11/21/18

If this reaction were run using 38 grams of NH3 and excess CuO, how many grams of water would you expect to form?
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11/21/18

Hello. Please help me with this chemistry question. Thank you.
"A mathematician takes a look at your graph and isn't happy that you've drawn a line graph. He becomes further distressed when he sees you've drawn a line of best fit. By considering the nature of... more
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11/21/18

A pair of shoes usually sells for $66. If the shoes are 30% off, and sales tax is 7%, what is the total price of the shoes, including tax?
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11/21/18

Chem question, please help to solve
Write electronic config. Of element with atomic no. 6. Also select any one polyatomic molecule with that element and write its electron dot structure, also find formal charge of that element in the... more
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11/21/18

Calculate molality of 5.01 M (molar) NaOH solution if density of solution is 1.5g/ml. Use log table and show logs used.
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11/21/18

If a substance X has a solubility of 1.9×10−4 mg L−1, and a molar mass of 132 g mol−1, what is the molar solubility of the substance?
If a substance X has a solubility of 1.9×10−4 mg L−1, and a molar mass of 132 g mol−1, what is the molar solubility of the substance?
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11/21/18

What is the Ksp for mercury (I) carbonate (Hg2CO3) if a saturated solution of Hg2CO3 has a concentration of Hg2+ equal to 4.2×10−6 M?
What is the Ksp for mercury (I) carbonate (Hg2CO3) if a saturated solution of Hg2CO3 has a concentration of Hg2+equal to 4.2×10−6 M?Hg2CO3(s)↽−−⇀2Hg+(aq)+CO2−3(aq)
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11/21/18

What is the Ksp for the following equilibrium if zinc phosphate has a molar solubility of 1.53×10−7 M?
What is the Ksp for the following equilibrium if zinc phosphate has a molar solubility of 1.53×10−7 M?Zn3(PO4)2(s)↽−−⇀3Zn2+(aq)+2PO3−4(aq)
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11/20/18

If 6.02 grams of pentane is combusted with 7.52 grams of oxygen, how many grams of water are produced ?
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11/20/18

How do you balance C8H18+O2=CO2+H2O?
Please answer by today or tomorrow.
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11/20/18

The Sun has a radius of 6.955×105 km and a mass of 1.989×1030 kg. What is the density of the Sun?
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11/20/18

length of a rectangle is 6 times its width area is 384yd^2 find perimeter
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11/20/18

Half-Life Calculations
The half-life of Ruthenium-97 is approximately three days. If a 450 g sample of the compound is left to decay during the month of April, how much of the compound will be left? Round your answer to... more
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11/20/18

what is thermodynamics?
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11/20/18

If the molar mass of nicotine is 162.3g/mol, what is its molecular formula?
The empirical formula for nicotine is C5H7N if that is of any assistance.
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11/20/18

How could you manipulate a solution in a lab to form more precipitate? Select all that apply
How could you manipulate a solution in a lab to form more precipitate? Select all that applyHeat the solution. Remove the solid from the solution as it forms. Add more solid to the solution.Add... more
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11/20/18

For the following equilibrium, if the concentration of the sulfate ion is X, what will be the molar solubility of strontium sulfate?
For the following equilibrium, if the concentration of the sulfate ion is X, what will be the molar solubility of strontium sulfate?SrSO4(s)↽−−⇀Sr2+(aq)+SO2−4(aq)
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11/20/18

Calculate the molar solubility of lead (II) chloride (PbCl2) in a 0.010M solution of lead (II) nitrate (Pb(NO3)2). The Ksp of PbCl2 is 1.2×10–5
Calculate the molar solubility of lead (II) chloride (PbCl2) in a 0.010M solution of lead (II) nitrate (Pb(NO3)2). The Ksp of PbCl2 is 1.2×10–5
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11/20/18

Calculate the molar solubility of lead (II) chloride (PbCl2) in a 0.010M solution of lead (II) nitrate (Pb(NO3)2). The Ksp of PbCl2 is 1.2×10–5
Calculate the molar solubility of lead (II) chloride (PbCl2) in a 0.010M solution of lead (II) nitrate (Pb(NO3)2). The Ksp of PbCl2 is 1.2×10–5
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11/20/18

half life of tree
The​ half-life of​ carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 72​% of the​ carbon-14 expected in living​ matter, when did the tree​ die?
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11/20/18

The​ half-life of radium is 1690 years. If 20 grams are present​ now, how much will be present in 520 ​years?
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11/19/18

For the reaction, calculate how many moles of the product form when 2.45 mol of O2 completely reacts. Assume that there is more than enough of the other reactant. 2H2(g)+O2(g)→2H2O(l)
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11/19/18

How many ounces of 20% hydrochloric acid and 70% of hydrochloric acid must be mixed to make 20 ounces of 50% hydrochloric acid?
What equations can you create to solve this problem?
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11/19/18

Conversion of butanone to 2-butene reaction in two step
Conversion of butanone to 2-butene reaction
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11/19/18

A hair dye is made by blending 7% hydrogen peroxide solution and 4% hydrogen peroxide solution. How many milliliters are used of each to make a 300mL of 5% solution.
All help is appreciated!
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