anode and the one getting reduced always act as cathode.

To calculate the $E^o_{cell}$ of the reaction, we use the equation:

$E^o_{cell}=E^o_{cathode}-E^o_{anode}$

$E^o_{cell}=-0.23-0.77=-1.0V$

Relationship between standard Gibbs free energy and standard electrode potential follows:

$\Delta G^o=-nFE^o_{cell}$

As, the standard electrode potential of the cell is coming out to be negative for the above cell. Thus, the standard Gibbs free energy change of the reaction will become positive making the reaction non-spontaneous.

Hence, the above reaction is non-spontaneous.

3 0

3 years ago

Remodeling a kitchen to add additional cabinets to existing ones also means adding extra support. In a similar respect, bone rem

krok68 [10]

Answer:

Calcium (Ca²⁺)

Explanation:

Calcium is very important mineral, found in teeth and bones primarily.

It is needed for the strong bones.

It is very important to maintain the bones in order to support our skeleton.

In our body it is also important to carry out other functions like in muscles, nerve function and also for heart.

If our diet is not full of calcium, the calcium deficiency may occur which leads to the weakening of bones and cause fracture.

The dietary source of calcium includes:

Yogurt, cheese, milk

beans such as peas, peanuts.

fishes

almonds, oranges, molasses

5 0

3 years ago