CHEMISTRY HIGH SCHOOL

Which element is a liquid at STP?
(1) argon (3) chlorine
(2) bromine (4) sulfur

Answers

Answer 1
Answer:

Answer: Option (2) is the correct answer.

Explanation:

STP means standard temperature and pressure.

At STP chlorine exists as a gas, sulfur exists as a solid and argon also exists as a gas.

Whereas bromine exists as a liquid at STP.

Thus, we can conclude that out of the given options bromine is the element which exists as a liquid at STP.
Answer 2
Answer:

The element that is a liquid at standard temperature and pressure (STP) is bromine (Br). Therefore, option 2 is correct.

Bromine is the only element among the options given that is a liquid at STP. It is a reddish-brown liquid with a strong and unpleasant odor. Bromine is a halogen and exists as diatomic molecules (Br₂).

It has a boiling point of 58.8°C (137.8°F) and a melting point of -7.2°C (19.0°F). Bromine is significantly more reactive than argon but less reactive than chlorine and sulfur.

Argon (Ar) is a noble gas and exists as a colorless and odorless gas at STP. Chlorine (Cl) is a greenish-yellow gas at STP. Sulfur (S) is a solid at STP and melts at a relatively high temperature.

To learn more about the element, follow the link:

brainly.com/question/31950312

#SPJ6

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Which statement best describes the pH of pure watera. It is neutral because the concentration of hydronium ions equals that of hydroxide ions
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Answers

A is correct. The balance creates H2O

Answer:

the answer is a. It is neutral because the concentration of hydronium ions equals that of hydroxide ions

Explanation:

(True or False) It would be most appropriate to use the noble gas core [He] when writing the shorthand electron configuration for sulfur.

Answers

The answer is false.
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What is the product when magnesium reacts with nitrogen? Mg(s) + N2(g) →

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A bond exists between A and B in the compound AB. A and B are sharing electrons. The type of bond is ____

Answers

Answer: Covalent

Explanation:

A covalent bond is formed when an element shares its valence electron with another element. This bond is formed between two non metals.  Example: H_2

An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element. This bond is formed between a metal and an non-metal. Example: NaCl

Thus bond formed by sharing of electrons is covalent bond.
They are covalent bonds.
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Ionic bonds transfer

The four basic blood types are:
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Answers

The four basic blood types are: A, B, AB and O.

Answer:

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What can you say about density if volume increase and mass stays the same

Answers

Density = mass
               volume 

For the sake of explanation, let's pretend the mass is 2g and the volume is 1 ml

Density = 2 g = 2 g/ml
              1 ml

Now if we increase the volume, and leave the mass the same then mass is still 2g, but we can increase the volume to 2 ml 

Density = 2 g   = 1 g/ml
               2 ml

Therefore we can say that if volume increases and mass stays the same, then density will decrease.
Well we know that density is equal to mass by volume, written scientifically as such:
ρ = m/v
Let's plug in some numbers to see how this looks, we'll say the object weighs 1 kg and it's volume is 2 cm^3
Thus, ρ = 1 kg / 2 cm^3
So, density in this case is equal to 1/2 kg for every cm^3.
Now let's increase the volume and keep the mass. We'll double the volume.
ρ = 1 kg / 4 cm^3
Now the density comes out to 1/4 kg for every cm^3, which is obviously less. 
We've come to the conclusion, then, that as volume increases and mass stays the same, density decreases. Therefore volume and density are inversely proportioned.

This makes sense mathematically, but does it make sense if we just think about it? It invariably does.
What is density? Density is just how much mass is stuck in a certain space. As such, when you increase that space, but keep the mass, the mass will be more sparsely distributed.
Think of it like this, you've a small room filled to the brim with toys, should you increase the room size, but keep the same amount of toys, then the toys would be further spread apart.
It is the same way with mass and volume.
Hope this helps :)
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