CHEMISTRY (WEBWORK)

58,560 results, page 99

Chemistry

Last one. Describe how you would prepare 100ml of a solution that is 22% acetic acid by volume?

CHEMISTRY HELP

NH3 + HCl --> can someone please finish that?? is it 2H2 + N2 + Cl or something? if so how would i balance it?

AP Chemistry

In the titration of 50.0 mL of 1.0 M CH3NH2 (kb=4.4 x 10^-4), with 0.50 M HCl, calculate the pH a) after 50.0 mL of 0.50 M has been added b) at the stoichiometric point.

chemistry

your reactants are two compounds composed of ions. what type of reaction do you probably have?

chemistry/science

Carbon tetrachloride, CCL4, is nonpolar. What force holds the molecules together?

chemistry

the formula: Ca(ClO3)2 --> CaCl2 + 3O2 what mass pf O2 results from the decomposition of 1.00 kg of calcium carbonate

Chemistry

What are the two half reactions for 3Mg+1Fe2(SO4)3 yields 3MgSO4+2Fe? thanks for your help

chemistry

hpw would i draw a lewis structure for a molecule with 3.5 bonds for example NO2???

chemistry

Define the term 'polymer' and then name two examples of naturally occurring polymers.

chemistry

If 20 g KCl is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

chemistry

If 20 g KCL is dissolved in 100g of water at 20 degrees C, is the solution unsaturated, saturated, or supersaturated?

Chemistry

how many electrons pairs surround an atom of boron (B,element 5) bonded in the compound BCI3?

Chemistry

Which of the following indicates the greatest pressure? A) 1 atm B) 777 torr C) 5.5 mm Hg D) 1000 Pa E) 12 psi

chemistry

hi can someone please help me I need a detailed scientific article about ozone depletion thank you

chemistry

450m/s to mi/h? 1km/1000m*1mi/1.690km = 3600 sec/1m 1617.3976mi/h?

Chemistry

How do I calculate how much sodium bicarbonate I need to neutralise 1L of 18M sulphuric acid?

Chemistry II

What is the molarity of a solution in which 13.7 g of calcium chloride is dissolved in water to a final volume of 750.0 mL?

Chemistry II

what is the molar mass of a gaseous organic compound with a density of 3.38 g/L at 40oC and a pressure of 1.97 atm?

Chemistry

What would be a chemically reasonable formula for a compound consisting of each of the following pairs of elements: (a) K and F (b) N and S

Chemistry

What would be a chemically reasonable formula for a compound consisting of each of the following pairs of elements: (a) K and F (b) N and S

Chemistry II

When dissolved in water, ammonium phosphate would have a value of __________ for i solute.

College Chemistry

How many electrons in an atom can have each of the following quantum number or sublevel designations? (a)n=2; l=1; m=0 (b)5s (c)n=4; l=1

chemistry

What are the different physical properties between HCl and NaCl? And explain the causes of their differences? THANKS

chemistry

What are the different physical properties between HCl and NaCl? And explain the causes of their differences?

CHEMiSTRY PLEASE HELP

What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth?

Chemistry

When 20.5g of methane and 45.0g of chlorine gas undergo a reaction that has a 75.0% yeild, what mass of chloromethane forms?

chemistry

What volume (in mL)of 0.0550 M calcium hydroxide is required to neutralize 38.00 mL of 0.0700 M nitric acid?

chemistry

The reaction of chlorine (Cl2) with 1,4-dimethylcyclohexane (show three possible monochlorination products) *what?!*

Chemistry

How many grams of CaH2 are needed to generate 54.5L of gas if the pressure of is 815 torr at 20C?

Chemistry

500 mL of water is added to 25 mL of 6.0 M hydrochloric acid. What is the final concentration of this solution in mol/L?

Chemistry

Consider the titration of 50.0 mL of 0.20 M NH3 (Kb = 1.8x10^-5) with 0.20 M HNO3. Calculate the pH after addition of 50.0 mL of the titrant.

chemistry

in response to DrBob, the textbook gives this equation for the problem. So if you could balance it as it is written, great!

Chemistry

After 0.6523 g of is heated, the residue has a mass of 0.3423 g. Calculate the % H2O in the hydrate.

chemistry

which has a higher inoization, phosphorus or sulfur? back-up your answer with an electron orbital dieagram for each

chemistry.

Write the symbols for three other species, which also have the electron arrangement of 2.8.

chemistry

how do you know what/which roman numeral to place between the cation and the anion of metal-nonmetal substances?

chemistry

how do you know which roman numeral to put between the cation and the anion of a metal-nonmetal substance?

Chemistry

What are complementary colors and how due different wavelengths of light affect the original color?

Chemistry

What are some different ways two water molecules could be positioned so that they stick together?

Chemistry

which metal does not require having its charge specified in the names of ionic comppounds it forms? a. Au b. Ca c. Cu d. Cr e. Fe

Chemistry (lab)

What are the units of retention time in gas liquid chromatography? Minutes or seconds?

chemistry

What number of electrons fit into energy levels higher than the third level?

chemistry

Is the protonated/acidic form of bromothymol blue more soluble in water or dichloromethane?

chemistry

Are the following quantum number combinations allowed? Else show any one way to correct them. a. n = 2, l = 0 m = -1 b. n = 4, l = 3 m = -1 c. n = 1, l = 0 m = 0 d. n = 3, l = 1 m = -2

chemistry

What salt is formed when sodium hydroxide is neutralized by perchloric acid? NaOH + HClO4 -> ?

Chemistry

I need some help to draw a Lewis structure for hydrogen cyanide + what is the noble gas?

chemistry

What are compounds that have the same molecular formula but different structural formulas called?

chemistry

How would you prepare 100.0 mL of 0.07500 M AgNO3 solution starting with pure solute?

Chemistry

if 8.50grams CH4 reacts with 15.9grams of oxygen gass which of the prdocut is the excess and which is the limiting.

chemistry

Given the plot of 1 vs 1ni2, what is the value of nf? y=-0.011x+0.0027 R^2=1 1/n(initial)^2=.04 1/lambda=.0023

chemistry

how ,many grams of aspirin are required to react exactly with 29.40ml of a 0.6M solution of sodium hydroxide

chemistry

how many molecules of calcium are needed to produce 90.87 moles of carbon dioxide? please explain.

chemistry

How many Ca +2 ions in 40.08g of CaCO3 (Calcium Carbonate) I'm unsure on how to approach this problem and set it up.

chemistry

if 200.g of water at 20 degrees celsius absorbs 41840 j of energy, what will its final temperature be?

chemistry

what type of intermolecular bonding would be expected between molecules of carbon monoxide and why?

Chemistry

What is the product of Bromo Blue, CaCl2 (calcuim cloride) and NaHCO3 (baking soda)?

organic chemistry

How many mols of benzoic acid are soluble in 125 mL of water at room temperature.

chemistry

what is the type of packing for body centered unit cell? i put A-B-A-B but my answer is wrong

chemistry

Determine the osmotic pressure (in psi) , at 75.0o F, of an aqueous solution that is 2.60 % sodium sulfate by mass

Chemistry

your reactants are an element and compound that is not not a hydro carbon. What type of reaction do you probably have??

chemistry

If 2500 ml container is filled with 175 grams of argon at -48 degrees celsius, what is the pressure?

chemistry

What is the original molarity of a solution of formic acid (HCOOH) whose pH is 3.74 at equilibrium? ka =1.7x10^-4

chemistry

Write the condensed structure for Methylpropyl ether Would it be C4H11O? CH3-O-CH3CH2CH3

chemistry

type of chemical reaction synthesis, decomposition, double or single K+B2O3=K2O+B

Chemistry

Which measuring device would you use if you needed to know the volume of a liquid very precisely?Why?

chemistry

What is the formula mass, in amu, of KNaC4H4O6·4H2O? Be sure to include the water molecules

chemistry

What would be happening in this reaction? 2Ag^+(aq) + CO3^2-(aq) + HNO3 (aq) -----> 2AgNO3(s) + H20(l) + CO2(aq)

CHEMISTRY

Need to draw electron dot diagram showing the covalent bond PCL3

Chemistry

What is the maximum mass of product that can be formed when 76.0 g of solid zinc and 17.5 g nitrogen gas react?

chemistry

HCl + Zn --> Predict the products and decide if it occurs. I have the activity series, but there's only H2 on there, not H.

Chemistry

Balance the following equations. A) SO2 + O2 --> SO3 B)Fe2O3 + H2 --> Fe +H2O C)P + O2 -->P4O10 D)Al + N2 --> AlN

college chemistry

how much solute is needed to prepare 450ml of a 2.0% (m/v) potassium chloride solution?

chemistry

calculate the volume of 0.1M NaOH which must be added to 50 mL of 0.1M HCl to give a final solution of pH 6???

chemistry

120 ml of oxygen is collected at 27degrees C and 740 torr pressure.What is the volume at STP?

Chemistry-Equation

How many moles of glucose, C6H12O6, can be "burned" biologically when 10.0 mol of oxygen is available?

chemistry

When silver nitrate reacts with hydrochloric acid, what type of reaction takes place

chemistry

how much ethyl alcohol must be added to 1.00l of water so that the solution will not freeze at -4f

chemistry

How much ethyl alcohol (C2H5OH) must be added to 1.00 L of water so that the solution will not freeze at -4°F?

chemistry

Br is larger than Cl,yet the two atoms have identical axial destabilization energies. Why?

chemistry

What is the value of [HCO3- ]/PCO2 for someone with mild acidosis, with a blood pH of 7.30? 1. 0.038 2. 0.38 3. 0.030 4. 0.30 5. 3.0

Chemistry

What will be the [Cl-] when equal volumes of 0.10MNaCl and 0.20MAlCl3 are combined? A. 0.35M B. 0.15M C. 0.30M D. 0.70M

CHEMiSTRY

what is the relationship between the pressure of a gas and the absolute temperature when the volume is kept constant ?

Chemistry

If 16.9 kJ are released when 1.50 g of O2 reacts with an excess of NO, complete the thermochemical equation below. 4 NO(g) + 3 O2(g) 2 N2O5(g) ÄHrxn=???

Chemistry

Calculate the pH at 298K of solutions having the following ion concentrations? A. [H+]=1.0 x 10^-4M B. [H+]=5.8 X 10^-11M for A do you subtract 1.0 X 10^-14 from H+]=1.0 x 10^-4M

Chemistry

CO(h20)6 2+ + 4Cl- <=> CoCl4 2- + 6H20 What would AgNO3 do when added to this? What is the equilibrium expression?

Chemistry

CO(h20)6 2+ + 4Cl- <=> CoCl4 2- + 6H20 What would AgNO3 do when added to this? What is the equilibrium expression?

Chemistry

What is the wavelength of radiation that has a frequency of 5.8 X 10^12 s-1? I keep getting 5.17e19 but it keeps saying that's wrong. Help!

Chemistry

How many kilograms of red iron oxide can be obtained from 1.00kg ferrous sulfate heptahydrate?

Chemistry

Complete and balance this equation for a combination reaction. Be + O2 ==> Would it be Be + O2 ==> BeO2 ? or... 2Be + O2 ==> 2BeO ? Why??

Chemistry

2NaHCO3 + H2SO4 ->Na2SO4 + 2H2O + 2CO2 Can u tell me physical states of the equation?

Chemistry

C9H20 + 19/2O2 -> 9CO2 + 10H2O Please Can u find the physical states for this equation?

Chemistry

Write a balanced chemical equation for each single replacement reaction. A) Au(s) + KNO3(aq) ==> ??? B) Al(s) + H2SO4(aq) ==> ???

Chemistry

What volume of 0.025 M sodium bromide, NaBr, contains 2.0 ´ 10-4 mole of Br-? a. 0.040 L b. 0.080 L c. 4.0 mL d. 8.0 mL e. 16 mL

Chemistry

If PbF2 is poured into a solution of 0.012 molar F-, how much will dissolve at equilibrium?

Chemistry

How many moles of air are there in flask with a volume of 125mL if the pressure is 745 mm Hg and the temperature is 22 celcius ?

chemistry

identify the atoms that are being oxidized and reduced.. 2FeCl3 + 2KI --> 2FeCl2 + 2KCl + I2

chemistry!

how many moles of product are formed in the reaction? 2Al(s),3Cl2(g)--->2AlCl3(s) please help me!! thank you so much

chemistry

How many joules of heat would be required to completely melt 5.00 grams of H2O (s) at 0C to H20 (l) at 0C

Chemistry

how much heat is required to vaporize 343 g of liquid ethanol at its boiling point?

Chemistry

How can you tell if [ MnCl6]4- or [ Mn(CN)6 ] 4- has the longer wavelength of light? and then how do you figure out how many unpaired electrons each has?

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