02/22/18

HOMEWORK CHEMISTRY
What is the molarity of ZnCl2 that forms when 30.0 g of zinc completely reacts with CuCl2 according to the following reaction? Assume a final volume of 260 mL . Zn(s)+CuCl2(aq)→ZnCl2(aq)+Cu(s)
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02/22/18

chemistry homework
Classify the following reactions:A.  HCl(aq)+NaOH(aq)→NaCl(aq)+H2O(l)B.  Ba(OH)2(aq)+ZnCl2(aq)→BaCl2(aq)+Zn(OH)2(s)C.  2AgNO3(aq)+Mg(s)→Mg(NO3)2(aq)+2Ag(s)   FROM 3 REACTIONS A,B,C YOU WILL... more
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02/22/18

how many moles of aluminum are needed to form 18.06 x 10^23 formulas units of Al2O3
4 Al(s) + 3 O2 (g) = 2 Al2O3(s)
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02/22/18

Gas law question
Sulfur trioxide, SO3 (g), decomposes into sulfur dioxide gas and oxygen gas according to the following equation: 2SO3 (g) → 2SO2 (g) + O2 (g) Assuming the reaction fully completes explain why,... more
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02/22/18

Solving a percent mixture
The Royal Fruit Company produces two types of fruit drinks. The first type is 65% pure fruit juice, and the second type is 95% pure fruit juice. The company is attempting to produce a fruit drink... more
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02/21/18

is the molecule SCl2 ionic, polar, or nonpolar?
i calculated the electronegativity and got 3.5 so that is suppose to be ionic, right? not sure, thank you!!!  
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02/21/18

ZnBr2(aq)+Na2(aq)---> ZnS(s)+NaBr(aq)
Write the net ionic equation for this reaction  
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02/21/18

A store mixes Kenyan coffee worth ​$12 per kilogram and Turkish coffee worth $ 14 per kilogram. The mixture is to sell for ​$13 per kilogram.
A store mixes Kenyan coffee worth $12 per kilogram and Turkish coffee worth $ 14 per kilogram. The mixture is to sell for $13 per kilogram. Find how much of each should be used to make a... more
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02/21/18

HOMEWORK HELP
Which of the following compounds is soluble in water?Which of the following compounds is soluble in water?MgCO3PbCl2BaSO4CaSNone of these compounds is soluble in water.
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02/21/18

HOMEWORK HELP
If 3.0 L of a 5.2 M SrCl2 solution is diluted to 50 L , what is the molarity of the diluted solution?Express your answer using two significant figures.
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02/21/18

HOMEWORKHELP
Calculate the mass percent composition of sulfur in Al2(SO4)3.42.73 %35.97 %21.38 %9.372 %28.12 %
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02/21/18

HOMEWORK HELP
A 0.72 mg sample of nitrogen reacts with chlorine to form 6.19 mg of the chloride.What is the empirical formula of the nitrogen chloride?Express your answer as a chemical formula.
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02/21/18

stoichiometric ratio
I have an unknown sample of carbonate. The pressure and volume were measured after the temperature stabilized at 21.5C.  Given the data below what is the stoichiometric ratio between HCl and... more
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02/20/18

200ml = 35g. How much gram for 60ml (60ml = ?g)?
I need to feed newborn baby kitten (powder milk).    200ml = 35g. How much gram for 60ml (60ml = ?g)?   Also, how much in tablespoon measure? 200ml = 35g / ? tablespoon 60ml = ?g / ?... more
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02/20/18

I’m doing revision questions and do not know how I would do these gas law questions
2. The inflation of an air bag during a car crash is due to production of nitrogen gas, N2(g), by the following reaction: 2NaN3(s) → 2Na(s) + 3N2(g) a) What volume of N2 is produced when 120 g of... more
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02/20/18

How many grams of cacl2 would be used in making of 5.00x10² cm³ of a 5.0M solution (molarity)
Chemistry  Molarity 
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02/20/18

most plants and animals consist of many kinds of cells
is it true or false?
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02/20/18

HOMEWORK HELP
) if you want to produce 1.00 g of aluminum, how much bauxite ore would you have to extract? 2) was your percent yield value calculated from the laboratory 100%. If not, propose reasons it might... more
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02/19/18

Milk of magnesia is often taken to reduce the discomfort associated with heartburn. The recommended dose is one teaspoon, which contains 175 mg of Mg(OH)2. If t
Milk of magnesia is often taken to reduce the discomfort associated with heartburn. The recommended dose is one teaspoon, which contains 175 mg of Mg(OH)2. If the stomach contains 352 mL of pH 1.3... more
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02/19/18

how many moles of oxygen gas are produced from the decomposition of 4.53 moles of potassium chlorate
2 KCI to 2 KCI plus 3 O2
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02/19/18

Cation electron configuration
Which of the following actions will have the electron configuration 1s22s22p63s23p6 - Ca2+ - Co2+ - Scl+ - Cll+
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02/19/18

Enthalpy diagram help
Given that: Sn(s) + Cl2 (g) → SnCl2 (s); ΔH = - 350 kJ mol-1 and Sn (s) + 2Cl2 (g) → SnCl4 (s); ΔH = - 542 kJ mol-1draw a thermal cycle and calculate the enthalpy change for SnCl2 (s) + Cl2 (g) →... more
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02/19/18

The aluminum sulfate hydrate [Al2(SO4)3•xH2O]contains 8.10percent Al by mass.Calculate x that is,the number of water molecules associated with each Al2(SO4)unit
Help cant get this right 
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02/19/18

A 2.914g sample of gypsum,a hydrated salt of calcium sulphate,CaSO4,Is heated at a temperature greater than 17C in a crucible until a constant mass is reached.
The mass of anhydrous CaSO4 salt is 2.304 g . Calculate the percent by mass of water in hydrated calcium sulphate salt ???
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02/19/18

Cobalt(II) chloride is commonly obtained as a hydrate with the formular CoCl2•6H2O. An analysis showed that 25.0 grams of this hydrate contains 11.3g of water.
What is the percent water by weight in this hydrate ?          Need help 
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