Chemistry

chemistry
Does N2O violates the octet rule?

Chemistry
Which is the strongest interparticle force present in a sample of H3PO4? ion―dipole forces dipole―induced dipole forces hydrogen bonding forces ionic bonding forces ion―induced dipole forces dispersion forces dipole―dipole forces

Chemistry
What is the chemical equation for solid aluminum reacts w/ solid iodine to produce solid aluminum iodide?

chemistry
Does N2O violates the octet rule?

chemistry
DOES NO-3 VIOLATES OCTET RULE ?

Chemistry
In a solution of .200M NaI, solid AgI was placed in. Calculate the solubility if AgI (Ksp=1.5*10^-16)

Chemistry
The volume of a balloon is 1 liter at 1 atm pressure and 0°C temperature. What volume is the ballooon at 2 atm pressure and 273°C temperature?

Chemistry
Calculate the volume of 1.86M Na3PO4 solution that can be prepared from 5.45 g of Na3PO4

chemistry
The normal boiling point of liquid butanol is 391 K. Assuming that its molar heat of vaporization is constant at 45.9 kJ/mol, the boiling point of C4H9OH when the external pressure is 0.647 atm is

Chemistry
Consider separate 1.0-L samples of He (g) and UF6 (g), both at 1.00 atm and containing the same number of moles. What ratio of temperatures for the two samples would produce the same root mean square velocity? T UF6/T He= x/1.0

Chemistry
Ca(OH)2 has a Ksp of 6.5×10−6. If 0.370 g of Ca(OH)2 is added to 500 mL of water and the mixture is allowed to come to equilibrium, will the solution be saturated?

ChEmIsTrY
Alpha rays are really a. electrons b. helium nuclei c. electromagnetic waves I think the answer is B because the alpha particle is a helium nucleus. But I'm confused because if the alpha PARTICLE is a helium nucleus, would alpha RAYS be helium nuclei? Please explain.

Chemistry
Road map in chemistry ?

Chemistry
A 0.3146-g sample of a mixture of NaCl(s) and KBr(s) was dissolved in water. The resulting solution required 37.20 mL of 0.08765 M AgNO3(aq) to precipitate the Cl–(aq) and Br–(aq) as AgCl(s) and AgBr(s). Calculate the mass percentage of NaCl(s) in the mixture.

Chemistry
If the concentration of I^-1 is found to be 2.4x10^-3 mol/L in a saturated solution of PbI2, what is the Ksp of PbI2? The given answer is 6.9x10^-9

Chemistry
A 1.80-g sample of water contains _____ mole(s) of hydrogen atoms.

Chemistry
Is a mole of marshmallows is 6.022 X 10^23 true or false? I think it is false but I'm not sure.

CHEMISTRY
Exactly 3.0 mol NO and 2.0 mol O2 were placed in a 1.00-L flask. These gases react as follows: 2 NO + O2 2 NO2 . At equilibrium, the mixture contained 2.0 mol NO2. What is the Kc for the reaction above? A 0.50 B 1.00 C 2.0 D 2.5 E 4.0

College Chemistry
Please help I have no idea how to do this. There are three different dichloroethylenes (molecular formulaC2H2Cl2), which we can designate X, Y, and Z. Compound X has no dipole moment, but compound Z does. Compounds X and Z each combine with hydrogen to give the same product: ...

Chemistry
Please help I have no idea how to do this. There are three different dichloroethylenes (molecular formulaC2H2Cl2), which we can designate X, Y, and Z. Compound X has no dipole moment, but compound Z does. Compounds X and Z each combine with hydrogen to give the same product: ...

Chemistry
Blueprint paper can be made by soaking paper in a brown solution of Fe(CN)6^3- and iron (III) ammonium citrate. Wherever the paper is exposed to bright light, the paper turns blue. Explain why this happens.

Chemistry
1. I am making holiday cookies and the recipe says that it will make 48 cookies. After eating some raw cookie dough I bake the remainder into cookies and am able to make 44 cookies. what is the percent yield?

Chemistry
you reacted magnesium with a hydrochloric acid aqueous solution and hydrogen gas was produced. Let's say that you collected the gas given off by the reaction and measured it's pressure as 102.1 kPa. If the vapor pressure of water is 16.2 kPa at this temperature, then what is ...

Chemistry
(I corrected it ) 1. Sodium and water react according to the following equation. If 31.5g of sodium are added to excess water, how many liters of hydrogen gas are formed at STP? 2Na+2H2O—>2NaOH+H2 My work: For #1 Na would have 2 moles and H would have 1? Make 31.5g x 2/1=...

Chemistry
In my titration method it says trial titration. In my table it says rough titration. I know the meaning of both. But, are they the same thing and could i say my first titration rough value is both the trial titration and rough titration?

Chemistry
PART A) Suppose that 6.9 mL of 2.5 M KOH(aq) is transferred to a 250 mL volumetric flask and diluted to the mark. It was found that 32.8 mL of this diluted solution was needed to reach the stoichiometric point in a titration of 6.9 mL of a phosphoric acid solution according to...

chemistry
Calculate the mass CaCl2 · 6 H2O needed to prepare of 0.123 m CaCl2(aq), by using 373 g of water. Answer in units of g.

CHEMISTRY
1. Give reasons for your choice. 2. Give reasons for rejecting other options 6. In a chemical reaction at constant temperature, the addition of a catalyst A increases the value of the equilibrium constant. B increases the fraction of molecules with more than a given kinetic ...

CHEMISTRY
1. Give reasons for your choice. 2. Give reasons for rejecting other options. The reaction C(s) + O2(g) CO2(g) + heat reaches equilibrium in a closed reaction vessel. Which one of the following actions causes the equilibrium to shift to the right ? A increasing the volume of ...

chemistry
Calculate the mass CaCl2 · 6 H2O needed to prepare of 0.123 m CaCl2(aq), by using 373 g of water. Answer in units of g.

chemistry
A solution prepared by adding 0.17 g of a polymer to 0.6 L of toluene (methylbenzene, a common solvent) showed an osmotic pressure of 0.808 Torr at 21â—¦C. What is the molar mass of the polymer? Answer in units of g/mol.

Chemistry
How many molecules are there in 6.8 grams of CO2

Chemistry
What is the freezing point of a solution that contains 3.5 mol of the ionic solid BaCl2 dissolved in 500 grams of water?

Chemistry
How many copper atoms are in a pure copper statue with a mass of 200 kg ?

Chemistry
How do I find the rate law? I did a iodine clock lab but i am having trouble finding the rate law equation as well as the slow and fast reactions. I used these materials: Solution 1 o 1.0 grams Starch o 10.0 mL of Acetic Acid o 4.1 grams of Sodium Acetate o Sodium Iodide 1, 2...

Chemistry
The amino acid glycine, C2H5NO2, is one of the compounds used by the body to make proteins. The equation for its combustion is 4C2H5NO2(s) + 9O2(g) -------------> 8CO2(g) + 10H2O(l) + 2N2(g) For each mole of glycine that burns, 973.49 kJ of heat is liberated. Use this ...

Chemistry
Calculate the molar enthalpy of reaction per mole of carbon in the following reaction: 3 C(s) + 2 Fe2O3(s) + 466 kJ c12-u3_files/i0210000.jpg 4 Fe(s) + 3 CO2(g) a. +466 kJ/mol C b. +155 kJ/mol C c. +117 kJ/mol C d. –466 kJ/mol C e. –155 kJ/mol C

chemistry
the sum of the masses of individual nuclear particles is less than their masses when combined. true or false?

General Chemistry
Liquid Freon (CCl2F2) is used as a refrigerant. It is circulated inside the cooling coils of older refrigerators or freezers. As it evaporates, it absorbs heat. How much heat can be removed by 2.00 kg of Freon as it evaporates inside the coils of a refrigerator? The heat of ...

chemistry
The heat of combustion for 1 mole of carbon to carbon dioxide is -410 kJ. How many kJ of heat would be liberated from the complete combustion of 60.0 g of carbon?

Chemistry
Good morning. I need help solving 2 problems for chemistry. For #1 I need someone to check my work and tell me if I did it wrong and show me how and where I went wrong. And for #2 I need someone to help me figure out how to solve it and explain. 1. With the balanced equation ...

chemistry
Calculate the flask filled with stop cock is evacuated and weight its mean is found to be 134.567 it is them filled to a pressure of 735 mm at31c with is of UN non molecular mass and then the flask the filled with water and weight again its mass is now 1067.9g a summary that ...

General Chemistry
A 1.50 rubber balloon balloon is filled with carbon dioxide gas at a temperature of 0.00 degrees celsius and a pressure at 1.00 atm. The density of carbon dioxide under these conditions are 1.98 g/L. At 50.0 degrees celsius, the balloon has a volume of 1.78 L. Calculate the ...

chemistry
When molecular oxygen (O2) is converted to water (H2O). Is O2 being oxidized or reduced.

Chemistry
In the following reaction, first find how many oxygen molecules would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? Then, if exactly 1.505x10^21 carbon dioxide molecules were formed in this reaction, calculate the grams of water formed during this ...

Chemistry
In the following reaction, first find how many oxygen molecules would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? Then, if exactly 1.505x10^21 carbon dioxide molecules were formed in this reaction, calculate the grams of water formed during this ...

Chemistry
In the following reaction, first find how many oxygen molecules would be used to completely react with 230 grams of pentyl alcohol (C5H11OH)? Then, if exactly 1.505x10^21 carbon dioxide molecules were formed in this reaction, calculate the grams of water formed during this ...

Chemistry
How many grams of dichloromethane are formed from 1500.0 grams of methane, it the percent yield for the reaction is 82.5%?

Chemistry
1)Scientific mechanism behind lipid oxidation 2) How metal ions and light affect lipid oxidation

chemistry
What is the molar mass of an acid if 0.422 g of the acid are neutralized by 17.5 mL of 0.268 M NaOH?

Chemistry
List and describe three factors that influence solubility. Would the answers be increased agitation, heating the solution, and increasing the surface area of the solute?

Chemistry 101
Determine the mass aluminum chloride , alcl3 produced when 112.3 g of chloride gas, cl2 is used

PRACTICAL CHEMISTRY
REDOX balancing reaction Cr2O7 + NO-2 Cr3+ + NO3 (acid medium)

Chemistry
What are some potential pitfalls of using copper to restore the green color of chlorophyll that is lost during the processing of plant foods?

Chemistry
Write the element symbol and charge for this monatomic ion: Consider a monatomic ion that has the electron configuration of [Kr]4d^10 5s^2 and a charge of 2+

Chemistry
-Calcium chloride contains calcium and chloride ions. Write the ground-state electron configuration for the calcium ion. -Write the ground-state electron configuration for the chloride ion.

Chemistry
A calorimeter, with calorimeter constant 7.31 J K–1, was used to measure the heat of reaction for mixing 100.0 mL of 0.100 M Ag+ with 100.0 mL of 0.100 M Cl–. The temperature change was +0.770 K for the 200.0 g of solution (specific heat capacity = 4.35 J K–1g–1, ...

Chemistry
At 20.0°C the vapour pressure of pure methanol is 11.8 kPa and that of pure ethanol is 5.93 kPa. A gaseous mixture of methanol and ethanol is cooled and compressed until the first drops of liquid form at 20.0°C and a total pressure of 10.0 kPa. Assuming the liquid mixture ...

chemistry
Air consists of 21 % oxygen, 78 % nitrogen and 1 % argon by volume. Calculate: * (a)  the partial pressures in Pa, if total pressure is 1 atm, 
 * (b)  the concentration in mol m–3, of each gas at 273 K, 
 * (c)  the average molar mass of air, 
 * (d)  the number ...

Chemistry
High quality coal (anthracite) is almost pure carbon. The combustion of carbon to carbon dioxide releases 393 kJ per mol of carbon burnt. If 1.000 kg of anthracite is burnt: (i) How much heat is released? (ii) How much ice (in kg) at 273 K could be melted to give water at 273 ...

Chemistry
If you have 2.2x10^24 molecules of O2 at STP, how many liters of O2 do you have? Can someone show me how to solve this

Chemistry
Sulfur dioxide reacts with oxygen to form sulfur trioxide according to the equation 2SO2(g) + O2(g) <-> 2SO3(g) Samples of sulfur dioxide, oxygen, and sulfur trioxide were added to a flask of volume 1.40 dm^3 and allowed to reach equilibrium at a given temperature. The ...

CHEMISTRY
This question is from grade 12 university preparation level. The answer has to do something with rates of chemical reactions but I don't know what the answer is. . When hydrogen peroxide H2O2 is used as an antiseptic on open wounds, bubbles form as a result of the following ...

Chemistry
When one mole of ammonia is heated to a given temperature, 50% of the compound dissociates and the following equilibrium is establised. NH3(g) <-> 1/2N2(g) + 3/2H2(g) (note: <-> is my sad attempt at the equilibrium symbol) What is the total number of moles of gas ...

Chemistry!HELP
32.12mL of 10.0 mol/l potassium chromate solution is reacted with 120.0m of 2.00mol/l lead (II) nitrate solution. The balanced equation is; 2KCrO4(aq)+Pb(NO3)2(aq)==>2KNO3(aq)+P​b(CrO4)2(s) a. Determine the limiting reactant b. What is the maximum mass, in grams, of ...

Chemistry
Suppose that 2.00mL of 0.02 mol/L aqueous sodium sulphide, Na2S is used to test a 60.0mL sample of water containing 0.0004 mol/L mecury (II) nitrate Hg(NO3)2, ions. a. Write the balanced equation Hg(NO3)2 + Na2S = HgS + 2NaNO3 b. Determine the limiting reactant Na2S = 2.00mL/...

Chemistry
Is there a chemistry teacher for jiskha? Or someone that knows what my teacher is talking about? :’( He wants me to: Calculate the number of moles of CO2 in 63.0g of CO2

Chemistry
For the reaction 2CO2(g) + 5H2(g)C2H2(g) + 4H2O(g) H° = 46.5 kJ and S° = -124.8 J/K The standard free energy change for the reaction of 1.75 moles of CO2(g) at 328 K, 1 atm would be ___ kJ This reaction is (reactant, product) ____ favored under standard conditions at 328 K. ...

Chemistry
A sample of hydrogen gas at a pressure of 0.694 atm and a temperature of 271 °C, occupies a volume of 417 mL. If the gas is heated at constant pressure until its volume is 626 mL, the temperature of the gas sample in °C will be? I got 407 °C but it says that is incorrect. ...

Chemistry
A person accidentally swallows a drop of liquid oxygen, O2 (l), which has a density of 1.149 g/mL. Assuming the drop has a volume of 0.050 mL, what volume (mL) of gas will be produced in the person’s stomach at body temperature (37 °C) and a pressure of 1.0 atm?

CHEMISTRY
Estimate the enthalpy of combustion of methane in kJ.mol^-1 CH4(g) + 2O2(g) ------> CO2(g) + 2H2O(g) Bond Dissociation Enthalpies /kJ.mol^-1 Single Bonds Double Bonds C C 350 C O 732 C H 410 O O 498 O H 460 C O 350 O O 180 A. 668 B. 540 C. –540 D. –668 (CORRECT ANSWER) ...

Chemistry
This question is from grade 12 university preparation level. The answer has to do something with rates of chemical reactions but I don't know what the answer is. . When hydrogen peroxide H2O2 is used as an antiseptic on open wounds, bubbles form as a result of the following ...

Chemistry
Given the balanced equation, calculate the mass of product that can be prepared from 1.10 g of zinc metal. 2Zn(s)+O2(g)→2ZnO(s) How to solve? Thanks.

chemistry
Assuming all gases are at the same temperature and pressure, how many milliliters of hydrogen iodide are produced from 165 mL of H2? H2(g)+I2(g)→2HI(g)

Chemistry
Consider the following compounds: KF, NaF, and RbCl. Answer the following questions based on expected periodic trends: (a) Which is expected to have the shortest ionic bonds? (b) Which is expected to have the highest lattice energy? (c) Which is expected to have the lowest ...

Chemistry
So;Arrange the following species in order of decre asing S-O bond strength (strongest first, weakest last). SO, SO 3 2– , SO 3 , SO 2 I got SO2, sO32-, SO3, SO. Any ideas

college chemistry
if co2 were soluble in h2o, how would that affect the calculated value for molecular mass of the co2?

Chemistry
What is saponification (soap making) ?

Chemistry
What mass of ammonia (NH3), is necessary to react with 2.1 x 1024 molecules of O2? 4 NH3 + 7 O2 = 6 H2O + 4 NO2?

CHEMISTRY
The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of 24.5oC was ...

Chemistry
Two molecules of hydrogen react with one molecule of oxygen to produce two molecules of water. How many molecules of water are produced from 2.0 x 1023molecules of oxygen? How many moles of water are produced from 22.5 moles of oxygen?

Chemistry
How many liters of oxygen are required to react completely with 2.4 liters of hydrogen to form water? H2 + O2--> H2O?

Chemistry
Ca+N-->Ca3N2 -What is limiting reagent? -Mass of calcium nitride formed when 50.0g of calcium reacts with 50.0g of Nitrogen? -Excess? CAN SOMEONE DOUBLE CHECK MY ANSWERS: Calcium is limiting reagent. Mass of Ca3N2: 68.4g Ca3N2 Excess: 38.4N left over.

Chemistry
The heat evolved in the reaction of hydrobromic acid with potassium hydroxide was determined using a coffee coup calorimeter. The equation for the reaction is: HBr(aq) + KOH(aq) -------------> KBr(aq) + H2O(l) When 25.0 mL of 1.00 M HBr at a temperature of 24.5oC was ...

Chemistry
Liquid methylene iodide has a density of 3.33 g/mL. A barometer is constructed using methylene iodide instead of mercury. If the atmospheric pressure is 0.951 atm, what is the height of the methylene iodide column in the barometer in cm? The density of liquid mercury is 13.6 g/mL

Chemistry
A student prepared a 0.03M solution of formic acid (HCHO2) and measured its PH at 25oc and it was found to be 4.67. Calculate Ka for formic acid at this temperature.what percentage of the acid is ionized in this 0.03M solution.

Chemistry
The approximate concentration of hydrochloric acid, in the stomach is 0.17M .calculate the mass of the following antacids required to neutralize 50mL of this acid; 1.) bicarbonate of soda, NaHCO3 2.) aluminum hydroxide, Al(OH)3

Chemistry
How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron configurations for bonds to H...

Chemistry
Why are some solutes soluble in water, but others are soluble in cyclohexane?

chemistry
3. If 15.0 mL of a 1.5M HCl solution at 21.50C is mixed with 25.0mL of a 1.5M NaOH solution at 21.50C that is in a calorimeter, and the final mixed solution temperature rises to 28.50C, what is the ΔHrxn for this process? Assume that Ccalorimeter = 35.5J/0C. a. What is the ...

Chemistry
Explain the most important reason why we have attempted to create a model of the atom and more specifically, why it was so important to understand the position and movement of an electron. These are extra credit questions so I neeeed the points but I'm stumped

Chemistry
The solubility Of KCLO is 33g per dm of water at 70 and 8g per dm of water at 20 calculate the mass of the solute which will crystallize out when 160g of the saturated solution is cooled from 70 to 20

Chemistry
Hydrazine has the formula N2H4 and is used as a rocket fuel (e.g. for the Apollo moon rockets). It burns in the following reaction for which the enthalpy change is -583 kJ/mol. N2H4(g) + O2(g) → N2(g) + 2 H2O(g) Calculate the N-N bond enthalpy in hydrazine given the ...

Chemistry
A compound is 85.6% carbon by mass. The rest is hydrogen. When 10.0 g of the compound is evaporated at 50.0 ∘C, the vapor occupies 6.30 L at 1.00 atm pressure. What is the molecular formula of the compound?

Chemistry
Calculate the molecular mass of sulphur if 35 gram of sulphur dissolves in 100 gram of CS2 to produce a solution that has a boiling point of 49.48°C

Chemistry
If you dilute 19.0 mL of the stock solution to a final volume of 0.350 L , what will be the concentration of the diluted solution?

Chemistry Help
For the reaction 2HI(g) <----> H2(g) + I2(g), Kc = 0.0198 at 721K. What is the HI concentration at 721K if [H2] = 0.120 M and [I2] = 0.0150 M? I'm getting .303 M but that's not one of the options.

Chemistry
Hi! Thanks for checking my question out! ____ 2. Which of the following takes place during a redox reaction? (1 point) a) Electrons are gained only. b) Electrons are lost only. c) Electrons are both gained and lost. d) Electrons are neither gained nor lost. My Answer: C Could ...

Chemistry
At room temperature, 20° C, water (H2O) is a liquid and oxygen (O2) is a gas. Based on kinetic molecular theory, which answer best explains the states of the two fluids? aThe particles in the liquid have greater kinetic energy than the particles in the gas. bThe particles in ...

Chemistry Help
For the reaction 2HI(g) <----> H2(g) + I2(g), Kc = 0.0198 at 721K. What is the HI concentration at 721K if [H2] = 0.120 M and [I2] = 0.0150 M? I'm getting .303 M but that's not one of the options.

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