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3 years ago

Is baking a cake a chemical reaction? What is the chemical formula? Please help

1 answer:

5 0

Baking a cake is a chemical reaction due to heat helps baking powder produce tiny bubbles of gas, which makes the cake light and fluffy. Heat also causes protein from an egg to change and make it firm.

Baking powder being CO2

NaHCO3 + NaHC4H4O4 ===> Na2C4H4O4 + CO2(g) + H2O

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The base protonation constant Kb of allantoin (C4H4N3O3NH2) is ×9.1210−6. Calculate the pH of a 1.1M solution of allantoin at 25

larisa [96]

Answer:

pH= 11.5

Explanation:

To the calculation of the pH value, we need to write the ionization equation first. Then using the ICE table and the information given by the problem we can set up the problem:

$C_4H_4N_3O_3NH_2~+~H_2O->C_4H_4N_3O_3NH_3^+~+~OH^-$

I 1.1 M Zero Zero

C -X +X +X

E 1.1-X X X

As next step, using the equilibrium expression for Kb we can replace the terms find in the ICE table and then solve for X, so:

$Kb=\frac{[C_4H_4N_2O_3NH_3^+][OH^-]}{[C_4H_4N_3O_3NH_2]}$

$9.2x10^-^6=\frac{[X][X]}{[1.1-X]}$

$9.2x10^-^6=\frac{X^2}{1.1-X}$

$(9.2x10^-^6)*[1.1-X]=X^2$

$1.01x10^-^5~-9.2x10^-^6X-X^2=0$

$X=0.003173$

With the value of X we can find the pOH (lets remember that X is the concentration of OH-), so:

$pOH=-Log(0.003173)$

$pOH=2.50$

Finally, we can find the pH value with the equation:

$14~=~pH~+~pOH$

$14~=~2.5~+~pOH$

$pH=14-2.5$

$pH=11.5$

The 1.1 M allantoin solution have a pH value of 11.5

4 0

3 years ago

If the block were to be cut in half, what would be the density of the smaller block?

anyanavicka [17]

Answer:

Density stays the same

Explanation:

The density remains the same because cutting the object in half will divide the mass & volume by the same amount. Also, the density of a substance remains the same no matter what size it is.

6 0

3 years ago

Which pair of elements has the most similar Lewis structures?

jonny [76]

Answer: C.)

Explanation:

8 0

2 years ago

Which factor increases the amount of water runoff?

bekas [8.4K]

D. impermeable rocks

Explanation:

Impermeable rocks is the factor among the give choices that will increase the amount of water runoff on the surface.

Surface run-off is liquid water that flows and moves on the earth surface.

An impermeable rock is a rock that lacks porosity and permeability.
Porosity is the amount or percentage of void spaces in rock.
Permeability is the inter-connectivity of the pores.
When a rock is impermeable, it will not allow water to infiltrate.

learn more:

Biogeochemical cycle brainly.com/question/3509510

#learnwithBrainly

7 0

3 years ago

What makes nitric oxide unique among neurotransmitters? Select one: a. It is an organelle. b. It is released before the actio

kaheart [24]

Answer: It is a gas

Explanation:

The most unique thing about nitric oxide being a neurotransmitter is that it is the only neurotransmitter which is in gaseous form.

Nitric oxide is small gaseous molecules which is synthesized by the de novo process in the neuronal tissue.

It can diffuse by plasma membrane.

It diffuses out of the postsynaptic neurons and acts on the neighboring neurons and presynaptic terminals to assist the generation of the Long Term potentiation.

5 0

3 years ago