4,347 Answered Questions for the topic Science

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?
Grateful for any help given!
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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?
Grateful for any help given!
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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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Science Calculus Physics

06/07/21

How much work is required to pump all of the water to a spout even with the top of the tank?
A water tank is shaped like a pyramid with its point down. The top base of the pyramid is a square with 8 meter sides. The bottom point of the pyramid is 10 meters below the center of the top base.... more
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06/06/21

What is the theory of relativity in simple terms? - Easy to understand

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Science

06/06/21

compare the plant cells and animal cells .can they make food? explain.
Please Explain Your Answer. :D
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06/05/21

Advance Physics
How can you improve the accuracy of a specific heat capacity experiment?
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06/04/21

atoms to grams of calcium
How many atoms of calcium are in 3456 grams of calcium? a) 5.19e25b) 2.30e-19c) 8.34e28d) 1.43e-22
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Science Chemistry

06/04/21

Hi, someone please help me with this and how am i gonna know if it's acidic or basic?
Calculate thehydrogen ionconcentration of asolution with a pOHreading of 7.8
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