02/02/21

mixed stoichiometry

How many moles of hydrogen carbonate need to decompose to produce 2.25 x 10^24 molecules of carbon dioxide if water is the only other product?
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02/02/21

mixed stoichiometry

How many moles of oxygen gas are required to completely combust 35.9g of methane gas (CH4).
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02/02/21

What volume (in mL) of 0.404 mol/L calcium hydroxide. Ca(OH)2 (aq), is needed to completely neutralize 78.4mL of 0.373 mol/L phosphoric acid, H3PO4 (aq)
Please don't forget to show your steps.
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01/26/21

Finding the percent yield of the reaction
I don't understand stand what I'm supposed to do with the equation and percent yieldUse the balanced equation2 Al + Fe2O3 --> Al2O3 + 2 FeIf you reacted 37 moles of aluminum with Fe2O3 and... more
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01/26/21

calculate the percent yield
Im having problems with this question.calculate the percent yield to two decimal places, leave off final zerosTheoretical: 78.43 g Actual: 66.4 g
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01/26/21

The following chemical equation has NOT been balanced. zinc nitride + chlorine --> zinc chloride + nitrogen How many moles of chlorine gas are needed to react fully with 14.7 g of zinc nitride?
I am completely lost.
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01/13/21

Lithium and water react to form lithium hydroxide and hydrogen gas.
Write appropriate formulas from the word equations. Balance the equation and highlight the coefficients.
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01/13/21

Zinc metal reacts with silver (l) nitrate to form silver and zinc (II) nitrate
Write appropriate formulas from the word equations. Balance the equation and highlight the coefficients.
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01/13/21

Copper (II) chloride reacts with aluminum to form aluminum chloride and copper.
Write appropriate formulas from the word equations. Balance the equation and highlight the coefficients.
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01/13/21

Lead (II) nitrate reacts with potassium chromate to form lead (II) chromate and potassium nitrate

Write appropriate formulas from the word equations. Balance the equation and highlight the coefficients.
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12/27/20

Redox reaction of iron III oxide and carbon monoxide
Balancing redox reaction by Oxidation number method:Fe2O3 + CO ➡️ Fe(s) + CO2 in this oxidation reduction reaction the iron goes from a +3 charge to zero while the carbon goes from +2 to +4.... more
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11/11/20

Express the pressure numerically in atmospheres.
the pressure in car tires is often measured in pounds per square inch (lb/in^2), with the recommended pressure being in the range of 25 to 45 lb/in.2. Suppose a tire has a pressure of 44.0 lb/in.^2... more
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11/08/20

A sample of an ideal gas has a volume of 3.55 L at 14.60 ∘C and 1.90 atm. What is the volume of the gas at 19.80 ∘C and 0.990 atm?
A sample of an ideal gas has a volume of 3.55 L at 14.60 ∘C and 1.90 atm. What is the volume of the gas at 19.80 ∘C and 0.990 atm?
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11/03/20

ferric chloride test
What color appears when ferric chloride is mixed with a-naphthanol and cresol?
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11/02/20

What is the complete balanced ionic equation for the reaction when copper(I) acetate and calcium sulfide are mixed in aqueous solution.

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10/29/20

What is the slope?
A car is going 16 m/s for 15 s.What is the slope?
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10/29/20

Find its average speed.
A passenger jet flies from one airport to another 1,233 miles away in 2.2 h. Find its average speed.
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10/21/20

The action of some commercial drain cleaners is based on the following reaction:2 NaOH(s) + 2 Al(s) + 6 H2O(l) → 2 NaAl(OH)4(s) + 3 H2(g)
What is the volume of H2 gas formed at STP when 4.32 g of Al reacts with excess NaOH?~the answer says its 5.38 L but im trying to understand how to get that. Thank you in advance:)
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10/21/20

Theoretical mass of copper formed from copper (II) sulfate. 2.0 g of zinc 10mL of 6M HCl
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10/21/20

What is the overall charge on the compound, sodium fluoride?
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10/21/20

Chemistry Postlab Problems
Why was a ceramic lid placed on the crucible once the magnesium began smoking and flaming? What error in the final empirical formula would likely have been encountered if the lid was allowed to... more
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10/20/20

Honors chemistry

How many miles of potassium nitrate would be necessary to prepare 116.4 g of lead(II) nitrate? Pb(NO3)2(aq) + 2 KI(aq) + 2 KNO3(aq)
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10/18/20

How many molecules of CO2 are in 0.250 moles of CO2?
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10/18/20

How many grams of NH3 could be formed using 25.8 g of N2?
Ammonia, NH3, is commercially synthesized by the following reaction, known as the Haber process. Assuming that sufficient hydrogen is present for complete reaction, how many grams of NH3 could be... more
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10/18/20

Radox Reactions and Oxidation
Co2+ + FeCo + Fe2 In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. name of the element... more
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