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Q 1/61
Score 0
The atom economy of a reaction tells you how much of the mass of the reactants is wasted when manufacturing a chemical and how much ends up as a useful product.
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What is atom economy?
Q 2/61
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Relative formula of desired products / relative formula mass of all reactants * 100
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What is the formula of atom economy
61 questions
Q.
The atom economy of a reaction tells you how much of the mass of the reactants is wasted when manufacturing a chemical and how much ends up as a useful product.
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Relative formula of desired products / relative formula mass of all reactants * 100
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Let's you find the volumes needed for two solutions to react together. If you know the concentration of one of the equations you can use the volumes to find the other.
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Concentration (g/dm3) = mass of solute (g) / volume of solvent (dm3)
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Atomic mass * number of atoms of that element / mr of the compound * 100
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Volume of gas (dm3)= mass of gas (g) /mr of gas * 24
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Add all the relative formula mass
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The name given to an amount of substance. The mole of atoms or molecules of any substance will have a mass in grams equal to the relative formula mass for that substance
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The reaction stops, when all of one of the reactants is used up. Any other reactants are in excess. They're usually added in excess to make sure that the other reactants is used up. The reactant that's used up in a reaction is called the limiting reactant because it limits the amount of products that formed. The amount of product formed is directly proportional to the amount of limiting reactant. If you add more reactant, there will be more reactant particles to take part in the reaction, so more product particles.
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Number of moles = mass in g / mr of that elements
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g/dm3 /mr = mol/dm3
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The amount of substance in a certain volume of a solution. The more solute (the substance that's dissolved) there is a given volume, the more concentrated solution.
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The amount of product you get is known as yield. Compares what you should get (theoretical yield) with what you should in practice (actual yield)
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During a chemical reaction no atoms are destroyed or creates. This means that there are the same number and types of atoms on each side of a reaction. Mass is conserved
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As some products or reactant always get's lost along the way
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During a chemical reaction, no atoms are destroyed no atoms are created. Means the same number and types of atoms on each side. No mass is lost or gained, we say that mass is conserved
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Yield, rate of reaction, position of equilibrium for reversible reaction, reaction with low atom economy, that products useful by products
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profits + environments
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Write out the balanced equation
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If the mass seems to change, there usually is a gas involved. You might observe a change of mass in an unsealed reaction vessel.
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One of the products is gas. Before the reactions, all the reactants are contained in the reaction vessel. If the vessel isn't enclosed, then the gas can escape from the vessel as its formed. It's no longer contained in the vessel, you can't account for it's mass, the total mass of the stuff inside decreases
