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Mr. Slade Chapter 10 Quiz
Terms in this set (18)
6.02 x 10^23
H₂, N₂, O₂, F₂, Cl₂, Br₂, I₂
Seven elements that normally exist as diatomic molecules
one atom or molecule of a substance
molar mass is to moles of a substance as atomic/molecular mass is to _________________
the smallest unit into which a substance can be broken down without a change incomposition, usually atoms, molecules, or ions
a term used to refer to the mass of a mole of any substance
the amount of a substance that contains 6.02 × 10^23 representative particles of that substance
mole of the element
The atomic mass of an element expressed in grams is the mass of a _______________
number of grams of each element in one mole of the compound. Then add the masses of the elements in the compound.
To calculate the molar mass of a compound, find the _____________
convert among these units
Knowing how the count, mass, and volume of an item relate to a common unit allows you to
count the number of representative particles in a substance
The mole allows chemists to _____________
standard temperature and pressure (STP)
the conditions under which the volume of a gas is usually measured; standard temperature is 0°C, and standard pressure is 101.3 kPa, or 1 atmosphere (atm)
equal volumes of gases at the same temperature and pressure contain equal numbers of particles
molar volume- 22.4L
the volume occupied by 1 mole of a gas at standard temperature and pressure
between the number of moles of gas and the volume of the gas at STP.
The molar volume is used to convert ______________
the mass of a substance and the moles of the substance.
Use the molar mass of an element or compound to convert between ______________
Gas molecules do vary in size, just like molecules of solids and liquids, but the particles in a gas are always so far apart that the change in volume of the molecules doesn't change the volume the gas occupies at STP.
Why does one mole of any gas occupy the same volume (22.4 L) at standard temperature and pressure?
the volume occupied by a mole of any gas at STP
the number or grams of an element that is numerically equal to the atomic mass of the element in amu
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