Thursday
July 24, 2014

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Post a New Question | Current Questions

Chemistry
A 2.6 g of a substance that looks like gold needed 9.4 J of heat energy to raise its temperature from 20 to 38 ºC. Is the metal pure gold?
Friday, March 7, 2014 at 4:11am

Chemistry
A 3.68 g sample of solid gold is heated from 24 ºC to 34 ºC. How much energy (in joules and calories) is required? Thank you!
Friday, March 7, 2014 at 4:10am

chemistry
What is the total energy change if 150.0 grams of ice at 0.0 oC are melted, then the water is warmed to 45.0 oC? Is this process endothermic or exothermic? ƒ´Hf = 6.01 kJ/mol(multiple steps)
Thursday, March 6, 2014 at 10:32pm

chemistry
Which of the isotopes of hydrogen is radioactive
Thursday, March 6, 2014 at 9:26pm

chemistry
in regards to electrochemistry, Can Na metal displace Zn2+ in a single replacement reaction?
Thursday, March 6, 2014 at 7:47pm

chemistry
My motorcycle has a capacity of 4.5 gal of octane. If I combust all of the octane, what is the volume of CO2 generated by my motorcycle on one tank of gas? Assume that I burn all of the octane into CO2 on a warm day in June, where it is 80 degrees F outside with a barometric ...
Thursday, March 6, 2014 at 7:32pm

chemistry
An Ideal solution is formed by mixing 0.26 mol of pentane (vapor pressure + 511 torr) with 0.34 mol of hexane (vapor pressure = 150 torr). What is the total vapor pressure of the ideal solution?
Thursday, March 6, 2014 at 4:59pm

Chemistry
Please help me!! 350.0 ml of water is heated from 20.5 C to 98.2 C. What is the amount of energy required for this change?
Thursday, March 6, 2014 at 3:08pm

chemistry
5.48 mL of 2.01 mM Fe(NO3)3, 3.10 mL of 2.05 mM KSCN and 1.42 mL of water.find the number of moles of Fe3+ and SCN-
Thursday, March 6, 2014 at 10:47am

Chemistry
Consider the following balanced equation: 2N2H4(g)+N2O4(g)→3N2(g)+4H2O(g) Complete the following table showing the appropriate number of moles of reactants and products. If the number of moles of a reactant is provided, fill in the required amount of the other reactant, ...
Wednesday, March 5, 2014 at 11:03pm

Chemistry
What is the minimum amount of 5.9M H2SO4 necessary to produce 27.7g of H2 (g) according to the following reaction? 2Al(s)+3H2SO4(aq)→Al2(SO4)3(aq)+3H​2(g)
Wednesday, March 5, 2014 at 10:36pm

chemistry-urgent
Silver nitrate is added to a solution and precipitate forms. This precipitate dissolves when concentrated ammonia is added. What anion was present in the original solution? I dont know how to answer this. Also can someone please explain how to identify a cation and anion in a ...
Wednesday, March 5, 2014 at 10:16pm

Chemistry
If 2.5 grams of citric acid (H3C6H5O7) reacts, how many grams of carbon dioxide will be generated?
Wednesday, March 5, 2014 at 8:55pm

Chemistry
If 2.5 grams of citric acid (H3C6H5O7) reacts, how many moles of carbon dioxide will be generated?
Wednesday, March 5, 2014 at 8:54pm

Chemistry
If 2.5 grams of citric acid (H3C6H5O7) reacts, how many moles of sodium bicarbonate will be consumed?
Wednesday, March 5, 2014 at 8:53pm

Chemistry
A gas occupies a volume of .350 L at a temperature of 18.0 degrees Celsius and a pressure of 980.0 torr. What will be the volume of this gas at standard conditions? Please explain how to do it.
Wednesday, March 5, 2014 at 8:29pm

Chemistry
Write the reaction for the synthesis of water vapor from hydrogen gas and oxygen gas and balance it. If you used 0.022 mol hydrogen, how many mol of oxygen would you need in order for it to completely react and have no limiting reactant? Can you please explain in detail how to...
Wednesday, March 5, 2014 at 7:45pm

AP Chemistry
Use the Clausius-Clapeyron equation to calculate the temperature at which pure water would boil at a pressure of 367 torr. The heat of vaporization of water is 43105 J/mol at 100◦C. Answer in units of ◦C
Wednesday, March 5, 2014 at 7:19pm

AP Chemistry
Benzene is a hydrocarbon that is commonly used as a commercial solvent. However, it is carcinogenic; i.e., accumulations in the body can cause cancer. What is the vapor pressure of benzene at 58◦C? The normal boiling point of benzene is 80.0◦C and its molar heat of...
Wednesday, March 5, 2014 at 7:18pm

Chemistry
Is the reaction between sodium sulfate and strontium nitrate endothermic or exothermic and why?
Wednesday, March 5, 2014 at 7:13pm

chemistry
how are buckeyballs,diamond, and graphite similar? how are they different?
Wednesday, March 5, 2014 at 7:09pm

chemistry
Given the following thermochemical equations, NO(g) + (1/2) Cl2(g) --> NOCl(g) -37.78 kJ (per mol NOCl) NO(g) + (1/2) O2(g) --> NO2(g) -56.53 kJ (per mol NO2) 2 NO2(g) --> N2O4(g) -58.03 kJ (per mol N2O4) what is the standard enthalpy change for the reaction below? ...
Wednesday, March 5, 2014 at 6:15pm

chemistry
What is w when 1.27 kg of H2O(l), initially at 25.0oC, is converted into water vapour at 133oC against a constant external pressure of 1.00 atm? Assume that the vapour behaves ideally and that the density of liquid water is 1.00 g/mL. (Remember to include a "+" or &...
Wednesday, March 5, 2014 at 6:14pm

chemistry
A 0.016076-mol sample of an organic compound was burned in oxygen in a bomb calorimeter. The temperature of the calorimeter increased from 23.7oC to 24.5oC. If the heat capacity of the calorimeter is 4.98 kJ (oC)-1, then what is the constant volume heat of combustion of this ...
Wednesday, March 5, 2014 at 6:13pm

chemistry
a barometer is read directly in torrs or mm Hg. an open-end manometer has a closed arm liquid height of 48.4 mm and an open arm liquid height of 62.6 mm. if the air pressure is 758.0 torrs, what is the pressure of the gas connected to the manometer?
Wednesday, March 5, 2014 at 6:03pm

college chemistry
Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the percent yield for the ...
Wednesday, March 5, 2014 at 5:13pm

chemistry
Copper(II) sulfide reacts with oxygen to produce copper (II) oxide plus sulfur dioxide. Suppose you start this reaction with 50.0 grams of copper(II) sulfide and 50.0 grams of oxygen and you actually produce 33.5 grams of copper(II) oxide. Calculate the percent yield for the ...
Wednesday, March 5, 2014 at 5:12pm

chemistry
A 1.009g mixture of Na2SO4 (molar mass=142.04 g/mol) and Pb(NO3)2 (molar mass= 331.20 g/mol)? A)write th3 molecular form of the equation for the reaction. b)write the net ionic equation for the reaction.
Wednesday, March 5, 2014 at 4:54pm

Chemistry
How many copper atoms are in a pure copper statue with a mass of 139kg{\rm kg}
Wednesday, March 5, 2014 at 12:01pm

Chemistry
Iron ores have different amounts of iron per kilogram of ore. Calculate the mass percent composition of iron for each iron ore: Fe2O3{\rm Fe_2O_3} (hematite), Fe3O4{\rm Fe_3O_4} (magnetite), FeCO3{\rm FeCO_3} (siderite).
Wednesday, March 5, 2014 at 11:59am

chemistry
A 7.00 g sample of KCl is dissolved in 81.0 mL of water. The resulting solution is then added to 28.0 mL of a 0.790 M CaCl2(aq) solution. Assuming that the volumes are additive, calculate the concentrations of each ion present in the final solution.
Wednesday, March 5, 2014 at 11:55am

Chemistry
Citric acid, the compound responsible for the sour taste of lemons, has the following elemental composition: C{\rm C}, 37.51%\%; H{\rm H}, 4.20%\%; O{\rm O}, 58.29%\%.Calculate the empirical formula of citric acid
Wednesday, March 5, 2014 at 11:53am

analytical chemistry
Suppose a 4.272 g soil sample undergoes an extraction with 50 ml of extracting solvent to remove the lead. This 50 ml was then diluted to 250 ml and tested by atomic absorption technique. The concentration of lead in this diluted extract was found to be 35.7 ppm. What is the ...
Wednesday, March 5, 2014 at 11:04am

Chemistry
Calculate the molar concentration of ethanoic acid needed to prepare ethanoate buffer of PH 6.8 using 0.5m solution of sodium ethanoate. Pka of ethanoate acid is 0.127
Wednesday, March 5, 2014 at 10:35am

Chemistry
How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer? Can someone please explain to me how to do B and C step by step so I could understand it clearly? :) Say, for example, that you had prepared a buffer in which you mixed 10.30 ...
Wednesday, March 5, 2014 at 10:35am

Chemistry
Suppose that 14.9 mL of 0.0512 M NaOH were required to titrate a sample of unknown acid. How many moles of NaOH were used?
Wednesday, March 5, 2014 at 8:45am

Chemistry
What is the difference between solubility and solubility curve?
Wednesday, March 5, 2014 at 7:50am

Chemistry
If 0.08 mol of LiCl is added to a one liter solution that has dissolved 0.01 mol of PbCl2, will a precipitate occur?
Tuesday, March 4, 2014 at 10:49pm

chemistry
Calculate the mass of nickel(II) sulfate and the mass of water contained in 200. g of a 6.00% solution of nickel(II) sulfate
Tuesday, March 4, 2014 at 9:11pm

Chemistry
Compare the physical and chemical properties of acids and bases.
Tuesday, March 4, 2014 at 8:52pm

chemistry
which of the following summarizes Charles' Law? A. as temperature decreases, the gas particles slow down and take up less space B. as temperature increases, the gas particles slow down and take up less space C. when pressure decreases, the gas particles are allowed to ...
Tuesday, March 4, 2014 at 8:37pm

chemistry 1
DDT concentrations in ground water. How do you set it up with a sample size of 250.0mL and the mass of DDT at 0.030 and then convert to millimoles. Just can't remember how to set it up.
Tuesday, March 4, 2014 at 8:20pm

Chemistry
How would you calculate the pH of the buffer if 1.0mL of 5.0M NaOH is added to 20.0mL of this buffer? Can someone please explain to me how to do B and C step by step so I could understand it clearly? :) Say, for example, that you had prepared a buffer in which you mixed 10.30 ...
Tuesday, March 4, 2014 at 8:16pm

Chemistry
Compare the physical and chemical properties of acids and bases.
Tuesday, March 4, 2014 at 7:31pm

Chemistry
if 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution? i got 3M but i dont think its right
Tuesday, March 4, 2014 at 7:07pm

Chemistry
if 25.0 mL of 15M nitric acid is diluted to 125 mL, what is the concentration of the new solution? i got 3M but i dont think its right
Tuesday, March 4, 2014 at 6:37pm

Chemistry
what volume of concentrated 18M H2SO4 is required to prepare 250mL of a 6.0M solution? how would you solve this problem? i know it has something to do with the molarity formula but no idea how to apply it
Tuesday, March 4, 2014 at 6:17pm

chemistry 2
You are instructed to create 800. mL of a 0.69 M phosphate buffer with a pH of 7.6. You have phosphoric acid and the sodium salts NaH2PO4, Na2HPO4, and Na3PO4 available. what is the molarity needed for the acid component of the buffer?What is the molarity needed for the base ...
Tuesday, March 4, 2014 at 3:36pm

College Chemistry.
During volcanic eruptions, hydrogen sulfide gas is released and is oxidized by the oxygen in the air yielding sulfur dioxide gas and water vapour. Calculate the standard enthalpy change for this reaction given the following: 3S(rhombic) + 2H2O(g) → 2H2S(g) + SO2(g) Δ...
Tuesday, March 4, 2014 at 2:23pm

Chemistry
How much would the boiling point of water increase if 4 mol of sugar were added to 1 kg of water (Kb=0.51C/(mol/kg)for water and i=1 for sugar)?
Tuesday, March 4, 2014 at 1:15pm

AP Chemistry
Rank the following in terms of increasing ox- ide acidity. 1. Na2O, CO2, NO2 2. CO2, NO2, Na2O 3. NO2, CO2, Na2O 4. CO2, Na2O, NO2
Tuesday, March 4, 2014 at 12:46pm

Chemistry
A mixture of gases is made up 0.48 mol of Ar and 0.94 mol of N2 with a total pressure of 1.68 atm. What is the partial pressure of Ar?
Tuesday, March 4, 2014 at 1:39am

Chemistry Need Help!
Okay, the reaction is this: Naphthalene + HNO3 ---> NitroNapthalene The limiting reagent is Naphthalene The excess is the nitric acid The equation is 1:1 balanced as far as I know 3 g of Nap used in the experiment x 1mol/128.17 g/mol = .023 mol Nap 12.69 g used in the ...
Tuesday, March 4, 2014 at 12:10am

Chemistry
Calculate the pH for each of the following cases in the titration of 50.0 mL of 0.240 M HClO(aq) with 0.240 M KOH(aq). The ionization constant for HClO can be found here.
Monday, March 3, 2014 at 11:37pm

AP Chemistry
Which of the following salts is the most acidic in aqueous solutions? 1. KBr 2. NaI 3. Al(NO3)3 4. BaCl2 5. AgNO3 6. Fe(NO3)2 7. Pb(NO3)2
Monday, March 3, 2014 at 10:47pm

AP Chemistry
If 252mL of 2.5molar HCl solution is added to 343 mL of 2.8 molar Ba(OH)2 solution, what will be the molarity of BaCl2 in the resulting solution?
Monday, March 3, 2014 at 10:28pm

chemistry
How would applying an external pressure on the following equilibrium affects the distribution of iodide between the polar (aqueous) and non polar (varsol)
Monday, March 3, 2014 at 7:56pm

Chemistry
a mixture of 34.0g of ammonia and 50.0g of elemental oxygen react to form elemental nitrogen and water. Please write a balanced chemical equation for this reaction. Find the theoretical yield of water in grams and give the amount of excess reactant in grams
Monday, March 3, 2014 at 7:22pm

Chemistry
What would be the volume of 5.0 moles of gas at STP? Can you explain how to do it please?
Monday, March 3, 2014 at 7:12pm

Chemistry:Important!!!!!!!
20.00 mL of a H2SO4 solution with an unknown concentration was titrated to a phenolphthalein endpoint with 39.13 mL of a 0.1061 M NaOH solution. What is the concentration of the H2SO4 solution?
Monday, March 3, 2014 at 6:32pm

chemistry
3PbO2 + 2Cr3++ 2H2O3Pb2+ + 2CrO42-+ 4H+ In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. 1.name of the element oxidized: 2.name of the element reduced: 3.formula of the ...
Monday, March 3, 2014 at 6:06pm

chemistry
SO42- + HAsO2+ 2H+H3AsO4 + SO2 In the above redox reaction, use oxidation numbers to identify the element oxidized, the element reduced, the oxidizing agent and the reducing agent. 1. name of the element oxidized: 2. name of the element reduced: 3. formula of the oxidizing ...
Monday, March 3, 2014 at 6:03pm

chemistry
3PbO2 + 2Cr3++ 2H2O3Pb2+ + 2CrO42-+ 4H+ 1. In the above reaction, the oxidation state of chromium changes from (answer) to (answer). 2. How many electrons are transferred in the reaction?
Monday, March 3, 2014 at 6:01pm

chemistry
SO42- + HAsO2+ 2H+H3AsO4 + SO2 1. In the above reaction, the oxidation state of sulfur changes from (Answer) to (Answer) 2. How many electrons are transferred in the reaction?
Monday, March 3, 2014 at 5:59pm

Chemistry 2
For the fist order reaction A <-> B, calculate the t1/2(half life) and k(rate constant) and also fill in the blanks. A-Concetration t-time 20 0 10 ? 5 40 sec 3 ? ? 500 sec t1/2=? k=?
Monday, March 3, 2014 at 5:40pm

Chemistry
Many portable gas heaters and grills use propane, C3H8(g). Using enthalpies of formation, calculate the quantity of heat produced when 17.0g of propane is completely combusted in air under standard conditions. Assume that liquid water is forming.
Monday, March 3, 2014 at 4:38pm

AP Chemistry
In neutralization reactions, acid + base -> salt + water HCL can be neutralized with NaOH. How many moles of NaOH will it take to neutralize 0.56 L of 0.51 M HCl?
Monday, March 3, 2014 at 4:34pm

chemistry
A student determines the cobalt(II) content of a solution by first precipitating it as cobalt(II) hydroxide, and then decomposing the hydroxide to cobalt(II) oxide by heating. How many grams of cobalt(II) oxide should the student obtain if her solution contains 46.0 mL of 0....
Monday, March 3, 2014 at 4:30pm

chemistry
A 0.5917 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.5683 g. What is the mass percentage of chlorine in ...
Monday, March 3, 2014 at 4:29pm

chemistry
How many mL of 0.716 M HNO3 are needed to dissolve 7.67 g of MgCO3? 2HNO3(aq) + MgCO3(s) Mg(NO3)2(aq) + H2O(l) + CO2(g)
Monday, March 3, 2014 at 4:29pm

chemistry
How many grams of PbBr2 will precipitate when excess FeBr2 solution is added to 47.0 mL of 0.563 M Pb(NO3)2 solution? Pb(NO3)2(aq) + FeBr2(aq) PbBr2(s) + Fe(NO3)2(aq)
Monday, March 3, 2014 at 4:28pm

chemistry
When aqueous solutions of potassium hypochlorite and nitric acid are mixed, an aqueous solution of potassium nitrate and hypochlorous acid results. Write the net ionic equation for the reaction. Use H+ for the hydronium ion.
Monday, March 3, 2014 at 4:27pm

chemistry
When aqueous solutions of potassium carbonate and magnesium nitrate are combined, solid magnesium carbonate and a solution of potassium nitrate are formed. The net ionic equation for this reaction is:
Monday, March 3, 2014 at 4:27pm

AP Chemistry
50.0 mL of an HCl solution with a pH of 3.5 neutralizes 200.0 mL of a Ca(OH)2 solution. What is the molarity of the Ca(OH)2 solu- tion?
Monday, March 3, 2014 at 4:10pm

Chemistry 2
For a second order reaction A <--> B, calculate the t1/2 (half life) and the k(constant) and also fill in the blanks. A (concentration) t(time) 20 0 sec 10 ? 5 40 sec 3 ? ? 200 sec t1/2=? k=?
Monday, March 3, 2014 at 3:58pm

chemistry
The following molecular equation represents the reaction that occurs when aqueous solutions of lead(II) nitrate and magnesium chloride are combined. Pb(NO3)2 (aq) + MgCl2 (aq) PbCl2 (s) + Mg(NO3)2 (aq) Write the balanced net ionic equation for the reaction.
Monday, March 3, 2014 at 3:30pm

chemistry
Write the net ionic equation for the following molecular equation. CoI2(aq) + K2CO3(aq) CoCO3(s) + 2KI(aq)
Monday, March 3, 2014 at 3:26pm

chemistry
Write the net ionic equation for the following molecular equation. HBr is a strong electrolyte. HClO is a weak electrolyte. KClO(aq) + HBr(aq) KBr(aq) + HClO(aq)
Monday, March 3, 2014 at 3:18pm

Chemistry 2
For the fist order reaction A <-> B, calculate the t1/2(half life) and k(rate constant) and also fill in the blanks. A-Concetration t-time 20 0 10 ? 5 40 sec 3 ? ? 500 sec t1/2=? k=?
Monday, March 3, 2014 at 3:13pm

Chemistry 2
When we mix 25.0 mL, 2.0 M BaCl2 with 25.0 mL, 3.0 M Na2SO4 what is the balanced equation? What is the ionic equation? what is the net ionic equation?
Monday, March 3, 2014 at 2:52pm

Chemistry 2
For the reaction: 2A + 3B <--> 4C Kinetic data are as follows A B time needed 10mL 5mL 720 seconds 20mL 5mL 180 seconds 20mL 10mL 90 seconds 30mL 20mL ?? The rate of the equation is?
Monday, March 3, 2014 at 2:44pm

Chemistry 2
What is the molarity of 50.0 mL solution of aluminum sulfite that contains 80.0 g of this salt? (Al=27.0, S=32.0,O=16.0)
Monday, March 3, 2014 at 2:04pm

Chemistry
What mass of sodium benzoate should be added to 160.0mL of a 0.17M benzoic acid solution in order to obtain a buffer with a pH of 4.30?
Monday, March 3, 2014 at 1:27pm

chemistry
a 0.2000 grams sample of aluminum metal is added to a solution containing 1.0000grams of an unknown compound made of platinum and chloride ion. the reaction results in the formation of aluminum chloride and platinum metal. when the reaction is complete, unreacted aluminum ...
Monday, March 3, 2014 at 11:51am

Chemistry
I am learning the different types of chemical reactions synthesis, decomposition, single displacement, and double displacement I am also learning skeletal equations word equations and balancing the equations I know how to balance equations if I am given the formula in symbols ...
Monday, March 3, 2014 at 11:29am

Chemistry
A weather balloon with a volume of 3.86934 L is released from Earth’s surface at sea level.What volume will the balloon occupy at an altitude of 20.0 km, where the air pressure is 10 kPa? Answer in units of L
Sunday, March 2, 2014 at 11:43pm

Chemistry
What is the molarity of a 25.0% (v/v) aqueous isopropyl alcohol solution? the density of isopropyl alcohol ( C3H8O, molar mass 60.1g/mol) is 0.786g/ml
Sunday, March 2, 2014 at 11:32pm

chemistry
Sodium thiosulfate, Na2S2O3, is used as a fixer in photographic film developing. The amount of Na2S2O3 in a solution can be determined by a titration with iodine, I2, according to the equation: 2Na2S2O3(aq) + I2(aq) --> Na2S4O6 +2NaI(aq). Calculate the concentration of the ...
Sunday, March 2, 2014 at 10:53pm

Chemistry
A solution is prepared by placing 27.8 g of KCl in a 0.700 L volumetric flask and adding water to dissolve the solid, then filling the flask to the mark. What is the molarity of an AgNO3 solution if 22.1 mL of the KCl solution react exactly with 43.0 mL of the AgNO3 solution?
Sunday, March 2, 2014 at 10:21pm

cHEMISTRY
i dont know how to write chemical formulas is it like nomenclature because i need to balance equations (which i know how if the equation is given to me the symbols type but not in words), i need to write skeletal equations but i dont know if they are correct. example: 2H2+O2-&...
Sunday, March 2, 2014 at 9:48pm

College Chemistry - Science
In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid present in coke. ...
Sunday, March 2, 2014 at 9:25pm

Chemistry
1.If the atmosphere can support a column of mercury 762 mm high at sea level, what height of water could be supported? The density of water is approximately 114 that of mercury.Answer in units of mm 2.If the atmosphere can support a column of mercury 762 mm high at sea level, ...
Sunday, March 2, 2014 at 9:07pm

College Chemistry - Science
At room temperature (25°C), 45 mL of a 0.002 M acid solution reacts with 30 mL of a NaOH (aq) solution (pH = 11.95), determine (through calculations) whether the acid is phosphoric acid (H3PO4), acetic acid (CH3COOH), or carbonic acid (H2CO3).
Sunday, March 2, 2014 at 7:54pm

Chemistry - Science
In an acid-base experiment at 25.0°C, a sodium hydroxide solution was standardized against KHP. The average value for the concentration of the sodium hydroxide solution was calculated to be 0.0125 M. This solution was used to titrate the phosphoric acid present in coke. ...
Sunday, March 2, 2014 at 7:49pm

chemistry
A 25.0-mL sample of H2SO4 is neutralized with NaOH. What is the concentration of the H2SO4 if 35.0 mL of 0.150 M NaOH are required to completely neutralize the acid?
Sunday, March 2, 2014 at 7:14pm

chemistry
What is the product for Ni(s) + 2Na^+? I don't think this is possible. Am I wrong?
Sunday, March 2, 2014 at 7:11pm

chemistry
Predict the prdeucts of the following acid/base and precipitation reactions and balance the equations. Remeber to indicate (s), (l) or (aq Q1. HCI(aq) + Mg(OH)2(aq)----> Q2. Pb(NO3)2(aq)+ Na2S (aq)---> Q3. write the ionic equation for question 2.
Sunday, March 2, 2014 at 6:57pm

Chemistry
describe how you would prepare 500.0 ml of 0.400M NaCl solution, starting from solid NaCl
Sunday, March 2, 2014 at 6:50pm

Chemistry
Determine the sulfate ion concentration in a solution prepared by diluting 15.00mL of a 0.200M aluminum sulfate solution with 35.00mL of water. Assume the volumes are additive.
Sunday, March 2, 2014 at 6:49pm

Chemistry
Divers know that the pressure exerted by the water increases about 100 kPa with every 10.2 m of depth. This means that at 10.2 m below the surface, the pressure is 201 kPa; at 20.4 m below the surface, the pressure is 301 kPa; and so forth. If the volume of a balloon is 3.2 L ...
Sunday, March 2, 2014 at 6:10pm

Pages: <<Prev | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | Next>>

Post a New Question | Current Questions

Homework Help: Science

Search
Members