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Chemistry

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Jeffry Ortiz

Lvl 10
2y ago
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Cards in this guide (16)
What are the functions of electromagnetic energy

by kentic energy by kentic energy

Why are aircraft fuel tanks designed to be located in the wing

To utilize the wing space for the fuel,

What is the molality of .630g of NaCl dissolved in 525g of water

0.630 g NaCl x (1 mol NaCl/58.44 g NaCl) = 0.0108 mol NaCl

525 g H2O x (1 kg/1000g) = 0.525 kg H2O

0.0108 mol NaCl/0.525 kg H2O = 0.0206 molality

What is R in the ideal gas law equation

the ideal gas constant

D:

What forces hold network solids together

All chemical bonds, including those found in network solids, derive from the electromagnetic force. Positively charged protons attract negatively charged electrons. Although atoms start off with an equal number of protons and electrons, and are therefore electrically neutral, the electrons rearrange themselves in ways that create attractions between atoms. Covalent bonds

What relationship does Charles's law describe

The relationship between temperature and volume

Which intermolecular force would affect the boiling point the least

Van der Waals forces

What force is activated because of the mass of the airplane and works to pull an airplane to the ground

Gravity

Which of these best describes a flight that is approaching the speed of sound

more drag is created because the air molecules are not moving out of the way of the airplane

What does Dalton's Law of Partial Pressures say

The total pressure of a gas mixture is the sum of the individual pressures.

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

This is called molality.

What is the overall effect adding a solute to a solution

boiling point is increased and freezing point is decreased

Which molecular solid would have the highest melting point

A solid that has hydrogen bonding would melt the easiest.

What is a homogeneous mixture equivalent to

A homogeneous mixture has only one phase.

What will result from increasing the temperature of gas

Increasing the temperature of gas the volume increase.

Which of the following is an electrolyte solution

The answer is "Ions in water" on Apex

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