CHEMISTRY (WEBWORK)

58,560 results, page 84

chemistry

which of the following molecules is polar? NO2 CO2 BF3 SF6 CCl4

Chemistry

what is the energy of a 606 nm photon emitted from a light source? Answer in units of J.

Chemistry

Just WHO IS DRBOB222? AND WHY ARE YOU SO AMAZING? PLEASE TELL US MORE ABOUT YOURSELF!

chemistry

how many grams of NaOH are contained in 250 mL of a 400 M sodium hydroxide solution

chemistry

how would you calculate the weight of percipitate of AgBr that will dissolve in 400 ml of water?

chemistry

1) DETERMINE pH of each of the following 2-component solutions. 0.08M RbOH & 0.130M NaHCO3

chemistry

The amount of indicator used in an acid-base titration must be small. why??

chemistry

Discuss the spontaneity of an electrochemical reaction in terms of its standard emf (E¨¬cell)

chemistry

Calculate the pH of the solution that results from the mixture. 170 mL of 0.12 M C2H5NH2 with 285.0 mL of 0.22 M C2H5NH3Cl.

chemistry

what is the stereochemical formula for water, pentane, ethanol, acetone, and methanol. please help!

chemistry

2L of 2M solute of HCI must be diluted to an 1M concentration. What will the final volume be after ?

Chemistry

What are the coefficent balance of this chemical equation H2SO4+NaNO2---->NHO2+Na2SO4?

Chemistry

a.Why is galvanizing a more effective form of rust production then painting or oiling?

chemistry

Calculate the density of an object having a mass of 17g and a volume of 3 cm cubed. Thanks

Chemistry

What mass of chloral hydrate (C2H3Cl3O2) would contain 1.0 grams of chlorine?

chemistry A.P.

write an expression for the quantity 506 00 in which it is clear that all zeros are significant

chemistry

how would you prepare 1L of a .5M solution of each of the following? Sodium carbonate from the pure solid

chemistry

to DrBob222 wouldn't it be like this then 4.86L/12.75kg*1000cm^3/1L*(1kg/1000g)^3

Chemistry

HSO4 + HCO3 -> SO4 + H2CO3 How would I know which are Bronsted-Lowry acids?

Chemistry

net ionic equation of Na2CO3+2HC2H3O2-->CO2+h2o+2Na2H3O2

Chemistry

Desribe differences and similarities of monosaccharides (ie. explain different forms of isomerism)

chemistry

write equations for the reactions of NaOH(aq) with solutions containing Al^3+ Cu^2+(aq),Pb^2+(aq) and Fe^3+(aq) ions respectively

chemistry

If a soda can is 11.8 cm tall, how many would it take to make a stack to reach the moon?

ap chemistry

2.70 g/cm3 to pounds per cubic foot could you please show me the steps

College Chemistry

When you bake cake batter it solidifies. Is this a physical or chemical change?

ap chemistry

how to alculate the molar amount of a compound used to neutralize a solution? pleassssssssss help!

Chemistry (11th)

Write the reaction for combustion of CH4 include the heat term.

chemistry

How many grams of na3po4 will be needed to produce 425ml of a solution that has a concentration of na+ ions of 1.30 M?

Chemistry

I'm completely confused on how to solve this problem. Convert 125 hp-hr/long ton to kW-s/kg.

Chemistry

I'm completely confused on how to solve this problem. Convert 125 hp-hr/long ton to kW-s/kg.

chemistry

What is composed of atoms in fixed proportions? A. mixtures B. compounds C. electrons D. elements

chemistry

What is the concentration of each type of ion on a 0.010 molar solution of Lithium sulfate (aq)?

Chemistry

Calculate the amount of heat required to raise the temperature of a 54 g sample of water from 5°C to 20.°C.

chemistry

what happens when sodium nitrate and copper hydroxide are heated in a boiling water?

Chemistry

How does a compound's properties compare to those of its component elements? Provide an example. I don't get this q.

chemistry

A sugar crystal contains approximately 1.7×10^17 sucrose (C12H22O11) molecules What is its mass in mg?

Chemistry

Find the volume in liters of 0.452 M manganese(II) sulfate that contains 54.5 g of solute?

chemistry

What mass of carbon dioxide is produced from the complete combustion of 8.20×10−3 g of methane?

chemistry

A sugar crystal contains approximately 1.7×10^17 sucrose (C12H22O11) molecules What is its mass in mg?

chemistry

what is the minimum number of electrons that would be expected to be in the valence shell of As in AsCl

Chemistry

Why is the expansion of air into a region of low pressure an endothermic proccess?

chemistry

What mass of protons would be required to just neutralize the charge of 2.7 g of electrons?

chemistry

How many {\rm NO}_{2} molecules would form as products if the reaction had a percent yield of 75\%?

Chemistry

what is the lewis structure with lowest formal charges and label the charge of each atom in NO

chemistry

Calculate the amount of heat required to raise the temperature of a 25 sample of water from 7 to 25.

Chemistry

Find the limiting reagent. 2 NH4 (g) + 4 CuO (s) ==> N2(g) + 4 Cu(s) + 4H2O (g) Please explain, thank you!

Chemistry

Find the limiting reagent. 2 NH4 (g) + 4 CuO (s) ==> N2(g) + 4 Cu(s) + 4H2O (g) Please explain, thank you!

Chemistry

What mass of protons would be required to just neutralize the charge of 1.5 g of electrons?

Chemistry 2

Which solution will have the lowest pH ? A. .10 M HCN B. .10 M HNO3 C. .10 M NaCL D. .10 M H2CO3 E. .10 M NaOH

chemistry

calculate the velocities of electrons with de Broglie wavelengths of 1.0x10^2nm and 1.0nm

Chemistry

Calculate the molality of CsCl in a 6% by mass aqueous solution. Answer in units of m.

Chemistry

If 100.0 J are added to 20.0 grams of water at 30.0 degrees Celsius. What will be the final temperature?

Chemistry

If 100.0 J are added to 20.0 grams of water at 30.0 degrees Celsius. What will be the final temperature?

Chemistry

What volume of a 0.600 M solution of AgClO4 is needed to produce 160g of AgCr04?

chemistry

What is the net ionic equation for chlorine ion and silver nitrate reagent?

chemistry

what is the net ionic equation for Na3PO4 + ZnSO4=Zn3(PO4)2+ Na2SO4

chemistry

In comparison ot milk sugar, what is the approximate molecular weight range of proteins?

Chemistry

consider a neutral atom with 69 protons and 80 neutrons what is the atomic number of this element

Chemistry

In respect to covalent bonding, what does it mean if there's an unshared or lone pair of electrons?

chemistry

what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)

chemistry

what would be the mass of an Au sample whose volume is 2.85mL?( the density of gold is 19.3g/mL)

Chemistry

What is the net ionic equation for the precipitation of nickel sulfide from aqueous solution.

chemistry

which is a chemical property? volume, mass, melting point, flammability or temperature?

chemistry

calculate the volume of .1M HCl that is required to react with 50 mL of .1M ammonia to form a mixture that has pH 9

AP Chemistry

how do you balance a redox equation like: Bi(NO3)3 + Al + NaOH = Bi + NH3 + NaAlO2 ??

Chemistry

How many milliliters of 0.135 M HCl are needed to completely neutralize 56.0 mL of 0.101 M Ba(OH)2 solution?

chemistry

what is the formula of the product form when CH3NH2 reacts eith hydrogen ion?

Chemistry

Rank the following Bronsted acids from strongest to weakest: H-SH H-CH3 H-NH2 H-F H-I

chemistry

how many moles of ions are released when 1.6 mol of ammonium phosphate is dissolved in water?

Chemistry

Name some advantages of using acetaminophen instead of aspirin as an analgesic

Chemistry

Calculate the molality of CsCl in a 18% by mass aqueous solution. Answer in units of m.

chemistry

Calculate the mass of KI in grams required to prepare 7.00 multiplied by 102 mL of a 2.60 M solution

college organic chemistry

Give the product of the substitution reactions. (CH3)2CHOSO3CH3 -> ?

chemistry

Fe(S)+ 2 HCl(ag) --> FeCL2(ag)+ H2(g What mass of H2 (g) is produced from the reaction of 5.2 Fe(s) with excess hydrochloric acid?

Chemistry

3.57×10−2 mol Ba Express your answer using three significant figures

Chemistry

What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?

Chemistry

What will be the final temperature if 2000g of copper at 95 degrees loses 10 kcal of heat?

Chemistry

How many milliliters of 6.0 M HCl would be needed if 3.000 g of K2CO3 were used in an experiment?

Chemistry

How many grams of KCl would be formed in the reaction of 3.000 g of K2CO3 and HCl?

chemistry

If the specific heat of a metal is 0.150 cal/g-deg, what is its approximate weight?

chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I don't know what to do

chemistry

Find the emf for the cell Cr(s) |Cr3+(aq, 0.37 M) || Pb2+(aq, 0.0095 M) | Pb(s). Answer in units of V I don't know what to do

Chemistry

Calculate the number of molecules in 3.1466x10^1 grams of sulfur dioxide, SO2

Chemistry

Calculate the number of molecules in 3.1466x10^1 grams of sulfur dioxide, SO2

Chemistry

5. The elements are related by properties in groups.- F? 7. In Earth's environment, hydrogen is a metal.- T? Thanks -MC

Chemistry

What is the dominant intermolecular forces for C2H5OC2H5 (diethyl ether)? Is it dispersion and polar?

chemistry

calculate the work done when 50.0g of tin dissolves in excess acid at 1.00 atm and 25 degrees c.

Chemistry

Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?

chemistry

Calculate the [H3O+] of the following polyprotic acid solution: 0.145 M H3C6H5O3?

chemistry

How many grams of calcium nitrate, Ca(NO3)2, are needed to make 100 mL of a .5 M solution?

chemistry

a 25.0 sample of nitrogen has a volume of 50.0L and a pressure of 630. mmHg. what is the temperature of the gas?

Chemistry

Concentration of OH- left in a solution made by mixing 16.0 g of NaOH and 80.0 mL of 0.170M HNO3?

Chemistry

The Ka values of H2CO3 are shown below. Ka1 4.6 10-7 Ka2 4.4 10-11 What is the pH of a 0.17 M solution of Na2CO3?

chemistry

How many grams of potassium fluoride are needed to make 250 mL of a 0.31 M solution in water?

chemistry

How many grams of potassium fluoride are needed to make 250 mL of a 0.31 M solution in water?

lab questions (chemistry)

why must not the condensed water drip into the flask?

Chemistry

Can anyone tell me why the answer that I got here is not correct? Pb(s) + AgNO3(aq) yields Ag(s) + PbNO3(s)

Chemistry

How many electrons in an atom can have each of the following quantum number or sublevel designations? 1. n = 4, l = 3

chemistry

How many moles of electron are transferred per mole of this reaction? 6Li + N2-> @Li3N

chemistry

What is the volume of 3.5 moles of oxygen gas (O2) at standard temperature and pressure (STP)

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