CHEMISTRY HIGH SCHOOL

Where would sound travel the slowest?Question 3 options:

At the equator


At the North Pole


In New York City


In the pine forests of Georgia

Answers

Answer 1
Answer:

Answer: In New York City

Explanation: I'm not a nerd but I think it would be that because when your in the middle of new York city, and you scream it echos.
Answer 2
Answer:

Answer:

I believe it’s 4

Explanation:

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Which statement describes a chemical property of the element magnesium?(1) Magnesium is malleable.
(2) Magnesium conducts electricity.
(3) Magnesium reacts with an acid.
(4) Magnesium has a high boiling point.

Answers

Answer: option 3) magnesioum reacts with an acid.


Justification:


1) Malleability, conduction of electricity, and boiling point are physical properties.


2) Maleability is the ability to be transformed into foil. It is just a change in form. So, it is a physical property.


3) The metals conduct electricity in virtue of the array of the atoms, which permtis the flow of the electrons, but it does not involve a chemical change, so it remains being a physical proerty.


4) Boling point is the temperature at which a substance passes from liquid state to gas state, which are just different forms of the same substance. So, it is other physical property.


5) Reaction with an acid is indeed a chemical transformation: the metal (magnessium) will form a chemical bond with some spieces of the acid to form a new compound. This is a chemical reaction in virtue of the chemcial properties of the substance (its ability to react with acids)

Magnesium reacts with an acid.

Can someone help me find the theoretical value of methane? It is chemistry

Answers


Methane is lighter than air, having a specific gravity of 0.554. It is only slightly soluble in water. It burns readily in air, forming carbon dioxideand water vapour; the flame is pale, slightly luminous, and very hot.The boiling point of methane is −162 °C (−259.6 °F) and the meltingpoint is −182.5 °C (−296.5 °F). Methane in general is very stable, butmixtures of methane and air, with the methane content between 5 and 14percent by volume, are explosive. Explosions of such mixtures have beenfrequent in coal mines and collieries and have been the cause of manymine disasters.

a teacher describes a mathematical system that can be used to convert the weight of water to the mass of water

Answers

To describe a mathematical system that converts weight of water to mass equivalent, the teacher must use the idea of acceleration of gravity. Mass is the amount of matter composed in a substance. Weight is affected by the pull of gravity. Weight is mass multiplied by acceleration of gravity. Gravity acceleration is equal to 9.81 m/s2. So to convert weight to mass, divide the weight by 9.81 m/s2 simply.

Which intrusive feature may start as a sill but, as more magma builds, it pushes upward like a lens

Answers

An intrusive feature that starts as a sill, but build up with magma into a lens-like structure is a batholith. A batholith is composed of igneous rocks due to the hardened magma from the Earth's crust. The opposite of sill, dike, builds up to form a laccolith, another intrusive feature with a mushroom-like structure.

if you have 3.50 moles of hydrogen and 5.00moles of nitrogen to produce ammonia, witch element is the reactant in excess? 3H2+N2=2NH3

Answers

Given 3.50 moles of hydrogen and 5.00 moles of nitrogen to produce ammonia, nitrogen is the excess reactant.

What is the excess reactant?

The excess reactant is the reactant in a chemical reaction with a greater amount than necessary to react completely with the limiting reactant.

  • Step 1: Write the balanced equation.

3 H₂ + N₂ ⇒ 2 NH₃

  • Step 2: Establish the theoretical ratio.

The theoretical ratio (TR) of H₂ to N₂ is 3:1.

  • Step 3: Establish the experimental ratio.

The experimental ratio (ER) of H₂ to N₂ is 3.50:5.00 = 0.70:1.

  • Step 4: Determine the excess reactant.

Comparing TR and ER, we can realize that there is not enough hydrogen to react with the nitrogen. Thus, nitrogen is the excess reactant.

Given 3.50 moles of hydrogen and 5.00 moles of nitrogen to produce ammonia, nitrogen is the excess reactant.

Learn more about excess reactant here: brainly.com/question/17199947

Answer : The N_2 element is the reactant in excess.

Solution :  Given,

Moles of N_2 = 5 moles

Moles of H_2 = 3.50 moles

The balanced chemical reaction is,

3H_2(g)+N_2(g)\rightarrow 2NH_3(g)

From the balanced reaction we conclude that

As, 3 moles of H_2 react with 1 mole of N_2

So, 3.5 moles of H_2 react with (3.5)/(3)=1.16 moles of N_2

The excess of N_2 = 5 - 1.16 = 3.84 moles

That means in the given balanced reaction, H_2 is a limiting reagent because it limits the formation of products and N_2 is an excess reagent.

Hence, the N_2 element is the reactant in excess.

Which reaction occurs spontaneously?(1) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq)
(2) Cl2(g) + 2NaF(aq)--> F2(g) + 2NaCl(aq)
(3) I2(s) + 2NaBr(aq)--> Br2(l) + 2NaI(aq)
(4) I2(s) + 2NaF(aq)--> F2(g) + 2NaI(aq)

Answers

The answer is: (1) Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq).

In this chemical reaction chlorine change oxidation number from 0 to -1 (reduction) and bromine change oxidation number from -1 to 0 (oxidation).

Chlorine is stronger oxidation reagent than bromine.

In VIIA or group 17 (halogen elements) there are six elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), astatine (At) and tennessin(Ts).

They have high electronegativity because they have seven valence electrons in their outermost energy level, so they can gain an electron to have the octet rule.  

Going down in the group, element are weaker oxidazing reagent and less reactive.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.
The reaction occurs spontaneously is Cl2(g) + 2NaBr(aq)-->Br2(l) + 2NaCl(aq). The answer is number 1. The rest of teh choices do not asnwer the question above.
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