05/10/18

Titration problem
what vol of 0.100M NaOH solu nece to neutralize the excess HCl if 50.00ml of 0.121 M HCl are added to a 0.200g if Calcium carbonate
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05/10/18

Chemistry Question
Suppose 35 mL of 0.1 M of ammonia, NH3 is moxed with 20 mL of 0.1 M of HCl. Calculate the pH of the resulting solution.
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05/10/18

Chemistry Question
Consider an aqueous solution of ammonia, NH3, a base. If the resulting pH of this solution is 9.5, then what is the concentration of this ammonia solution? Note that the Ka for ammonium, NH4, is... more
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05/10/18

Chemistry Question
Calculate the pH of a solution involving the addition of 35 mL of 0.1 M acetic acid, CH3COOH, to 350 mL of water. Ka for acetic acid is 1.8 x 10^(-5). Thank you!
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05/10/18

Chemistry Question
A + B = C + D When 0.5 M of a is mixed with 0.5 M of B, the final concentrations of C and D are both 0.15 M. Assuming there was no starting product, calculate the value for the equilibrium... more
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05/10/18

Chemistry Problem
Consider a battery made of the following.Ni(s)|Ni2+(aq)||VO+2 (aq),H+(aq),VO2+(aq)|Pt(s) The concentrations of some of the species are given below.[VO2+] = 0.1M [VO+2 ] = 0.1M [Ni2+] = 0.02MIf you... more
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05/10/18

how does purity improve accuracy
I need help with this question
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05/10/18

A calculation that predicts how many milliliter of 0.121M of HCL acid solution needed to a 0.200g sample of calcium carbonate
How many milliliters of 0.121 M of HCL solution you will need to titrate a 0.200g sample of calcuim carbonate
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05/09/18

Pressure only has an effect on matter in the gas phase.
 Pressure only has an effect on matter in the gas phase.
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05/09/18

Why does solid CO2 become a gas at room temperature, but SiO2 does not?
Hi, I'm currently learning about intermolecular forces and atomic radius, and this question has appeared:   Why does solid CO2 become a gas at room temperature, but SiO2 does not? 
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05/09/18

the fluid mosaic model describes the plasma membrane as a structure that is liquid and very rigid
is this question true or false?
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05/09/18

Titration question.
This is the full question    Samples of hydrochloric acid, of unknown concentration, were titrated with a solution of sodium carbonate. The flasks were rinsed with sodium carbonated stock... more
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05/09/18

Will a bubble filled with Carbon Dioxide sink or float in air? why
I am doing research for a project but i cant find the proper websites that can help me gather information.
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05/08/18

queston in description
how many grams of Cr2(CO3)3 will react with 526cm3 of 1.37 M H2SO4?   Cr2(CO3)3 (aq) + H2SO4 (aq)   ---->  Cr2(SO4)3 (aq)  +  CO2 (g) + H2) (I)   Need help solving 
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05/08/18

queston in description
How many liters of Dihydrogen gas will form at 5 C and 752 torr when 175.0 cm3 of a 1.07 M Phosphoric Acid reacts with 2.5g of Zinc Metal Forming Zinc Phosphate as the other product?
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05/08/18

queston in description
A solution contains 120.5g of CaCI2 dissolved in 517 grams of water.   A. if water boils at 97.5 at what temperature will this solution boil?   B.If water freezes at 0.7 C at what temp. with... more
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05/08/18

queston in description
An ice cream maker workss on the principle that salt water freezes at a much colder temperature than pure water. Rock salt ( NaCI) is mixed with crushed ice to produce a slurry that cools the milk... more
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05/08/18

Chemistry Help, Boyle's Law?
At a deep-sea station 200. m below the surfaceof the Pacific Ocean, workers live in a highlypressurized environment. How much gas atSTP must be compressed on the surface to fillthe underwater... more
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05/08/18

How many liters of water are there in 4.4 pounds of pater at 4 degrees Celsius?
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05/08/18

Solving for a gaseous reactant
Write a balanced chemical equation, including physical state symbols, for the combustion of liquid hexane in to gaseous carbon dioxide and gaseous water.   Suppose 0.260 kg of hexane are burned... more
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05/07/18

Carbon is the basis of all life and is constantly being cycled through ecosystems. In which form is carbon passed along from plants to animals?
 whats answer  
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05/07/18

how do we compare dipole moment of two bonds containing 1 element in common?
for eg lets say F-N and F-H. does it depend on electronegativity difference?. what does the charge term in the formula of dipole moment signify?
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05/06/18

Calculating mole fraction in a gas mixture
A 6.00 L tank at 9.9 C is filled with 8.35 g of carbon monoxide gas and 13.0 g of sulfur hexafluoride gas. You can assume both gasses behave as ideal gasses under these conditions. Calculate the... more
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05/06/18

How much potassium does a sample have
The number the ratio of nitrogen to potassium in a sample of soil is 12 to 9 the sample has 36 units of nitrogen 
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05/06/18

Calculating mole fraction in a gas mixture
A 8.00 L tank at 28.5 C is filled with 19.2 g of carbon dioxide gas and 8.08 g of carbon monoxide gas. You can assume both gasses behave as ideal gasses under these conditions. Calculate the mole... more
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