01/09/22

Kj of heat needed to convert a liquid to gas
What amount of heat (in kJ) is required to convert 10.1 g of an unknown liquid (MM = 83.21 g/mol) at 19.2 °C to a gas at 93.5 °C? (specific heat capacity of liquid = 1.58 J/g･°C; specific heat... more
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12/16/21

‎‎How to get van't Hoff Factor and Freezing Point
Kf (°C‎/m) of water 1.86 Free‎zing P‎oint of Wa‎ter, °C 0.00 SO‎LVENT 100‎.0 g wat‎er Ma‎ss / Vol‎ume adde‎d Add‎ed reag‎ent Mole‎cular Wei‎ght van't H‎off Fac‎tor m Fre‎ezing... more
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12/07/21

using heat of fusion or vaporization to find the heat needed to melt or boil a substance
Calculate the amount of heat needed to boil 10.5g of methanol (CH3OH), beginning from a temperature of −51.2°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit... more
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11/08/21

Titration complete neutralization
For the acid-base reaction (called titration) of sulfuric acid (H2SO4) with sodium hydroxide (NaOH). How many moles of sodium hydroxide would be required to react with 1.03 L of 0.500 M sulfuric... more
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11/08/21

Chemistry Question
From the balanced reaction below, when 2.22 x 1024 atoms of oxygen is used up, how many grams of aluminium oxide will be produced?4Al + 3O2 --> 2Al2O3
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11/07/21

Chemistry in uni
Hey!We have the following reaction: C4H10 (g) + O2 (g) -> CO2 (g) + H2O (l)We react 0.10 mole of C4H10 with 0.50 mole of O2 (g). How many moles of CO2 can we get maximum?I get 0,4. Is it correct... more
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11/07/21

How do I find pH?
Hey!We dissolve 102,69g of HClO2 in water. The volume of the solution will be 0,300 L. What is the pH of the solution (Ka = 0,0100)? I got 0,22.Is it correct? if not, how do i solve this and what... more
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11/07/21

A 12.0 L gas cylinder is filled with 10.0 moles of gas. The tank is stored at 53 ∘C . What is the pressure in the tank?
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11/07/21

A 12.0 L gas cylinder has been filled with 4.20 moles of gas. You measure the pressure to be 5.00 atm . What is the temperature inside the tank?
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11/07/21

What Celsius temperature, T2, is required to change the volume of the gas sample in Part A (T1 = 11 ∘C , V1= 1400 L ) to a volume of 2800 L ?

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11/06/21

How many moles of carbon dioxide would be produced by the complete combustion of 54.5 grams of sucrose in the presence of excess oxygen?
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11/05/21

For the given reaction, what volume of CO2 can be produced from 3.1 L of O2 , assuming an excess of CO ? Assume the temperature and pressure remain constant. 2CO(g)+O2(g)⟶2CO2(g) 𝑉= L
I need help with the steps to finding the volume in Liters
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11/04/21

Sulfuric acid (H2SO4) reacts with sodium hydroxide (NaOH) to produce water (H2O) and sodium sulfate (Na2SO4). In order to react 100 g of sulfuric acid, how many grams of sodium hydroxide are required
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11/04/21

A salt bridge...
A. is made up of an aqueous ionic compoundB. has positive ions that are attracted to the cathodeC. has negative ions that are attracted to the anodeD. allows the reaction of the galvanic cell to... more
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11/04/21

What is the charge that an atom in a molecule would develop if the most-electronegative atoms in the molecule took the shared electrons from the less-electronegative atoms?
A. corrosion factorB. oxidation numberC. oxidation processD. reduction processE. None of the Above
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11/04/21

A solution with a volume of 4.0 L that contains 2.0 mol of KNO3 has a molarity of 8.0 M 0.50 M 2.0 M 4.0 M
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11/04/21

What is the relationship of: a. enzyme and temperature, b. enzyme and pH, and; c. enzyme and substrate type.

What is the relationship of:a.    enzyme and temperature,b.    enzyme and pH, and;c. enzyme and substrate type. 
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