Determine the mass of 6.02 * 10^24 formula units of ZnCl2
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1.36 & 10^3 g
a. What mass of hydrogen chloride is made when 7.0g of hydrogen reacts with 142g of
Chlorine ?
b. What mass of hydrogen after the reaction ?
c. What mass of reactions remain after the reaction is complete ?
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, a. Cl2 is considered the limiting reagent. 146g of HCl is made... b. 146g -
142g Cl = 4g H
c. 146g - 142 g = 4g of H reacted; original mass of hydrogen = 7g... 7g - 4g =
3g of hydrogen remains.
Why use roasting and not smelting ?
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Many ores come as sulphide ores and not oxide ores. It's very easy to
convert a sulphide ore to an oxide ore (Fe2O3).After roasting, the product
is ready to be smelted.
What is the reaction called when HCl reacts with Ca(OH) ?
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Neutralization reaction
Smelting
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is a process by which pure metals can be extracted from their ores and
minerals through single displacement.
,Zn(s) + 2HCl(aq) --> H2(g) + ZnCl2(aq)
Which trial is the limiting reagent ? :
Trial 1 : 0.1g Zn (deflated) | Trial 2 : 0.2g Zn (max inflated) | Trial 3: 0.3g Zn | Trial 4: 0.4g
Zn
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Hydrochloric acid is revealed to be the limiting reagent in trial 2 and in
every trial after the first trial because the balloon inflates to its maximum
volume in trial 2.
Calculation involving the ratios of substances that participate in a reaction.
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Stoichiometry
Identify the limiting reagent when 73.28g of Iron(II) sulphide reacts with 45.85g of
Oxygen to produce Iron (III) oxide and sulfur dioxide.
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FeS in excess
O2 limiting reagent
, If 8.8g of carbon monoxide is produced when 2.4 g of carbon reacts, what mass of
oxygen is required ?
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6.4g
Determine how many molecules of CO2 are present if an industrial plant releases
4.557 * 10^3 moles into the atmosphere.
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2.74 * 10^27 molecules of CO2
Determine the mass of 2.50 mol of Potassium Chloride (KCL)
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186g
Calculate the final concentration of a hydrogen peroxide solution if water is added to
150mL of a 6.0% v/v hydrogen peroxide solution until the total volume is 250mL.
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1.36 & 10^3 g
a. What mass of hydrogen chloride is made when 7.0g of hydrogen reacts with 142g of
Chlorine ?
b. What mass of hydrogen after the reaction ?
c. What mass of reactions remain after the reaction is complete ?
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, a. Cl2 is considered the limiting reagent. 146g of HCl is made... b. 146g -
142g Cl = 4g H
c. 146g - 142 g = 4g of H reacted; original mass of hydrogen = 7g... 7g - 4g =
3g of hydrogen remains.
Why use roasting and not smelting ?
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Many ores come as sulphide ores and not oxide ores. It's very easy to
convert a sulphide ore to an oxide ore (Fe2O3).After roasting, the product
is ready to be smelted.
What is the reaction called when HCl reacts with Ca(OH) ?
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Neutralization reaction
Smelting
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is a process by which pure metals can be extracted from their ores and
minerals through single displacement.
,Zn(s) + 2HCl(aq) --> H2(g) + ZnCl2(aq)
Which trial is the limiting reagent ? :
Trial 1 : 0.1g Zn (deflated) | Trial 2 : 0.2g Zn (max inflated) | Trial 3: 0.3g Zn | Trial 4: 0.4g
Zn
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Hydrochloric acid is revealed to be the limiting reagent in trial 2 and in
every trial after the first trial because the balloon inflates to its maximum
volume in trial 2.
Calculation involving the ratios of substances that participate in a reaction.
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Stoichiometry
Identify the limiting reagent when 73.28g of Iron(II) sulphide reacts with 45.85g of
Oxygen to produce Iron (III) oxide and sulfur dioxide.
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FeS in excess
O2 limiting reagent
, If 8.8g of carbon monoxide is produced when 2.4 g of carbon reacts, what mass of
oxygen is required ?
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6.4g
Determine how many molecules of CO2 are present if an industrial plant releases
4.557 * 10^3 moles into the atmosphere.
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2.74 * 10^27 molecules of CO2
Determine the mass of 2.50 mol of Potassium Chloride (KCL)
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186g
Calculate the final concentration of a hydrogen peroxide solution if water is added to
150mL of a 6.0% v/v hydrogen peroxide solution until the total volume is 250mL.
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