03/04/21

chemistry homework question
The rate constant for this second‑order reaction is  0.820 M−1⋅s−1 at 300 ∘CA⟶productsHow long, in seconds, would it take for the concentration of A to decrease from 0.990 M to  0.400 M?
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03/04/21

Does a reaction occur when aqueous solutions of cobalt(II) sulfate and calcium chloride are combined?

I have been trying this question all day long but I always have something wrong. Thanks for helping. Does a reaction occur when aqueous solutions of cobalt(II) sulfate and calcium chloride are... more
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03/04/21

The following molecular equation represents the reaction that occurs when aqueous solutions of silver(I) nitrate and copper(II) chloride are combined.

I have been trying all day long but I always have something wrong. Thanks for helping.The following molecular equation represents the reaction that occurs when aqueous solutions of silver(I)... more
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03/04/21

Write the net ionic equation for the following molecular equation. 3BaCl2(aq) + 2K3PO4(aq) Ba3(PO4)2(s) + 6KCl(aq)
I was trying to do this problem all day but I always have something wrong. Thanks for helping.Write the net ionic equation for the following molecular... more
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03/04/21

Grams to Grams and Gas Stoichiometry Assignment
Avogadro came up with the idea using the “mole” to describe the amount of material present in chemical reactions. At that time, he also made a theory about how this number of molecules would occupy... more
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03/04/21

using table I, Determine the heat of reaction (in kJ) for the formation of 3.0 mole of NO2 (g)
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03/04/21

Grams to Grams and Gas Stoichiometry Assignment

2 Al + 3 Cl2 --- > 2 AlCl3If 11.0 grams of aluminum reacts, how many liters of chlorine will be used?
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03/04/21

When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:
Please can someone help me with this one.Thanks for helpingWhen aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium... more
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03/04/21

Write the balanced net ionic equation for the reaction. 3Pb(NO3)2 (aq) + 2FeCl3 (aq) 3PbCl2 (s) + 2Fe(NO3)3 (aq)
Help. I have being trying this one all day but I do something wrong. I appreciate your help3Pb(NO3)2 (aq) + 2FeCl3 (aq) 3PbCl2 (s) + 2Fe(NO3)3 (aq)
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03/04/21

Write the net ionic equation for the following molecular equation. Cr2(SO4)3(aq) + 3(NH4)2CO3(aq) Cr2(CO3)3(s) + 3(NH4)2SO4(aq)
Hi, Could you please help me. Im trying this exercise but I dont get it.. Apreciate your helpWrite the net ionic equation for the following molecular... more
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03/04/21

Can anyone help me with this question
carboxyl group in an organic acid is weakly acidic. It can neutralize a base, OH-(aq). The general chemical equation for this neutralization is given below.RCOOH + NaOH ® RCOONa + H2OIf 20 mL of... more
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03/03/21

Redox reactions
(Cr2O7)2- + 2Al + 14H+ <—> 2Cr3+ + 2Al3++ 7H2O1) how many ml of solution 1.50 M e (Cr2O7)2- are needed to act without residue with 0.8 grams of Al?2) what is the concentration of the... more
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03/03/21

0.5 moles of water=? Grams
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03/03/21

2.3 moles of NaCl= ? Grams

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03/03/21

The chemical reaction to produce water: 2H2(g) + O2(g) → 2H2O(g)
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03/03/21

Fe(s) + CuSO4(aq) → FeSO4(aq) + Cu(s)
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03/03/21

What is the mass of 5.20 L of fluorine gas (F2) at STP?
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03/03/21

The vapor pressure of a solution is proportional to its mole fraction. What is the mole fraction of ethanol in a mixture of 20. g of ethanol

The vapor pressure of a solution is proportional to its mole fraction. What is the mole fraction of ethanol in a mixture of 20. g of ethanol (C2H6O) and 50. g of propanol (C3H8O)?
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03/03/21

asap help please in chemistry

What is the freezing point of a solution made from 200 g of glucose (C6H12O6 ) and 350 g of benzene? The normal freezing point of benzene is 5.5 °C, and Kf, benzene = 5.12 ° C/m.
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03/03/21

i dont know the solution to this question
What is the mole fraction of the solute in a solution consisting of 0.45 mole of KCl in 7.0 moles of H20
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03/03/21

Chemistry II MM of Compound
A 0.520 g sample of an unknown nonelectrolyte compound is dissolved in 4.02 g of lauric acid (Kf = 3.90 °C/m). The freezing point depression is determine to be 4.20 °C. What is the molar mass of... more
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03/03/21

I have Chemistry question
Calculate the pH and the pOH of an aqueous solution that is 0.050 M in HCl(aq) and 0.090 M in HBr(aq) at 25 °C.
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03/03/21

How many formula units are in 35.5 mol carbon dioxide?

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03/03/21

describe the concentration of particles in beaker C in compared to beaker B?
How would you describe the concentration of particles in beaker C in compared to beaker B?
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03/03/21

order of the beakers from lowest to highest concentration
Using the pictures below, tell me the order of the beakers from lowest to highest concentration. Remember concentration represents the number of solute particles (. ) per volume of solution.
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