# chemistry

• Created by: j.leigh12
• Created on: 26-03-18 16:53
How do you cnvert cm3 into dm3?
You divde by 1000 . So 1 cm3 is equal to 0.001dm3.
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What are volume and concentration measured it?
Volume: cm3, ml3, dm3 concentration: mol/dm3
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How do you find relative molar mass?
You first have to determine the atomic structure of the molecule. Then you must refer to a peiodic table. Multiply the mass of the element by how many of them there are, then finally add them all together.
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What is the equation for finding the concentration of a solution?
Number of moles divided by the volume (in dm3) (Units = mol/dm3)
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How do you figure out how many moles are in a substance?
given the mass of the substance that you are investigating and the molecular/ atomic structure of it, you can figure out the number of moles by dividing mass of the substance by the molar mass as the molar mass of a substance is equal to one mole.
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6.02x 10^23 this is how many atoms are in a single mole of any substanc.
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what do all gases have in common at room temp and pressure with the same number of moles?
They will all occupy the same space.
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How do you calculate atom economy?
Relative formula mass of desired product divided by the relative formula mass of all reactants.
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How do you calculate percentage yeild?
mass of product made (in g) divided by the maximum theoretical mass of product (in g)
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Reasons for a reaction to not have a percentage yeild of 100%?
Reactants could be partially lost during transferance. ther could be multiple products and some of the reactants might not react.
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## Other cards in this set

### Card 2

#### Front

What are volume and concentration measured it?

#### Back

Volume: cm3, ml3, dm3 concentration: mol/dm3

### Card 3

#### Front

How do you find relative molar mass?

### Card 4

#### Front

What is the equation for finding the concentration of a solution?

### Card 5

#### Front

How do you figure out how many moles are in a substance?