12/14/20

Chemistry Homework question
Consider the following two unbalanced reduction half-reactions and their associated standard reduction... more
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12/14/20

How many oxygen atoms are in the reaction of butane ,,How many oxygen atoms are in the product of butane
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12/14/20

Using the following data, calculate the standard heat of formation of ICL(g)in kJ/mol:(a)Cl2(g)→2Cl(g)∆H°=242.3kJ;(b)I2(g)→2I(g)∆H°=151.0kJ;(c)ICL(g)→I(g)+CL(g)∆H°=211.3kJ;(d)I2(s)→I2(g)∆H°=62.8kJ
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12/14/20

I'm very confused about this please help! (Hess Law)
Using the equations 2 C₆H₆ (l) + 15 O₂ (g) → 12 CO₂ (g) + 6 H₂O (g)∆H° = -6271 kJ/mol 2 H₂ (g) + O₂ (g) → 2 H₂O (g) ∆H° = -483.6 kJ/mol C (s) + O₂ (g) → CO₂ (g) ∆H° = -393.5 kJ/mol Determine the... more
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12/14/20

2A + 3B → 4C At a certain point during the reaction shown above, the rate of appearance of C is measured to be 0.533 M/s. At this same point, what is the rate of the reaction?
2A + 3B → 4CAt a certain point during the reaction shown above, the rate of appearance of C is measured to be 0.533 M/s. At this same point, what is the rate of the reaction?
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12/13/20

Regarding pka of Norepinephrine bitartarte
Norepinephrine bitartrate has two Pka values pka1=8.85(strongest basic) and pka2=9.5 (Strongest acidic) How a Pka value of 9.5 represents strongly acidic? Does this Norepinephrine bitartrate is... more
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12/13/20

final temperature of water if no heat is lost?
A 0.551g sample of steam at 103.4 C is condensed into a container with 5.63g of water at 14.0 C. What is the final temperature of the water mixture if no heat is lost? The specific heat of water is... more
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12/13/20

Determine the total voltage produced by Manganese(II) bromide and potassium metal
Show ALL work. Use redox reaction to derive
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12/13/20

Determine the Total voltage produced by Gold(III)acetate and calcium metal
Must show all work. Derive using redox reactions.
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12/13/20

Chemistry: Pi Bonding
What atomic or hybrid orbitals make up the  bond between C1 and C2 in dichloroethylene, CH2CCl2 ?Orbital on C1?Orbital in C2?How many σ bonds does C1 have in CH2CCl2 ? How many  bonds does C1 have ? 
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12/13/20

Calculate the volume of 16 grams of Sulfur Dioxide at STP
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12/12/20

Chemistry: Pi Bonding
If an atom has sp2 hybridization in a molecule:The maximum number of σ bonds that the atom can form is _____The maximum number of p-p  bonds that the atom can form is _____
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12/12/20

Chemistry: Pi Bonding

What atomic or hybrid orbitals make up the  bond between C1 and C2 in propyne, CHCCH3 ?Orbital on C1?Orbital on C2?How many σ bonds does C1 have in CHCCH3 ? How many  bonds does C1 have ? 
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12/12/20

Sigma Bonds and Hybrid Orbitals
What atomic or hybrid orbitals make up the sigma bond between C and H in methane, CH4?orbital on C?orbital on H?What is the approximate H-C-H bond angle?______°
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12/12/20

Calculate the water's change in internal energy
The vaporization of 1 mole of liquid water (the system) at 100.9°C, 1.00 atm, is endothermic.H2​O(l)+40.7kJH2​O(g)Assume that at exactly 100.0°C and 1.00 atm total pressure, 1.00 mole of liquid... more
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12/12/20

Calculate the enthalpy change per mole of H2SO4 in the reaction
A 105.2 mL sample of 1.00 M NaOH is mixed with 52.6 mL of 1.00 M H2SO4 in a large Styrofoam coffee cup; the cup is fitted with a lid through which passes a calibrated thermometer. The temperature... more
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12/12/20

Calculate the pH of a 6.2 x 10-11 M HCl solution
 a) - 0.60   b) 13.30 Correct!  c) 7.00   d) 0.99 
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12/12/20

What is the molarity of the sodium hydroxide sample?
Balanced equation: 2 NaOH + H2SO4 → Na2SO4 + 2H2O A neutralization reaction was performed by reacting sodium hydroxide with sulfuric acid (H2SO4) and the following data was taken Volume of sodium... more
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12/12/20

50.0 mL of 0.200 M KF solution is mixed with 15.0 mL of 0.250 M Pb(NO3)2 solution.
Question: How many grams of precipitate would be formed?
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12/12/20

NEED HELP NOW 2 C8H18 + 25 O2 --> 16 CO2 + 18 H2O Calculate the mass in grams of carbon dioxide produced from 11.2 g of octane (C8H18) in the reaction above.
answer choice: 46.2 g 89.6 g 34.5 g 17.3 g
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12/12/20

Calculate the pH of a 0.210 M HF solution. The pKa of HF is 3.14.
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12/12/20

NH3(g)+?O2(g)→?NO(g)+?H2O(g) What volume of H2O(g) is produced by the reaction under the same conditions
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12/12/20

Write the cell reaction for the given cell diagram
A. Cu(s) | Cu^2+ | | Fe^2+ | Fe(s) B. Ag(s) | Ag^+ | | Mg^2+ | Mg(s)C. Ag(s) | AgCl1 Cl^- | Na^+ | Na(s)D. Pt(s) | Sn^+ 1Sn^2+ | | Ni^2+ | Ni(s)
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12/11/20

How, would you prepare 200.0 mL of 0.100 M nitric acid solution from 6.0M stock solution?
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12/11/20

A chemist makes a stock solution of potassium chromate by dissolving 97.1 grams of potassium chromate,

in enough water to make 1.00 liter of solution. What volume of the stock solution must be diluted with water in order to prepare 200. mL of 0.200M solution?
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