Tuesday
April 28, 2015

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Chemistry
You are titrating 50ml of a 0.02M solution of Zn^+2 at pH 7 with 0.05M solution of EDTA. What is the [Zn+2] after 20mL of EDTA has been added? Kzny=3x10^16
Saturday, March 21, 2015 at 5:47am

chemistry
Calculate ▲U,▲H, ▲S, ▲A and▲G in expanding 1 mole of ideal gas at 25 ° c from 10 to 100 dm cubed. (5marks )
Saturday, March 21, 2015 at 5:01am

chemistry
Distinguish clearly between ▲G for a reaction and ▲S of the same reaction. Which of the two is used to predict whether a reaction is spontaneous? why? (4 marks)
Saturday, March 21, 2015 at 4:53am

chemistry
The standard Gibbs free energy of formation of ammonia at 25 ° c is - 16.5kj per mole.calculate the value of equilibrium constant Kp at this temperature for this reaction. ( 5marks )
Saturday, March 21, 2015 at 4:43am

Chemistry
How many grams of CO(g) are there in 67.0mL of the gas at 0.826atm and 30 ∘C?
Friday, March 20, 2015 at 11:58pm

chemistry
Consider the following reaction. SO3(g) + H2O(l) → H2SO4(aq) A chemist allows 60.9 g of SO3 and 11.1 g of H2O to react. When the reaction is finished, the chemist collects 54.4 g of H2SO4. Determine the limiting reactant, theoretical yield, and percent yield for the ...
Friday, March 20, 2015 at 8:39pm

chemistry
what is the strongest intermolecular force in nitrogen trifluoride
Friday, March 20, 2015 at 8:03pm

Chemistry
A solution is made by mixing 5.00 × 102 mL of 0.167 M NaOH with 5.00 × 102 mL of 0.100 M CH3COOH. Calculate the equilibrium concentrations of H+, CH3COOH, CH3COO−, OH−, and Na+.
Friday, March 20, 2015 at 6:47pm

Chemistry
0.5g sample of bronze containing Zn is dissolved in 100ml of acid. An aliquot of 25ml requred 10.25ml of EDTA. What is the percentage of zinc in the bronze sample?
Friday, March 20, 2015 at 6:27pm

Chemistry
1.) Explain the similarity between Mg(OH)2 and Zn(OH)2 in particular why would any insoluble hydroxide tend to dissolve in an acidic solution? Are they both bases? 2.) Explain the difference in particular how does Mg^+2 appear to form complex ions with OH^- and NH3? If these ...
Friday, March 20, 2015 at 5:44pm

Chemistry
If 2.50 mol. of sodium chloride was required to make up a solution of a particular concentration, what mass would need to be measured out?
Friday, March 20, 2015 at 4:46pm

Chemistry
If you take 3 mLs of a solution that is 4M acetic acid and add enough water to it to make 50 mLs, what is the molarity of the final solution? Thank you!
Friday, March 20, 2015 at 1:21pm

Chemistry
If you measure 2.0 g of ethanol (CH3CH2OH) and add enough water to make 250 mLs (exact amount), what is the molarity of the ethanol in the final solution?
Friday, March 20, 2015 at 1:20pm

chemistry
A proton in a linear accelerator has a de Broglie wavelength of 138pm . What is the speed of the proton?
Friday, March 20, 2015 at 1:18pm

Chemistry
How do I determine the quantity (g) of pure MgSO4 in 2.4g of MgSO4.7H2O
Friday, March 20, 2015 at 1:15pm

chemistry
If you dissolve 3.5 moles of CaCl2 in a solution, how many moles of C+2 ions and C- ions will there be in the solution?
Friday, March 20, 2015 at 12:37pm

chemistry
Calculate the molar concentrations of all phosphate species in H3PO4 in a solution with pH = 2.25, given that the concentration of all four forms of phosphate total 15 mM.
Friday, March 20, 2015 at 11:18am

Chemistry
Citric acid is a triprotic acid with Ka values of 3.14, 5.95, and 6.39. Estimate the pH of a 0.15 M solution of a monosodium salt
Friday, March 20, 2015 at 11:17am

Chemistry
Suppose that a mixture of ice and water is placed in a refrigerator that is held at the freezing point of water, exactly 0.0C. Calculate deltaS for the ice-water mixture, deltaS for the refrigerator, and deltaStotal when 5.00g of ice forms. Is this process spontaneous? Is the ...
Friday, March 20, 2015 at 12:54am

Chemistry- Electrochemistry
Calculate the activity of KI, x, in the following electrochemical cell if the potential is +0.294 V Ag | AgCl(s),NaCl(aq,0.1) ||KI(aq, x),I (s) | Pt
Friday, March 20, 2015 at 12:06am

Chemistry
A balloon is filled with hydrogen at a temperature of 20 C and a pressure of 755 mmHg. If the balloons original volume was 1.05 liters, what will the new volume be at a higher altitude, where the pressure is only 625 mmHg? Assume the temperature stays the same.
Thursday, March 19, 2015 at 11:00pm

Chemistry
1. When adding the sodium borohydride solution to the vanillin solution, why are you told to do so in a dropwise fashion? -So you don't accidentally spill any sodium borohydride -To prevent formation of unwanted vanillin byproducts -to prevent formation of unwanted sodium ...
Thursday, March 19, 2015 at 9:36pm

chemistry
To identify a diatomic gas (X2), a researcher carried out the following experiment: She weighed an empty 2.8-L bulb, then filled it with the gas at 1.20atm and 22.0 ∘C and weighed it again. The difference in mass was 3.9g . Identify the gas.
Thursday, March 19, 2015 at 8:49pm

chemistry micelles
how does an electrolyte (KNO3) affect the formation of micelles?? I'm very unsure. Do they interact with the polar head?
Thursday, March 19, 2015 at 8:04pm

Chemistry
After being heated, an enzyme loses its ability to catalyze a reaction. What change occurred to the enzyme? A. A physical change, because cooling will restore the enzyme's function C. A physical change, because intermolecular forces were overcome
Thursday, March 19, 2015 at 3:20pm

Chemistry
Which argument supports the claim that dissolving solid calcium chloride (CaCl2) in water is a chemical change? A. The ionic bond between the calcium ions and chloride ions is broken. B. The solid calcium chloride can be recovered by evaporating the water. C. The ions present ...
Thursday, March 19, 2015 at 3:11pm

chemistry
LiF, BeF2, PCl3, CCl4, F2 1. which is likely to conduct electricity when aqueous: 2. which is most likely to be a gas in room temp. 3. which is likely to be very soluble in water 4. which is a polar molecule? may have more than one answer
Thursday, March 19, 2015 at 3:01pm

chemistry
As an ionic solid dissolves in water, the temperature of the solution increases. What best describes the enthalpy and entropy of the solution? A. The enthalpy change is negative, and the entropy decreases. B. The enthalpy change is negative, and the entropy increases. C. The ...
Thursday, March 19, 2015 at 2:16pm

chemistry
What is the strongest intermolecular force that occurs between methane (CH4) and ammonia (NH3)? A. Dipole-induced dipole attractions B. Hydrogen bond C. London dispersion forces D. Dipole-dipole forces Is that answer c?
Thursday, March 19, 2015 at 2:02pm

Chemistry
A. The molecules of water on the surface change bonding as they dry out. B. The density of the pin is less than that of the water's surface. C. The surface tension of the water is so low. D. The force exerted by the mass of the pin does not increase the surface area ...
Thursday, March 19, 2015 at 1:57pm

chemistry
I have to do a lab on equilibrium, where you have to transfer water with two different sized straws, and answer questions based on that the questions are about the significance of where there is a flat line on the graph, and the significance of the point where the two lines ...
Thursday, March 19, 2015 at 9:36am

chemistry
what mass of carbon, in grams, can be consumed by 44 g oxygen in in combustion to give carbon monoxide/ what mass of CO is produced?
Thursday, March 19, 2015 at 9:05am

Chemistry
There's reaction involving gas: Fe + H2SO4 -> Fe2(SO4)3 + H2O + SO2 How Fe2(SO4)3 is occur? I know the "2" comes from the ion of SO4, but I don't know where the "3" comes up. Is the Fe2(SO4)3 comes up from half-reaction method? Is the reaction ...
Thursday, March 19, 2015 at 8:15am

Chemistry
1. Iron oxide and carbon monoxide react according to the following equation . Identify which reactant is limiting and which is excess if 43.5 grams of Fe2O3 reacts with 43.5 grams of CO Fe2O3 + 3CO2 --> 3CO2 + 2Fe 2. Calculate the percent yield of Carbon dioxide if 20.0 ...
Thursday, March 19, 2015 at 6:52am

Chemistry
I have to do a lab on equilibrium, where you have to transfer water with two different sized straws, and answer questions based on that the questions are about the significance of where there is a flat line on the graph, and the significance of the point where the two lines ...
Thursday, March 19, 2015 at 1:35am

chemistry
Why is it possible to float a pin on the surface of water? A. The molecules of water on the surface change bonding as they dry out. B. The density of the pin is less than that of the water's surface. C. The surface tension of the water is so low. D. The force exerted by ...
Wednesday, March 18, 2015 at 11:51pm

chemistry
As an ionic solid dissolves in water, the temperature of the solution increases. What best describes the enthalpy and entropy of the solution? A. The enthalpy change is negative, and the entropy decreases. B. The enthalpy change is negative, and the entropy increases. C. The ...
Wednesday, March 18, 2015 at 11:26pm

Chemistry
______________ are similar to covalent bonds in that they hold atoms together. They are different from covalent bonds in that they ___________ . A. Ionic bonds; hold atoms together within a molecule B. Intermolecular forces; require less energy to break C. Intermolecular ...
Wednesday, March 18, 2015 at 11:22pm

chemistry
How do intermolecular forces determine the vapor pressure of a liquid? A. A nonpolar compound has a low vapor pressure because of London dispersion forces. B. A compound that can form hydrogen bonds has a low vapor pressure. C. A polar compound has a high vapor pressure ...
Wednesday, March 18, 2015 at 11:09pm

Chemistry
Which of the following statements is (or are) true? I. All polar molecules have dipole moments. II. All polar molecules have oppositely charged regions. III. A polar molecule is attracted to other molecules because of electrostatic forces. IV. All polar molecules have hydrogen...
Wednesday, March 18, 2015 at 10:53pm

chemistry
calculate how many moles of CaCl2•2H2O are present in 1.0 g of CaCl2•2H2O and then calculate how many moles of pure CaCl2 are present in the 1.0 g of CaCl2•2H2O
Wednesday, March 18, 2015 at 10:09pm

chemistry
how many grams of hydrogen are produced if 22.1g of sodium hydroxide is produced
Wednesday, March 18, 2015 at 9:38pm

Chemistry
1. How many moles of ammonia NH3 are produced when 0.45 moles of nitrogen N2 reacts? N2 + 3H2 yields 2NH3 2. How many mililiters of water will be produced when 2.05 g of hydrogen reacts? The density of water is 1.00 g/mL ? 2H2 + O2 yields 2H2O 3. What is the limiting reactant ...
Wednesday, March 18, 2015 at 8:48pm

chemistry
A chemist heats a sample of copper(II) sulfate and finds that 63.9% of the mass is copper(II) sulfate and the other 36.1% by mass is the water. What is the formula of the hydrate?
Wednesday, March 18, 2015 at 8:38pm

Chemistry I
A bottle of vintage port wine has a volume of 750ml and contains 135ml ethanol. Ethanol has a density of 0.789g/ml. What is the molarity?
Wednesday, March 18, 2015 at 7:41pm

Chemistry
What is the concentration of arsenate ions in 3.5 M solution of arsenic acid? The acid-dissociation constants of H3AsO4 are: Ka1 = 5.0 x 10-3 Ka2 = 9.3 x 10-8 Ka3 = 3.0 x 10-12 I can't figure out how to set up the question
Wednesday, March 18, 2015 at 7:23pm

Chemistry
Assuming that the lab procedure was conducted in an identical manner in all other respects, if a large quantity of vinegar had been taken initially for analysis, for example, a 50.0mL instead of 25.0 mL discuss briefly how each of the following would change. a. the moles of ...
Wednesday, March 18, 2015 at 7:23pm

chemistry
A 8.60-g sample of solid CaSO4·2H2O was heated such that the water turned to steam and was driven off. Assuming ideal behavior, what volume would that steam occupy at 1.00 atm and 100.0 °C?
Wednesday, March 18, 2015 at 7:16pm

rate law chemistry
hey so this is for rate law if the first step is the slow step. it is also an equilibrium. I just want to check if this is right. [Acetophenone]+[Ethoxide]<-k1--> k-1 [Intermediate]+[Ethanol] Just want to make sure this will be the rate law: k1/k-1 [Acetophone][Ethoxide...
Wednesday, March 18, 2015 at 6:53pm

Chemistry
A hot air balloon has a volume of 5.00x10^6 liters. Assuming a density of air of 1.293g/L at 25C and 1atm pressure, what temperature must the operator of the balloon achieve in order for the balloon to lift a 500.0kg payload? How do I set this up???????
Wednesday, March 18, 2015 at 6:25pm

chemistry
1. What is the cause of a gas sample exerting pressure on its surroundings, such as a container? A. The sum of the volumes of all the gas particles in the sample B. Chemical reactions with the container walls C. Collisions of particles of gas D. The weight of the particles on ...
Wednesday, March 18, 2015 at 2:37pm

Chemistry
What is the molarity of an HNO3 solution if 24.1mL of a 0.250M Ba(OH)2 solution is needed to titrate a 15.0mL sample of the acid? Can you tell me the process to finding this answer?
Wednesday, March 18, 2015 at 2:34pm

chemistry
The reaction below has an equilibrium constant of Kp=2.26×104 at 298 K. CO(g)+2H2(g)⇌CH3OH(g) Calculate Kp for the reaction below. 3CH3OH(g)⇌3CO(g)+6H2(g)
Wednesday, March 18, 2015 at 2:16pm

Chemistry
An unknown gaseous hydrocarbon contains 85.63 % carbon. If its density is 0.488 g/L at 0.355 atm and 100°C, what is the molecular formula of the gas? I can't figure this out. By assuming the total mass to be 100g, I get 85.63g C and 14.37g H which I then used to get ...
Wednesday, March 18, 2015 at 1:34pm

chemistry
consider mixing 3.5L of co2 and 1.8L of h2o at 35C and 740mm Hg. determine the mass of the unbalanced reaction. CO2 + H2O = C4H10 + O2
Wednesday, March 18, 2015 at 12:28pm

chemistry
How much energy is needed to completely remove an electron from n = 2 in a hydrogen atom?
Wednesday, March 18, 2015 at 12:04pm

chemistry
A sample of ideal gas at room temperature occupies a volume of 32.0L at a pressure of 272torr . If the pressure changes to 1360torr , with no change in the temperature or moles of gas, what is the new volume, V 2 ?
Wednesday, March 18, 2015 at 11:38am

chemistry
High-pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purify chemical substances. The pressures used in this procedure range from around 500 kilopascals (500,000 Pa ) to about 60,000 kPa (60,000,000 Pa ). It is often convenient to know ...
Wednesday, March 18, 2015 at 11:38am

chemistry
The pressure in car tires is often measured in pounds per square inch (lb/in. 2 ), with the recommended pressure being in the range of 25 to 45 lb/in. 2 . Suppose a tire has a pressure of 45.0lb/in. 2 . Convert 45.0lb/in. 2 to its equivalent in atmospheres.
Wednesday, March 18, 2015 at 11:37am

Chemistry
Provide the balanced reaction, the value of K, and E(cell) at equilibrium for the for the electrochemical cell created from the two half-cell reactions below Cr^(3+) + e ==> Cr^(2+) Fe^(2+) + 2e ==> Fe Well, I got the balanced reaction: 2Cr^(2+) + Fe^(2+) ==> Fe + 2Cr...
Wednesday, March 18, 2015 at 10:59am

chemistry
1. Ideal gas particles: A. have no mutual attraction and no individual volume. B. have no mass or volume. C. have no odor and no color. D. have no density and do not form bonds. Is it A? 2. Why does the density of gas in a hot air balloon decrease as the gas is heated? A. The ...
Wednesday, March 18, 2015 at 1:53am

chemistry
Bacl2+h2so4 white coller way to ans
Wednesday, March 18, 2015 at 1:51am

chemistry
What would be the mass in grams of one million (1.0*10^6) chromium atoms?
Wednesday, March 18, 2015 at 12:30am

Chemistry
How does table salt (NaCl) dissolve in water? A. The oxygen atoms in water molecules attract sodium ions. B. Each sodium ion is surrounded by chloride ions. C. Each NaCl molecule is surrounded by water molecules. D. Water molecules hydrogen bond with sodium ions and chloride ...
Wednesday, March 18, 2015 at 12:29am

Chemistry
What are the concentrations of Cu^2+, NH3, and Cu(NO3)4^2+ at equilibrium when 18.8 g of Cu(NO3)2 is added to 1.0 L of a .400 M solution of aqueous ammonia? Assume that the reaction goes to completion and forms Cu(NH3)4^2+.
Tuesday, March 17, 2015 at 11:31pm

chemistry
To dissolve an ionic solid in water, you must first disrupt the ionic bonds that are holding the ionic lattice together. This is an endothermic process, yet many ionic solids have an exothermic heat of solution. (Heat is released when the ionic solid is dissolved.) This is ...
Tuesday, March 17, 2015 at 11:30pm

Chemistry
Liquid methyl alcohol, which has polar molecules, will dissolve: A. only solutes that are other polar liquids. B. only solutes that are other liquids. C. nonpolar solutes. D. polar solutes. Is the answer d.
Tuesday, March 17, 2015 at 10:46pm

chemistry
Thermochemistry: 1. Calculate the amount of heat required to decompose 3.5 moles of sodium bicarbonate. 2NaHCO3 + 129 kJ  Na2CO3 + H2O + CO2 In this question, the heat of the reaction is part of the question instead of being written beside it- (What's the ...
Tuesday, March 17, 2015 at 10:28pm

chemistry
Which step during the dissolving process releases energy? A. Separating solute particles from one another B. Adding solute into the solvent C. Separating solvent particles from one another D. Mixing the particles of solute with particles of solvent
Tuesday, March 17, 2015 at 10:15pm

Chemistry
Olive oil has a higher viscosity than benzene. Which statement best explains the reason for the difference in viscosity between these two liquids? A. Molecules of olive oil take up a smaller volume than molecules of benzene. B. Fewer intermolecular forces exist between ...
Tuesday, March 17, 2015 at 10:13pm

chemistry
2 NH3 (g) ----> N2 9g) + 3 H2 (g) at equilibrium, [NH3] = 0.0227 M, [N2] = 0.119 M, and [H2] = 0.346 M. Calculate Kc for the reaaction at this temperature
Tuesday, March 17, 2015 at 9:41pm

Chemistry
Write an equation to represent the oxidation of I- to I2 in acidic solution, with ozone as the oxidizing agent. I know ozone will be reduced to H2O, but I am not sure how to figure out the acidic solution. Thank you!
Tuesday, March 17, 2015 at 9:38pm

Chemistry
How many grams of aspirin are present in 0.50 mole of aspirin?
Tuesday, March 17, 2015 at 9:32pm

biology/ chemistry
how do electrolytes affect the formation of micelles?
Tuesday, March 17, 2015 at 8:46pm

chemistry
what is the iobic equation of zinc +iron(ll)sulphate solution
Tuesday, March 17, 2015 at 8:42pm

Chemistry
Write equations for the separation of Fe2O3 from Bauxite ore, along with a short description of the process. I have no idea where to start for this question, any help would be appreciated!
Tuesday, March 17, 2015 at 7:38pm

Chemistry
A certain reaction has an activation energy 52.93 kJ/mol. At what kelvin temperature will the reaction proceed 8.00 times faster than it did at 315K? Ea = 52.93 kJ/mol = 52930J R (gas constant) = 8.314 T1 = 315K k1 = rate constant at T1 T2 = ? k2 = rate constant at k2 = 8.00 ...
Tuesday, March 17, 2015 at 7:23pm

chemistry
Ammonia is often produced by reacting nitrogen gas with hydrogen gas. How many liters of ammonia gas can be formed from 12.9 L of hydrogen gas at 93.0°C and a pressure of 43.5 kPa? (Assume an excess amount of nitrogen gas.) I have absolutely no idea how to begin this.
Tuesday, March 17, 2015 at 6:56pm

Chemistry
I just want to make sure that D is the correct answer. Each halogen is a diatomic element. However, under normal conditions chlorine is a gas, bromine is a liquid, and iodine is a solid. What is the best explanation for this difference? A. The strength of the covalent bond ...
Tuesday, March 17, 2015 at 3:32pm

chemistry
I believe the answer is c I just wanted to make sure. What can help overcome a positive enthalpy of solution and allow a solid solute to dissolve in water? A. A decrease in entropy B. A large amount of energy released C. An increase in entropy D. A large amount of energy absorbed
Tuesday, March 17, 2015 at 3:21pm

chemistry
A mixture of gases contains 0.235 mol CO2, 0.124 mol CO, and 0.326 mol O2. If the total pressure of the mixture is 4.62 atm, what is the partial pressure of each gas?
Tuesday, March 17, 2015 at 2:09pm

chemistry
C6H12O6(s) + 9 O2(g) --------- 6 CO2(g) + 6 H2O(g) What volume of oxygen gas measured at 27oC and 0.987 atm is needed to react with 8 g of C6H12O6? (C-12.01, H-1.008, O-16.00).
Tuesday, March 17, 2015 at 1:58pm

Chemistry
The starting material in this synthesis experiment Fe(NH4)2(SO4)2*6H2O. What is the ionic charge of the atom? Show your calculations
Tuesday, March 17, 2015 at 11:38am

chemistry
2.241 g sample of nickel combines with oxygen to produce 2.852 g of metal oxide. Calculate the number of grams of xygen in the metal oxide.
Tuesday, March 17, 2015 at 10:47am

Chemistry
Enthalpy Change Given the following reactions: S(s) + O2(g) → SO2(g) ΔH = -297 kJ/mol SO2(g) + ½ O2(g) → SO3(g) ΔH = -141 kJ/mol Calculate the ΔH for the reaction: S(s) + 3/2O2(g) → SO3(g)
Tuesday, March 17, 2015 at 10:23am

chemistry
When a mixture of two black powders is heated, it gave off a gas which turned lime water milky Give a chemical equation to show the reaction between gas and lime water Red scales residue can be seen on the black residue. Name the red scales The red scale residue partly ...
Tuesday, March 17, 2015 at 5:08am

Chemistry
how many grams of potassium hydroxide would need to be added to 400 mL of 0.150M HNO3 to raise its pH to 2.5
Tuesday, March 17, 2015 at 3:07am

Chemistry
an unknown salt is either NaCN,NaC2H3O2, NaF, NaCl, or NaOCl. when 0.100 molar of the salt is dissolved in 1.00 L of solution, the ph of the solution is 8.07. what is the identity of the salt? where do I start? How do I solve it, cuz im not gettign right answer.
Tuesday, March 17, 2015 at 12:28am

Chemistry
Container A contains argon gas at 0C and pressure 380mmHg. Container B of volume 700 ml contains neon gas at 25C and pressure of 3atm. Both of these gases are placed in a 2L vessel at 273K and the total pressure is 1.46atm. What is the volume of container A?
Monday, March 16, 2015 at 11:40pm

Chemistry
HCI is a strong acid. What is the ion concentration, (H+), of a 0.0015M solution of HCI? What is the pH of a 0.0015M solution of HCI? I have looked in my book but it not making sense. I am not sure where to even start the problem. A little guidance please
Monday, March 16, 2015 at 11:30pm

chemistry
If a solution of lead iodide has [I-] = 1.1x10-4 M, what is the lead(II)ion concentration at equilibrium?
Monday, March 16, 2015 at 10:02pm

chemistry
The enthalpy of formation of MX is ΔHf° = –493 kJ/mol. The enthalpy of sublimation of M is ΔHsub = 143 kJ/mol. The ionization energy of M is IE = 437 kJ/mol. The electron affinity of X is ΔHEA = –317 kJ/mol. (Refer to the hint). The bond energy of ...
Monday, March 16, 2015 at 8:42pm

Physical Chemistry
If a 30g piece of ice at -5C is immersed in 125mL of water at 25C in an insulated container... A. Determine the final temperature and final composition of the system B. Determine the entropy changes of the ice and the water and the overall entropy change of this process.
Monday, March 16, 2015 at 7:50pm

Chemistry
How much heat is required to convert 6.78g of ice at − 14.0∘C to water at 24.0∘C ?
Monday, March 16, 2015 at 6:50pm

Chemistry
1. Imagine you have a saturated solution of Ca(OH)2, at equilibrium, that has some undissolved Ca(OH)2 precipitated on the bottom of the test tube. If you add an additional scoop of Ca(OH)2 to the solution will concentration of [OH-] in the solution (increase, decrease, or be ...
Monday, March 16, 2015 at 2:34pm

chemistry
The number of moles of solute in a bottle containing 300 mL of 0.178 mol/L sodium sulfite solution is
Monday, March 16, 2015 at 2:16pm

chemistry
The concentration of a solution made by diluting 10.0 mL of 0.685 mol/L NaBr to 300 mL is
Monday, March 16, 2015 at 2:15pm

chemistry
I need an example of an elementary reaction to go with the definition An elementary reaction is a reaction in which reactants are converted to products in a single step.
Monday, March 16, 2015 at 1:55pm

AP Chemistry
To have a buffer with a pH of 2.50, what volume of 0.510 M NaOH must be added to 100. mL of 0.230M H3PO4?
Monday, March 16, 2015 at 1:29pm

chemistry
A restaurant serves tea in aluminum mugs. The aluminum mug has a mass of 125 g, initially at 24.0 oC with 341 mL tea at 80.0oC. What is the final temperature of the tea after the tea and mug attain equilibrium. Assume the tea has the same specific heat capacity and density as ...
Monday, March 16, 2015 at 1:29pm

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