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# Chemistry

Bradly Buckridge

Lvl 9
2021-11-08 19:35:47
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Cards in this guide (33)
Why do meteors burn up in the earths atmosphere

because of weathering

What is the ideal gas constant

It is a universal constant used for all gases.

What is STP

STP stands for standard temperature and pressure. These standards have been set by the IUPAC. For STP conditions, the temperature is 237.15K and pressure is 1 bar.

What is the Ideal Gas Law

The Ideal Gas Law is the equation of state of a hypothetical ideal gas.

The state of an amount of gas is determined by its pressure, volume and temperature. The modern form of the equation is:

pV = nRT

where p is the absolute pressure of the gas; V is the volume; n is the amount of the substance; R is the gas constant; and T is the absolute temperature.

apex- a law describing the properties of a gas

PV = nRT
What is the partial pressure of a gas in a mixture of gases

The partial pressure is the pressure exerted by just one gas in the mixture.

What does the kinetic theory say about the kinetic energy present in solids

a

What is the best way to make a supersaturated solution

Heat the solution

What does not describe the process the wright brothers used to create the first airplane

The wright brothers figured out how to outfit the plane with wings that flapped, similar to birds' wings. - Apex- Chemistry Semester 2.

Which of these describes something that happens as a pilot gets close to the speed of sound

More drag is created because the molecules cannot "hear" the airplane coming.

When sound molecules stack up in front of the high speed flights what could happen

There's no such thing as "sound molecules".

What is the temperature of absolute zero on the Kelvin and Celsius scales

On the Kelvin scale, absolute zero is 0 degrees Kelvin.

On the Celsius scale, absolute zero is −273.15 degrees Celsius.

Which of these does not describe the wright brothers first attempts at flight

They mimicked the flight of birds.

What substance will break rather than bend

Ice will break rather then bend

What is a challenge that the engineer of a high-altitude airplane would need to consider

The airplane may succumb to the power of gravity as lift decreases at higher altitudes.

Which of these does not accurately describe the Wright brothers first airplane

it had wings that flapped similat to birds wings

What relationship does Charles law describe

The relationship between temperature and volume

As pilots get closer to the speed of sound

When pilots get closer to the speed of sound it gets harder for the plane to fly. It could also depend on the how the pilot flees.

Adding external protrusions to a wing such as fuel pods water tanks and missiles would be useful

In order to answer this you will have to give me more information. You will have to give me a question to answer.

What forms of the ideal gas law would you use to calculate the number of moles of gas

Probable you think to the law of Avogadro.

A concentration unit expressed in units of moles of solute per kilogram of solvent

This is called molality.

Supersonic flight can cause molecules on the surface of an airplane to break apart and chemically react what additional challenges to flight does this create

This causes alot of heat that the airplane must be shielded from

What is a phase diagram

a diagram showing the effects of temperature and pressure on phase

Increasing an airplane's speed or wing size does which of the following

Generates more lifting force

Bikers wear spandex clothing to make themselves more aerodynamic. Which of the following forces does this clothing counteract

Drag

Mary is biking downhill. she notcies that her shirt and hair begin to pull back on her and blow in the wind that she is creating as she moves faster. This wind is an example of which of the following

Friction

An airplane specifically designed to fly at high altitudes may have

an added tank

All airplanes have mass therefore what force pulls them toward the ground

gravity

Adding external protrusions to a wing (such as fuel pods water tanks and missiles) would

Increase drag and the amount of thrust needed to move the airplane (Apex)

What does An airplane attempting to fly higher than 300000 ft do

Begin to succumb to the power of gravity because of the decrease in lift

The hot expanding gases generated by the combustion reactions in the engines are

released through the back of the engine to propel it and the airplane foward

What is stp apex

1 atm :)

In supersonic flights molecules break apart and react chemically. safety features protects the plane

heat shield

Which of the following is an expression of Boyle's law

PV = constant (apex)

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