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2 years ago

Need helpppppp ASAPPPPP Where does the mesosphere get its heat?

Chemistry

1 answer:

kvasek [131]2 years ago

6 0

Answer:

When objects from space (meteoroids, space shuttles) enter the atmosphere, they start heating up in the mesosphere.

Explanation:

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In the experiment, 40 mL of 3 M sodium hydroxide is used to extract the benzoic acid. In order to recover the benzoic acid from

nikdorinn [45]

Answer:

20 mL OF 6 M HYDROCHLORIC ACID WILL BE NEEDED

Explanation:

M1 V1 = M2 V2

M1 = Molarity of sodium hydroxide = 3 M

V1 = volume of sodium hydroxide = 40 mL

M2 = Molarity of hydrochloric acid = 6 M

V2 = Volume of hydrochloric acid = unknown

Rearranging the equation, we have:

V2 = M1 V1 / M2

V2 = 3 * 40 mL / 6

V2 = 120 / 6

V2 = 20 mL

To precipitate the benzoic acid by 6 M of hydrochloric acid, 20 mL volume will be needed.

6 0

3 years ago

The following steps refer to various stages in transmission at a chemical synapse. 1. Neurotransmitter binds with receptors asso

Furkat [3]

Answer:

3,2,5,1,4

Explanation:

A chemical synapse begins when an (3)action potential reaches the axon terminal depolarizing the membrane leading to the opening of the voltage-gated Na+ channels, this Na+ ions will then depolarize the presynaptic membrane, opening the voltage-gated Ca2+ channels. (2)Calcium ions then will initiate a cascade entering the neuron that will lead to the fusion of synaptic vesicles with the presynaptic membrane (5)causing the releasing of neurotransmitters into the synaptic cleft. (1)These neurotransmitter will diffuse across the synaptic place in order to bind to the receptors on the postsynaptic membrane, (4)particulary into the ligand-gated channels, opening them.

I hope you find this information useful and interesting! Good luck!

7 0

3 years ago

The energy of motion is called kinetic energy ? True or false

Ivahew [28]

Answer:

True

Explanation:

Trust me

4 0

2 years ago

Read 2 more answers

ASHA 777 [7]

Because the 4s orbital is at a lower energy level.

The 4s orbital has a lower energy because it is more penetrating than a 3d orbital. A 4s electron can get closer the nucleus than a 3d electron, so it has a lower potential energy.

The other options are incorrect because they contradict the correct one.

6 0

3 years ago

Describe how oxidation and reduction involve electrons, change oxidation numbers, and combine in oxidation reduction reactions

borishaifa [10]

Answer: Oxidation is defined as the reaction in which there is loss of electrons. It is accompanied by increase in oxidation number.

$Zn\rightarrow Zn^{2+}+2e^{-}$

Zinc in solid state has oxidation number of zero and on losing electrons changes to $Zn^{2+}$ with oxidation number of +2.

Reduction is defined as the reaction in which there is gain of electrons. It is accompanied by decrease in oxidation number.

$2H^++e^{-}\rightarrow H_2$

Hydrogen ions with +1 oxidation state gains electrons and converts to molecular hydrogen with oxidation state of zero.

In the given redox reaction, both oxidation and reduction takes place. They go hand in hand.

$Zn+H_2SO_4\rightarrow ZnSO_4 +H_2$

Zinc converts to $Zn^{2+}$ and gets oxidized. $H^+$ gains electron and convert to $H_2$ .

4 0

3 years ago