03/18/20

Periodic table/electron configuration/ion help
Formula of ionic compound formed: Mg3N2Cation formed?Anion formed?Electron configurations?
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03/18/20

Consider an ion with the symbol X 2+ formed from a main group element...
a) What is the group number of this element?b) If X is in period 3, what is the element?c) What is the formula of the compound formed from X and the nitride ion?
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03/18/20

What is the balance equation for the neutralization of Hydrochloric acid with aluminum hydroxide include physical states
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03/18/20

Identify each of the following atoms or ions, use the correct name/nomenclature...
1) 18 e- 16 p+ 16 n2) 8 e- 8 p+ 8 n3) 23 e- 26 p+ 28 n
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03/18/20

Determine the pH at the equivalence (stoichiometric) point in the titration of 40 mL
Determine the pH at the equivalence (stoichiometric) point in the titration of 40 mL of 0.12 M HNO2(aq) ith 0.1 M NaOH(aq). The Ka of HNO2 is 7.1 x 10-4.The answer is 7.94
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03/18/20

Calculate the pH during the titration of 20.00 mL of 0.1000 M ethylamine
Calculate the pH during the titration of 20.00 mL of 0.1000 M ethylamine, C2H5NH2(aq), with 0.2000 M HNO3(aq) after 3.5 mL of the acid have been added. Kb of ethylamine = 6.5 x 10-4.The answer is... more
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03/18/20

What is the percent by volume of isopropyl alcohol in a solution that contains 25 mL of isopropyl alcohol in 2.2 L of water?
What is the percent by volume of isopropyl alcohol in a solution that contains 25 mL of isopropyl alcohol in 2.2 L of water?
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03/18/20

You have 1235.3 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?
You have 1235.3 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?
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03/18/20

What are the molality and mole fraction of solute in a 36.6 percent by mass aqueous solution of formic acid (HCOOH)?
What are the molality and mole fraction of solute in a 36.6 percent by mass aqueous solution of formic acid (HCOOH)?
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03/18/20

What is the kinetic energy in joules of 850g motorcycle moving 61 m/s? Calculate the potential energy of the motorcycle when on a steep hill 40 meter high?
Energy KE=0.5 mv2
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03/18/20

Given 2C + 2 H2 →C2H4 ∆H=52.3 What mass of C is needed to react with Hydrogen with 160 kJ of energy?
Thermochemical equations
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03/18/20

Given H2 + F2 → 2HF ∆H= -537 kJ How much heat is required to react 3 g F2 with H2?
Thermochemical equations
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03/18/20

What mass of water will change its temperature by 3 0C when 525 J of heat is added to it? The specific heat of water is 4.18 J/g C

Measuring Heat Q=mc∆T
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03/18/20

How many joules of heat are lost by 358, 000 g granite as it cools from 41.2C to -12.9C and has a specific heat of 1.023 J/gC ?
Measuring Heat Q=mc∆T
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03/18/20

chemistry 1 help
The Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In the first step of the Ostwald process, ammonia is reacted with oxygen... more
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03/18/20

chemistry 1 help
If 27 moles of MnO2 combine with 31 moles of Al, how many moles of Mn can form? What is the limiting reagent?3MnO2(s)+4Al(s)⟶3Mn(s)+2Al2O3(s)Step 1: Find the number of moles of Mn each starting... more
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03/18/20

chemistry 1 help
For the chemical reaction2HCl+Ca(OH)2⟶CaCl2+2H2Ohow many moles of calcium chloride will be produced from 21.0 g of hydrochloric acid?
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03/18/20

Chemistry 60 help
The reaction between hydrochloric acid and aluminum produces hydrogen gas and aluminum chloride. How many moles of H2 can be obtained when 6.60 mol HCl reacts with an excess 6HCl+2Al⟶3H2+2AlCl3
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03/18/20

For the chemical reaction, 2 KI + Pb ( NO 3 ) 2 ⟶ PbI 2 + 2 KNO 3 what mass of lead(II) nitrate in grams is needed to produce 4.25 mol of potassium nitrate?
For the chemical reaction, 2KI+Pb(NO3)2⟶PbI2+2KNO3what mass of lead(II) nitrate in grams is needed to produce 4.25 mol of potassium nitrate?
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03/17/20

What is the mass of sodium chloride used to create a 100 mL solution at a concentration of 1.5 M? Solution must include a step by step solution with units included throughout, please help?
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03/17/20

Find the enthapy change for the reaction in kJ . 4NH3(g) + 5O2(g) --> 4NO(g) + 6H2O(g) ΔH= ? Given : (NH3(g)) = -46.1, (NO(g)) = + 90.3 kJ/mol and (H2O(g)) = -241.8 kJ/mol.

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03/17/20

Chemistry atomic structure
An acidified solution of the salt KC1Ox (x = 1, 2 or 3) will oxidise Fe2(aq) to Fe3+(aq) quantitatively, the chlorine being reduced to Cl-(aq). When 0.150 g of the salt KClOx was reacted with... more
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03/17/20

Chemistry Atomic structure
Explain why the second ionisation energy of Magnesium is lower than that of Aluminium
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03/17/20

For the chemical reaction 2 HCl + Ca ( OH ) 2 ⟶ CaCl 2 + 2 H 2 O how many moles of calcium chloride (CaCl2) are produced from 2.0 mol of hydrochloric acid (HCl)
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03/16/20

Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2COOH
Calculate the pH during the titration of 20.00 mL of 0.1000 M CH3CH2COOH(aq) with 0.2000 M LiOH(aq) after 7 mL of the base have been added. Ka of propanoic acid = 1.3 x 10-5.The answer is 5.25
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