4,365 Answered Questions for the topic Science

06/11/21

Mass of CaCl2: 10,0 g Mass of Na2CO3: 10.0 g Actual amount collected: 2.00 g CaCO3 1. Write a balanced chemical equation.

A student performs a lab at school. They massed out both reactants and then mixed them together. The reaction produced a precipitate. They filtered out the product and took the mass of it. (I'm a... more
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Science

06/11/21

What is the property of metal
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06/10/21

Adipic acid, H2C6H8O4, used to produce nylon, is made commercially by reaction of Cyclohexane (C6H12) and oxygen gas (O2).
a. write the balanced chemical equation for the given reaction above.b. is the reaction exothermic or endothermic? Explain.c. how many grams of Adipic acid will be formed if 25.0g cyclohexane... more
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06/10/21

H2SO4 + 2 NaOH = Na2SO4 + 2 H2O How many grams of Na2SO4 could be produced from 4.94 moles of sulfuric acid?
Grateful for any help given!
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06/10/21

C2H6 + 7O2 = 4 CO2 + 6 H2O If you wanted to produce 5.83 moles of carbon dioxide, how many moles of oxygen would you needed to have started with?
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06/10/21

2 C2H6 + 7O2 = 4 CO2 + 6 H2O If 0.31 moles of H 2 O were produced, how many moles of carbon dioxide would also have been produced?
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06/09/21

2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH How many moles of CaB 2 are produced, if 14.72 moles of NaBr and excess Ca(OH) 2 react?
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06/09/21

2 NABr + Ca(OH)2 = CaBr2 + 2 NaOH What was the initial mass of calcium hydroxide for a reaction that produced 52.9 g of NaOH?
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06/09/21

4. As concentration increases, what happens to the number of ions in the solution? URGENT CHEMISTRY QUESTION
please help me with this chemistry concept and question.
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06/09/21

6. Explain to someone in 3-4 steps how to use pH paper to determine the pH of a substance:   Step 1 – Step 2- Step 3-
help me with this chemistry question
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06/09/21

How does the concentration of ions in a strong base differ from a weak base? CHEMISTRY URGENT
please help me explain this chemistry concept
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06/09/21

Which ions are most abundant in water? - Chemistry URGENT  
Please help me explain this chemistry question.
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06/09/21

What is the density of NH3 at 335 K and 104 kPa?
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06/09/21

What is the mass of a sample of neon gas that has a pressure of 0.77 atm, a volume of 18.95 L, and a temperature of 295 K?
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06/09/21

What is the volume of 17.88 mol of argon gas at STP?
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06/09/21

What volume does a 24.00 gram sample of helium gasoccupy at a pressure of 1.60 atm and at a temperatureof123°C?
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06/09/21

What is the pressure (in kPa) of a 0.055 mol sample of krypton gas that has a temperature of 188°C and a volume of 0.57 L?
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06/09/21

A sample of gas has a volume of 3.91 L, a temperatureof 305 K, and a pressure of 2.09 atm. How many moles of gas are present in the sample?
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06/09/21

A sample of gas has a volume of 3.91 L, a temperatureof 305 K, and a pressure of 2.09 atm. How many moles of gas are present in the sample?
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06/09/21

A sample of neon gas occupies a volume of 461 mL atSTP. What is the volume of the neon gas when thepressure is reduced to 0.76 atm?
please show work !!!!!!!!!!!!!!!!!!
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06/08/21

Stoichiometry.....
1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) Write out all the steps to solve the following problem. 14 moles of O₂ are used to react with propane gas. How many moles of Carbon Dioxide is produced?... more
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06/08/21

Stoichiometry.........
 1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) When solving the following problem, what is your GIVEN? Problem: How many moles of Carbon Dioxide are formed when 7 moles of Propane Gas (C₃H₈) react with... more
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Science Chemistry

06/08/21

Stoichiometry.......
1 C₅H₁₂(g) + 8 O₂(g) → 5 CO₂(g) + __ H₂O(g) when balancing the above equation, how many moles of water are produced when 1 mole of C₅H₁₂ reacts with excess Oxygen Gas? 
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Science Chemistry

06/08/21

Stoichiometric Calculations
1 C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(g) based on this balanced equation, how many moles of water would be produced when 10 moles of oxygen gas (O₂) react with excess propane (C₃H₈)?
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Science Calculus Physics

06/07/21

How much work is done in stretching this spring from a length of 2.5 m to a length of 3.2 m?
A spring with a natural length of 1.8 meters is held at a length of 2.4 meters by a force of 12 N. How much work is done in stretching this spring from a length of 2.5 m to a length of 3.2 m?
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