The picture below represents an atom of the element nitrogen,

1.) Frequency measures the amount of waves that pass a specific point per second.

belka [17]

1.) is a 2.) is probably B. and 3.) is most likely a

5 0

3 years ago

Why is it bad to litter?

lesya692 [45]

It is bad to litter because that is harming the environment. When you throw out a can, it can harm a animal or several animals. Litter can also sink into the ground (I think) and harm the plants growing.

6 0

3 years ago

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All of the following are examples of destiny dependent limiting factors except

Triss [41]

Hurricanes are not an example of density dependent limiting factors!

5 0

4 years ago

Solid sodium reacts with liquid water to form hydrogen gas according to the equation 2 Na(s) + 2 H₂O(l) → 2 NaOH(aq) + H₂(g) Wha

lana66690 [7]

Answer: 21850.42mmHg or 28.78atm

Explanation: From the equation of the reaction, 2 moles of sodium reacts with 2 moles of water to produce 2 moles of NaoH and 1 mole of hydrogen gas at s.t.p.

molar volume of gas at s.t.p. = 22.4dm^3,

standard temperature = 0°C or 273K,

standard pressure = 760mmHg or 1atm,

molar mass of Na = 23g;

volume of the container= 20L or 20dm^3

From the equation, 2 moles or 46g of Na produces i mole or 22.4 dm^3 of hydrogen.

Therefore, 1kg or 1000g of Na will produce 22.4 * 1000/(46)= 486dm^3 of hydrogen.

To find the pressure of the gas produced, the formula P1V1/T1 = P2V2/T2

P1= 760mmHg, T1= 273K, V1 (initial volume of gas)= 486dm^3, T2=50.0°C or 50+273K= 323K, V2( final volume of gas= volume of vessel)=20dm^3 P2=?

P1= P1V1*T2/(V2T1)= 760mmHg * 323/(273)= 21850.42mmHg or 1atm*21850.42/760= 28.78atm

5 0

3 years ago

Igg possesses _______ binding sites for antigen, and the t-cell receptor possesses _______ binding sites for antigen:

tankabanditka [31]

Igg possesses <u>2</u> binding sites for antigen, and the t-cell receptor possesses <u>1</u> binding sites for antigen.

Known as immunoglobulin G, It is an antibody of some sort.
Your immune system produces antibodies, which are proteins, to combat pathogens.
Your cerebrospinal fluid's levels of IgG are measured using a CSF IgG index.
Normally, your cerebrospinal fluid contains very little IgG.

<h3>What is the role played by IgG in the body?</h3>

IgG is typically the most prevalent antibody in blood.
It guards against infections.
Therefore, infections are more likely to affect those with IgG deficiencies.
Your body produces unique proteins known as immunoglobulins or antibodies when it senses an attack.

<h3>When IgG is positive, what happens?</h3>

The presence of IgG indicates that the infection occurred several weeks to months ago.
Additionally, it implies that you might no longer be contagious.
IgG suggests that you might have some viral immunity, though you might not.

To learn more about IgG visit:

brainly.com/question/15280466

#SPJ4

7 0

2 years ago