CHEMISTRY (WEBWORK)

58,868 results, page 89

chemistry

the amount of heat when 65g of water at 100c until it cools to 37c

chemistry

will KCl conduct more electricity than AlCl3 because K has less ionization energy than Al?

chemistry

write a balanced chemical reaction representing the combustion of hexane? C6H14

Chemistry

On the basis of MOT, explain why the stability of N2 decreases on ionization but the inverse is true for O2.

chemistry

If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?

chemistry

If you burn 38.9 g of hydrogen and produce 348 g of water, how much oxygen is reacted?

Chemistry

A sample of 50.0 mL if sulfuric acid that has a density of 1.84 g/mL would have a mass of how many grams?

chemistry

if we combust 4.23 x 10^24 molecules of propane how many grams of carbon dioxide and water you will produce ?

chemistry

What mass of carbon dioxide is produced from the complete combustion of 2.50×10−3 of methane?

Chemistry

How much water, in grams, can be made from 3.59 × 10^24 hydrogen molecules? Answer in units of g

chemistry

how many seconds would it take to go from 0mi/h to 60 mi/h with an average acceleration of 15mi/h squared

Chemistry

If water is synthesized how much hydrogen would be needed to make 10.0 grams?

Chemistry

At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)

Chemistry

A student mixes 45.0 ml of .150 M HCL with 30.0 ml of .200 M NaOH. What is the pH of the resulting solution?

Chemistry

How much 0.5 M HCl is needed to neutralize 5.5 kg of ammonia dissolved in 6 gal of water?

chemistry

Convert .25 L of a .025 M solution of NaCL starting with solid NaCI and water

chemistry

Determine the volume of a 0.550 M KMnO4 solution required to completely react with 2.80 g of Zn.

chemistry

Calculate the grams of K2CO3 required to prepare 546.0 mL of a 0.789 g/L K+ solution.

chemistry

what volume of butyric acid would be needed to make 25.0mL of a 1.0M solution?

chemistry

what is the vapour pressure in mm of Hg of nickel nitrate solution at 125 degree centigrade

chemistry

Determine the volume of a 0.550M of kmno4 solution required to completely react with 2.70 of zn

chemistry

calculate the theoretical weight of sodium borohydride need to reduce 50 mg of benzil

chemistry

3Ag(s)+4HNO3(aq)-->3AgNO3(aq)+NO(g)+2H2O(l) Write the new ionic equation.

Chemistry

3Ag(s)+4HNO3(aq)-->3AgNO3(aq)+NO(g)+2H2O(l) Write the net ionic equation.

chemistry

An element x has 3 isotopes,a,b,c.a has 5% abundance b,20%,c,75% &a has a mas of 40,b 42,c 45.what is the essntial differnce in the nuclear structure.

lang

A science that looks at atmosphere and the weather. A. Chemistry B. Meteorology C. Geology D. Astronomy d

Chemistry

How do you calculate the mass in kilograms of 3.99 liters of acetic acid. The density of this substance is 1.05 g/mL.

Chemistry 100 Lab

What will be the color of copper II oxide when heated in the presence of hydrogen?

Chemistry

Ba(NO3)2 is added (BaCrO4 (s) is less soluble than BaCr2O7 (S)) provide an explanation Thank You

chemistry

calculate the mass in kilograms of 3.99 liters of acetic acid. the density if 1.05g/ml.

CHEMISTRY

Find the amount of CuSO4.5H2O needed to prepare 500 mL of 0.25 M solution.

chemistry

Calculate the concentration in ppm if 8 grams of CaCl2 is dissolved in 250 ml of water.

Chemistry

Using the "octet rule" write the Lewis formulas for NF3 and NO3-.

Organic Chemistry

Do these two names refer to the same compound: N-butylcyclohexylamine vs N-butylcyclohexanamine?

Chemistry

In basic solution, H2O2 oxidizes Cr+3 to Cro4^-2 and is reduced to OH-. What is the balanced equation?

Chemistry

How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?

Chemistry

How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?

Chemistry

How many liters of chlorine gas can be produced when 0.98 L of HCl react with excess O2 at STP?

Chemistry

How many grams of carbon dioxide are produced in C3H8+5O2 -> 3CO2+4H2O

Chemistry

What mass of HNO3 is present in 248.6 mL of a nitric acid solution having a pH = 5.04?

Chemistry

If the percent yield was 81.5%, how many grams of aluminum were used to prepare 20.0 g of potassium alum?

chemistry

If 2.0 mL of 0.80M copper (II) sulfate and 8.0 mL of water are mixed, what is the concentration of the resulting solution?

ap chemistry

what volume of 0.0100 M NaOH must be added to 1.00 L of 0.0500 M HOCl to acheive a PH of 8.00?

chemistry

Current is applied to an aqueous solution of lithium sulfide. What is the cathode and what is the anode?

chemistry

2. Aluminum chloride was a product in step 6. How could you instruct your lab partner to recover it.

chemistry

write the conjugate base for the following: A.) HCN= B.) HPO4^2- = C.) NH4+ = D.) HC2H3O2=

chemistry

DrBob222 No. 0.30 isn't the correct answer either. I'm going to ask my prof about it tomorrow.

Chemistry

How many moles of nitric acid will be produced when .51 mole of dinitrogen pentoxide reacts

chemistry

2. Aluminum chloride was a product in step 6. How could you instruct your lab partner to recover it.

Chemistry

What is the concentration of the SCN- ion in the stock solution of 2.00 x 10-3 M NaSCN in 0.10M HNO3?

Chemistry

Why was gravity filtration used instead of evaporation to isolate the calcium cabornate?

Chemistry

Is there any periodicity in the maximumm oxidation number for elements 11 through 17? If so, explain your answer.

Chemistry

Calculate the equivalent mass of each of the following acids. a) HC2H3O2 b) KHCO3 c) H2SO3

AP CHEMISTRY

Calculate the equivalent mass of each of the following acids. a) HC2H3O2 b) KHCO3 c) H2SO3

Chemistry

what is the chemical equation of copper II oxide and carbon monoxide (include phases)?

chemistry

If you have 2 moles of glucose in 8 liters of solution, what is the molarfity of this sol;ution?

chemistry

solve under rate of reaction: 1)Mno4^- + Fe2^+=Mn2^+ + Fe3^+

chemistry

solve under rate of reaction: 1)Mno4^- + Fe2^+=Mn2^+ + Fe3^+

chemistry

solve under rate of reaction: 1)Mno4^- + Fe2^+=Mn2^+ + Fe3^+

Chemistry

3.54*10^7 g of TiCl4(g) are reacted completely. If 7.91*10^6 g of Ti(s) is actually obtained, calculate the percent yield.

chemistry

ewhat is the solubility of X in mol/dm3 if 25cm3 of its saturated solution contains 4.0g of X

chemistry

how does the number of electron pairs around a central atom determines its shape

Chemistry honors

You have 2.657 x 10^2 mL of oxygen gas (O2) at 7.02 x 10^2 mm of Hg and 46 oC. What is the mass of the sample in milligrams?

Chemistry

At constant pressure, which of these systems do work on the surroundings? Check all that apply. A(s) + 2B(g) ---> C(g) 2A(g) + B(g) ---> 4C(g) A(g) + 2B(g) ---> 2C(g) A(s) + B(s) ---> C(g)

Chemistry

How many mL of .150 M sodium hydroxide is required to neutralize 25 mL of .125 M of phosphoric acid?

chemistry

which is the best salt to use to melt ice without any side effects

chemistry

which is the best salt to use to melt ice without any side effects

Chemistry

What is the density of CO2 at STP in g/L? How would I do this problem using dimensional analysis?

chemistry

Determine the mass of Co(NO3)2•6 H2O to prepare 250 mL of a 0.50 M stock solution.

chemistry

how much concentrated 12 M hydrochloric acid is needed to prepare 100 mL of a 2.0 M solution?

Chemistry

How many grams of H2(g) can theoretically be produced from a 5-g sample of magnesium metal and excess HCl(aq)?

Chemistry

What would the IUPAC name of the molecule: H2C=C=CH2 be? is 1,2-propene right?

chemistry

please help calculate the volume of a cylinder that is 4.476 mm in height and 17.00mm in diameter

chemistry

Based on electronegativity values, which bond has the highest degree of ionic character: H--S Si--Cl Cs--Br?

chemistry

How does Le Chatelier's principle explain the result you obtained after the addition of NaOH?

Chemistry

Calculate the molality of a solution prepared by dissolving 31.6 g of Fe2O3 in 750. g of water

Chemistry PLZ HELP!!!!!

distinguish between aorphous and crystalline soilds and give an example of each

Chemistry

What is the volume occupied by 12.3 g or argon gas at a pressure of 1.17 atm and a temperature of 455K?

Chemistry

16. You have a series of four chemical reactions (1--> 2 --> 3 --> 4). How do you calculate the H2 if you know the other H values? H2 = (H1)(H3)/(H4) H2 = H4 (H1 + H3) H2 = H1 + H3 + H4 H2 = H1 + H3 H4

Chemistry

What 3 compunds can be used to prepare oxygen in the laboratory? What are the reactions for each of the three compounds?

chemistry

What volume will 12.0 g of oxygen gas occupy at 25 degrees celcius and a pressure of 52.7 kPa?

Chemistry

What amperage is required to plate out .250 mol Cr from a Cr+3 solution in a period of 8.00 h?

Chemistry

Is an endothermic reaction more likely to be spontaneous at a higher or lower temperature??

Chemistry

How much limestone in kilograms is required to completely neutralize a 3.8 x 109 L lake with a pH of 5.5?

chemistry

why would it be undesirable to wash the crude halide with aqueous sodium hydroxide

CHEMISTRY

WHAT IS THE COST PER KJ TO PRODUCE METHANOL, ETHANOL, PARIFFIN, PROPANOL,AND BUTANOL?

chemistry

At what temperature does 14.2 g of nitrogen gas have a pressure of 3.25 atm in a 14.0 liter tank?

Analytical Chemistry

How many millimoles and molecules of solute are in 500 ml of a solution that is 5.41 ppm KMnO4?

chemistry

With the aid of chemical equation only describe how butane can be converted to but-2-ene

chemistry

How much heat (in Kj ) is required to warm 10.0g  of ice, initially at -11.0 C, to steam at 112.0 C?

Chemistry

How much heat (in Kj ) is required to warm 10.0g  of ice, initially at -11.0 C, to steam at 112.0 C?

chemistry

3CaCl2+2Na3PO4 -----------> 1Ca3(PO4)2+6NaCl Did I correctly balance this equation?

Chemistry

What is the compound name for Sb2(CrO4)5? This is the only question I am having trouble with.

chemistry

which liquids are effected by an electric field and why 1-chloropropane, pentane, tetrachloromethane, cyclopentane

chemistry

How many moles of a gas will occupy a volume of 0.53 L at a temperature of 343 K and a pressure of 2.6 atm ?

chemistry

what is the change in heat when 23.5g water vapor at 100C condenses to liquid 18.50C

chemistry

N2+2H2=N2H4 What is the concentration of H2 at equalibrium when (N2)=.033 and (N2H2)= .042 M? Keq=5.29

Chemistry

What is the [CrO4] in a 2.5 L saturated solution of lead (II) chromate to which 0.05 mol Pb(NO3)2 is added?

chemistry

how many grams of NaOH would be needed to make 896mL of a 139 M solution

Chemistry

What is the molarity of a solution prepared by dissolving 4.92 g of calicum nitrate in 250 mL of water?

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