03/29/21

Unit 6 Test Review
Nitrogen gas can be prepared by passing gaseous ammonia over solid copper (II) oxide at high temperatures. If a sample of 18.1g of ammonia is reacted with 90.4g of copper (II) oxide, how much... more
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03/29/21

Unit 6 Test Review
Elemental iron can be formed from iron (III) chloride and elemental lithium. How many grams of iron can be made from 23.1g of lithium and 45g of iron (III) chloride?Li + FeCl3 → LiCl + Fe... more
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03/28/21

How much energy in kJ is evolved during the reaction of

 Fe 2O 3(s) + 2 Al(s) → Al 2O 3(s) + 2 Fe(s) ΔH° rxn = -852 kJHow much energy in kJ is evolved during the reaction of 74.6 g of Al, according to the reaction below? Assume that there is excess... more
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03/28/21

boyle’s gas law

100.0 ml at 780.0 mm to standard pressure
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03/28/21

Can someone please help me with these two Chemistry questions?
Polar covalent compounds, like water, can dissolve ____A. blood stainsB. grass stains C. sugar D. cotton woolE. olive oilFor this question, I got C. sugar. Is this correct?Non-polar covalent... more
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03/27/21

Chemistry My Lab

3H2(g)+N2(g)-> 2NH3(g)1.26 g H2 is allowed to react with 10.3g N2, producing 2.56 g NH3.Part A- What is theoretical yield in grams for this reaction under the given conditions ? Part B- what is... more
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03/27/21

Five subtracted from w is less than or equal to 28
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03/27/21

If 15.0 g of each reactant is present, what is the mass of product produced?
Here is the formula (balanced): 2AI (s)+ 3Cl2 ---> AICl3I just need help finding the product that is produced from 15 of AI and 15g of Cl2, thanks!
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03/27/21

Stoichiometry work
10.0 grams of calcium is added to HCl. Ca   +  HCl →  CaCl2      +   H2How many grams of HCl would be needed to completely react with the Ca?
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03/27/21

chem help please
A 0.462 g sample of oxygen gas at 68.5 psi occupies a volume of 84.6 mL, what is the temperature in Kelvin?Answer value
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03/26/21

HOw do I work this equeation
When 6 is subtracted from five times a number the result is 9
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03/26/21

Please help me as soon as possible please with algebra homework

Question 1.) A carpet cleaning business has 100 customers when they charge $125 for a cleaning. Research shows that every $5 reduction in price attracts another 20 customers. Which equation could... more
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03/26/21

chemistry question help
A sample of nitrogen gas at 0.855 atm is compressed to a new volume of 600 mL and now has a pressure of 827 mm Hg. What was the original volume in liters if the temperature remained 328.2oC the... more
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03/26/21

chemistry question help
A 0.796 g sample of oxygen gas at 69.6 psi occupies a volume of 67.0 mL, what is the temperature in Kelvin?
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03/26/21

Stoichiometry chem

If you have the balanced formula C2H8 + 5 O2 - 3CO2 + 4 H2O, and your perform this reaction and receive 125. moles of water, how many moles of carbon dioxide should you have?then using the same... more
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03/26/21

Chemistry Question
Calculate the yield of CO2 on combustion of propane (based on – propane + O2 gives CO2 and water), starting with 5g of propane and 3g of O2What is the actual and theoretical yield?
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03/25/21

Adding Heat to Water - Final Temp?
If 8.700g of C6H6 is burned and the heat produce from the burning is added to 5691 g of water at 21 degrees Celsius, what is the final temperature of the water?
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03/25/21

Hola I need much assistance with my homework please as soon as possible please

1.) 2 NH3 + 3 CuO → 3 Cu + N2 + 3 H2OIn the above equation, how many grams of N2 can be made when 11.8 moles of CuO are consumed?Round your answer to the nearest tenth. If you answer is a whole... more
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03/25/21

For the following reaction, how many grams of H2O will be produced if you react 3.7 grams of B2H6? B2H6 + 3 O2 → 2 HBO2 + 2 H2O
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03/25/21

When separating NaCI from sand, we primarily use _____ to selectively dissolve _______ a) Water,sand B) Ethnol,NaCI C) Ethnol,Sand D) Water, NaCI
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03/25/21

which of the following is not a anion? a) cyanide b) Chlorite c) copper d) chloride

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03/25/21

Hope someone answer!!
When 100 grams of HCl reacts with 80 grams of Mg(OH)2 (a total mass of 180 grams), then 50 grams of MgCl2 is produced. How many grams of H2O will also be produced?
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03/25/21

Hola I need so much help with my chemistry homework please can someone actually help me as soon as possible please

1.) 3 Cu + 8HNO3 → 3 Cu(NO3)2  + 2 NO + 4 H2OIn the above equation, how many grams of water can be made when 4.3 moles of HNO3 are consumed?Round your answer to the nearest tenth. If you answer is... more
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03/25/21

Find the percent composition for all the compounds C8H10N4O2. Round to the nearest hundredth.
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03/25/21

Find the percent composition for all the compounds NaHCO3. Round to the nearest hundredth.
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