CHEMISTRY HIGH SCHOOL

Why does air with higher amounts of water vapor have a lighter density?

Answers

Answer 1

Answer:

Answer:

moist air is less dense than dry air because water has a lower molecular weight than nitrogen and oxygen

Answer 2

Answer:

Answer:

Water vapor is a relatively light gas when compared to diatomic Oxygen and diatomic Nitrogen. Thus, when water vapor increases, the amount of Oxygen and Nitrogen decrease per unit volume and thus density decreases because mass is decreasing.

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The components of a longitudinal wave include __________.a. rarefaction only
b. compression only
c. compression and rarefaction
d. compression, rarefaction, and triangulation

Answers

The correct answer to the question that is stated above is letter C.compression and rarefaction

Longitudinal wave has two features which include:
A compression-- the part of the wave which is pressed together.
A rarefaction-- the part of the wave that is the most spread apart.

What is the volume of a tank of nitrogen if it contains 17 moles of nitrogen at 34 C under 12,000 Pa?

Answers

Answer: 3571 L

Explanation:

According to the ideal gas equation:'

$PV=nRT$

P = Pressure of the gas = 12000 Pa = 0.12 atm $1Pa=9.9* 10^(-6)atm$

V= Volume of the gas = volume of tank = ?

T= Temperature of the gas = 34°C = 307 K $0^0C=273K$

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas= 17

$V=(nRT)/(P)=(17* 0.0821* 307)/(0.12)=3571 L$

Therefore Volume of tank is 3571 Liters.

Help me with 23 fast

Answers

Answer:

a salt

Explanation:

compounds are made of molecules but we need to mention the type of compound formed.

Answer:

A salt

Because compounds are made of molecules but we need to mention the type of compound formed.

Molecules of 1-bromopropane and 2-bromopropane differ in(1) molecular formula(2) structural formula(3) number of carbon atoms per molecule(4) number of bromine atoms per molecule

Answers

Answer: (2) structural formula

Explanation:-

The compounds having similar molecular formula but different arrangement of atoms or groups in space are called isomers and the phenomenon is called as isomerism.

1-bromopropane and 2-bromopropane are position isomers which have same molecular formula but different position of the functional groups attached.

The chemical formula for both the compounds 1-bromopropane and 2-bromopropane is $CH_3CH_2CH_2Br$ . Thus both have same molecular formula , 3 carbon atoms per molecule and 1 bromine atom per molecule.

What type of chemical reaction is happening here? 8Fe + S8 --> 8FeS

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This is a synthesis reaction since you are taking two elements and creating one (opposite of decomposition). I think this might also classify as a redox reaction as well since it appears as if iron is being oxidized and sulfur is being reduced (iron is loosing electrons while sulfur is gaining electrons).

I hope this helps. Let me know if anything is unclear.

Which element is a solid at STP?
A. H2
B. I2
C. N2
D. O2

Answers

An element which is solid at STP that is standard temperature and pressure is iodine.

What is an element?

An element is defined as a substance which cannot be broken down further into any other substance. Each element is made up of its own type of atom. Due to this reason all elements are different from one another.

Elements can be classified as metals and non-metals. Metals are shiny and conduct electricity and are all solids at room temperature except mercury. Non-metals do not conduct electricity and are mostly gases at room temperature except carbon and sulfur.

The number of protons in the nucleus is the defining property of an element and is related to the atomic number.All atoms with same atomic number are atoms of same element.Elements combine to form compounds.

Learn more about element,here:

brainly.com/question/14347616

#SPJ2

B. I2, di-Iodine, is solid at STP.

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if 1200 j of heat were absorbed by a 25 g block of iron, by how much would the temperature of the iron increase?

Q4. Oil rigs are used to drill for crude oil.a. Drill heads are made from steel. Steel is an alloy.Explain why Alloys are harder than pure metals.b. Drill heads also contain diamonds.Describe as fully as you can the structure and bonding in diamond.c. Polymers are produced from crude oil.Describe the structure and bonding in thermosoftening polymer and explain why thermosoftening polymers melt when heated.