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March 28, 2017

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Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Chemistry
I’m trying to precipitate out FePO4. Following the reaction: H3PO4 + FeCl3 = FePO4(s) + 3HCl I reacted phosphoric acid to ferric chloride, and according to the reaction, there should be a precipitate. But I haven’t observed a precipitate for the last 3 hours. Is there a ...
Thursday, March 9, 2017 by Shudip

Chemistry
What mass of glucose (C6H12O6) must dissolve in 400.0 g of ethanol to make a 1.60 m solution?
Thursday, March 9, 2017 by ELissa

chemistry
name an invention or event (related to science or technology) from the past 100 years that you think has helped shape the roles of women today.
Wednesday, March 8, 2017 by ally

chemistry
what mass of gold can you extract from 34.94g of AuCl3 using electrolysis of an aqueous solution?
Wednesday, March 8, 2017 by Linda

Chemistry
What volume of N2O (s) will be generated if 3.13 g of NH4NO3 (s) decomposes at 1.00 atm and 50 degrees celsius, given the following decomposition reaction: NH4NO3 (s) --> N2O (g) + 2 H2) (l)?
Wednesday, March 8, 2017 by Lyndsay

Chemistry
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ---> 2 FeCO3 (s) + H4SiO4 (aq) how many grams of Fe2SiO4 (s) are required to completely react with 55.0 mL of .500 M H2CO3 (aq) ?
Wednesday, March 8, 2017 by Erin

Chemistry
Calculate the H+ concentration (M), the OH- concentration and the number of H+ and OH- per litre in solutions having pH value of 2.73
Wednesday, March 8, 2017 by Hindu

chemistry
Which of the following bases is the weakest? 1)(CH3)2NH , Kb = 5.1 x 10–4 2)ClO–, Kb = 2.9 x 10–7 3)SO42–, Kb = 8.3 x 10–13 Im thinking the answer is 2, but im not100%
Wednesday, March 8, 2017 by Anonymous

Chemistry
Second orbital is ......... Away from nucleus present Ina subshell that is represented by azimuthal quantum number = 3 will be
Wednesday, March 8, 2017 by Musab

Chemistry Help?
Can someone walk me through the steps on how to solve using these equations? Thank yoouuuu~~ 1.11g of methane CH4 is burned in a bomb calorimeter containing 1000 grams of water. The initial temperature of water is 24.85oC. The specific heat of water is 4.184 J/g oC. The heat ...
Tuesday, March 7, 2017 by GiGi

Chemistry
A second order reaction is 50 % complete in 16 minutes. How long will it take to be 82 % complete
Tuesday, March 7, 2017 by Larin

Chemistry
Given the reaction: Fe2SiO4 (s) + 2 H2CO3 (aq) ----> 2FeCO3 (s) + H4SiO4 (aq). How many grams of Fe2SiO4 are required to completely react with 55.0 mL of .500 M H2CO3 (aq)?
Tuesday, March 7, 2017 by Erin

Chemistry
What would be a good chemical blank to use for the Tollen's Test (Silver Mirror test)?
Tuesday, March 7, 2017 by Andy

Chemistry
WHAT ARE THE MAJOR SPECIES PRESENT IN A AQUEOUS SOLUTION OF 1.0M CH3C00H? I) CH3COOH II) H20 III) H30+ IV) CH3COO- VI) OH-
Tuesday, March 7, 2017 by Jennifer

Chemistry 30
How do i do this question?? A 10.00ml Sample was taken from a 2Liter Container of Tropicana Orange juice. This sample was analyzed for its citric acid content by titration with a known 0.1112M NaOH base solution. A Phenoolphthalein indicator was added to detect the endpoint ...
Tuesday, March 7, 2017 by Ellen

chemistry
At 983 torr of pressure, 1.62 grams of a gas dissolves in 2.0L of water at 10'C. What mass of gas will dissolved in 2.0L of water at 1432 torr and 10'C
Tuesday, March 7, 2017 by Jack

Chemistry
Write the equations for the reactions in which acids and bases are neutralized by the buffer consisting of HCOOH and HCOONa is a water solution in order to maintain a relatively constant pH of the solution?
Tuesday, March 7, 2017 by Amy

chemistry
1. 25.0mL of 0.20M Propanic acid (HC3H5O2, Ka = 1.3×10-5) is titrated using 0.10M NaOH. Calculate the following pH. Show your work. a. When 0.0 mL NaOH is added. b. When 25.0 mL NaOH is added c. When 50.0 mL NaOH is added d. When 75.0mL NaOH is added.
Tuesday, March 7, 2017 by fun

Science: Chemistry
What is the mass percent of oxygen in sodium bicarbonate(NaHCO3)?
Tuesday, March 7, 2017 by SaraK

chemistry
Calculate the concentration of all species in a 0.20 M KF solution.
Tuesday, March 7, 2017 by karen

Chemistry
Given that 10.0 atm each of NO and O2 are introduced into a reaction vessel at room temperature. Calculate the partial pressure of each gas at equilibrium. 2NO(g)+O2 (g)---> 2NO2 (g) Kp =4.2x1012. at. roomtemperature. To solve this question I need to find limiting reactant...
Monday, March 6, 2017 by Larin

Chemistry
Ross pours water at 6.0 C into a container with a pressure of 23. torr. He then boils the water to a temperature of 34 C. The volume changes to 18. mL and pressure to 78. torr. What was the initial volume of the water?
Monday, March 6, 2017 by Anonymous

chemistry
An empty beaker weighs 39.17 g. a) When completely filled with water, the beaker and its contents have a total mass of 406.25 g. What volume does the beaker hold? Use d =1.00 g/mL as the density of water. for A i got 367.08 but I don't know for this b) How much would the ...
Monday, March 6, 2017 by Jennifer

Chemistry
An unsealed 750 mL beaker contains 500 mL of very dense gas at 25.0 degrees C and 1.10 atm. The gas is much denser than the surrounding air, so it does not disperse into the air. (a) At constant pressure, what would the temperature have to reach for the gas to fill the beaker...
Monday, March 6, 2017 by Alexis

Chemistry
Ross pours water at 6.0 C into a container with a pressure of 23. torr. He then boils the water to a temperature of 34 C. The volume changes to 18. mL and pressure to 78. torr. What was the initial volume of the water?
Monday, March 6, 2017 by anon

Chemistry
When a person got onto an airplane, she brought with her a half-full 1.0000 L aluminum water bottle that was closed inside the airport at standard pressure and a temperature of 26.000 C. After the plane takes off and climbs to 36,000. feet, the cabin pressure is at 0.82000 atm...
Monday, March 6, 2017 by anon

Chemistry - Gravimetry
If 0.8000 g of a mineral yields 0.2400 g of NaCl + KCl, and this mixture contains 58.00% of Cl, what is the percentage of Na2O and K2O in the mineral? I already tried solving it and I got 12.69% Na2O and 3.84% K2O. However, I checked the answer key and the answers there are ...
Monday, March 6, 2017 by Denise

Chemistry
The element in the period 2 group 6 gains/ loses ______ electrons to become a cation/ anion?
Monday, March 6, 2017 by Mileena

Chemistry
Why doesn't acetylation occur twice on the same ring? Please help, I have no idea.
Monday, March 6, 2017 by Lyndsay

chemistry
help please write the phases for the following equation Sr(NO3)2+2KIO3+H2O-----> Sr(IO3)2*H2O+2KNO3 and also write the net ionic equation
Monday, March 6, 2017 by Alex

Chemistry Lab
*The decomposition of acetaldehyde is a first order reaction with a specific rate constant of 6.0 X 10^-1 / min. CH₃CHO --> CH₄ + CO 1. Calculate the initial rate when the concentration of acetaldehyde is 0.80M. 2. Calculate the time needed for the concentration of the ...
Sunday, March 5, 2017 by chemwizard

Chemistry Lab
*The decomposition of acetaldehyde is a first order reaction with a specific rate constant of 6.0 X 10^-1 / min. CH₃CHO --> CH₄ + CO 1. Calculate the initial rate when the concentration of acetaldehyde is 0.80M. 2. Calculate the time needed for the concentration of the ...
Sunday, March 5, 2017 by chemwizard

Chemistry Lab
*The decomposition of acetaldehyde is a first order reaction with a specific rate constant of 6.0 X 10^-1 / min. CH₃CHO --> CH₄ + CO 1. Calculate the initial rate when the concentration of acetaldehyde is 0.80M. 2. Calculate the time needed for the concentration of the ...
Sunday, March 5, 2017 by chemwizard

Chemistry
Identify the chemical reactants in ZnCl2(aq)+H2(g)?
Sunday, March 5, 2017 by Ed

Chemistry
Which pair of reactants will not react? Au(s) with Hg^2+ (aq) Pt^2+ (aq) with Au(s) Ag(s) with Cu(s) Au(s) -> Au^3+(aq) + 3e- Hg(s) -> Hg^2+(aq) + e- Pt(s) -> Pt^2+(aq) + 2e- Cu(s) -> Cu^2+(aq) + 2e- My guess is all of them, but I am not entirely sure.
Sunday, March 5, 2017 by anon

Chemistry
Using the following portion of the activity series for oxidation half-reactions, determine which element(s) can react with an acid to produce H2 gas. Co(s) → Co^2+ (aq) + 2e- Ni(s) → Ni^2+ (aq) + 2e − Sn(s) → Sn^2+(aq) + 2e - H2 (g) → 2H+ (aq) + 2e − Cu(s) → Cu^2...
Sunday, March 5, 2017 by anon

chemistry
Determine the order of reducing agents (strongest to weakest). A) Mn(s) > Zn(s) > Cr(s) > Fe(s) B) Fe(s) > Cr(s) > Zn(s) > Mn(s) C) Mn(s) > Fe(s) > Cr(s) > Zn(s) D) Zn(s) > Mn(s) > Cr(s) > Fe(s) I know the half reaction for the following: - ...
Sunday, March 5, 2017 by Anonymous

Chemistry
T/F The absorption lines of neon occur at slightly different wavelengths than its emission lines. My answer: I thought that they would have the exactly opposite wavelengths? Am I missing something?
Sunday, March 5, 2017 by Erika

Chemistry
Rank the bonds between the listed atoms from most ionic to most covalent: -AlO -CN -SCl -KF
Sunday, March 5, 2017 by Anonymous

chemistry
A mixture of H2(g) and N2(g) has a density of 0.221 g·L−1 at 301 K and 501 torr. What is the mole fraction composition of the mixture?
Sunday, March 5, 2017 by jay

chemistry
a piece of copper weighing 400g is heated to 100degree celsius and then quickly transfered to a copper calorimeter of mass 10g containing 100g of liquid of unknown specific heat capacity at 30 degree celsius.if the final temperature of the mixture is 50 degree celsius,...
Sunday, March 5, 2017 by joke

Chemistry
Does every neutral helium atom in the universe have the same set of absorption lines as every other neutral helium atom (with the same atomic mass)?
Sunday, March 5, 2017 by Jamie

Chemistry
draw the product of di-acetylation of biphenyl. Explain why acetylation does not occur twice on the same ring. I have no idea how to do this
Sunday, March 5, 2017 by Lyndsay

Chemistry
Calculate the number of moles of ZnCl, in 100mL of 3.00M solution.
Sunday, March 5, 2017 by Kim

chemistry
how many grams of NaCl required to prepare in 2500 ppm(w/v) NaCl 250 mL solution
Sunday, March 5, 2017 by lynda

chemistry
how to make 400 ml of 5% w/w h2so4
Sunday, March 5, 2017 by qwak

Chemistry
A metal, M, of atomic weight 96 u reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 10.9 g sample of the salt is dissolved in 100.0 g of water...
Saturday, March 4, 2017 by someone

Chemistry
Urea, which has the chemical formula (NH2)2CO, is a fertilizer that can be prepared by reacting ammonia (NH3) with carbon dioxide (CO2). Given the following chemical equation, what is the theoretical yield of urea (in grams) if 4.16 mol ammonia is the limiting reactant? 2 NH3(...
Saturday, March 4, 2017 by Jacob

Chemistry
what volume of .422 M NaOH must be added to .500L of .300 M acetic acid to raise its ph to 4.00 i know you have to use the henderson hasselbalch equation but im not sure which values i would use for the concentration portion of the equation. would i have to change the ...
Saturday, March 4, 2017 by Sean

chemistry
What is the temperature of a gas that has a volume of 555ml and 43.5 atm that was initially at 20 degrees, 885 ml and 2.9 atm
Saturday, March 4, 2017 by Anonymous

Chemistry
Calculate the new volume of 23.5 mL of N2 gas initially at 220k Pa and 98.7 degrees Celsius when converted to STP
Saturday, March 4, 2017 by Anonymous

Chemistry
A 25-mL sample of 0.160M solution of NaOH is titrated with 17 mL of an unknown solution of H2SO4 What is the morality of the sulfuric acid solution.
Friday, March 3, 2017 by Angela

chemistry
You measure out 3.00 mL of 0.100 M Co(NO3)2, place it in a test tube and add 7.00 mL of water. What is the concentration of the diluted solution in the test tube?
Friday, March 3, 2017 by Jessie

chemistry
In an experiment designed to determine the concentration of Cu+2 ions in an unknown solution, you need to prepare 100 mL of 0.10 M CuSO4 as your stock solution. How many grams of CuSO4(s) should you use?
Friday, March 3, 2017 by Jessie

Chemistry
At what temperature will 0.0100 mole of argon gas have a volume of 275 mL at 100.0 kPa?
Friday, March 3, 2017 by Utah

CHEMISTRY
*Consider a 0.15 m strontium chloride aqueous solution. a. Determine the molality (in m) of all solutes in the solution. Assume that strontium chloride completely ionizes when dissolved in water. All solutes means all cations and anions. The molality that you determine here is...
Friday, March 3, 2017 by JENNIFER

chemistry
For the reaction 2Na(s)+Cl2(g)→2NaCl(s)2Na(s)+Cl2(g)→​2NaCl(s), how many grams of NaCl could be produced from 20 L of Cl2Cl2 (at STP)?
Friday, March 3, 2017 by dave

Chemistry
Is is possible to get 100% on a percent yield? Now, For Cup A I had : Mass of cup water & stirrer: 67.51 mass of sodium bicarbonate: 1.00g mass of citric acid: .76g total mass of all: 69.27g mass of cup, solution, stir after reaction: 68.75g difference (CO2 mass) = 0.52 My ...
Thursday, March 2, 2017 by Rose

chemistry
3.05 g hydrated copper sulfate produces 1.94 g of anhydrous salt.Assuming complete removal of all water of crystallisation,determine tha formula of hydrated copper sulfate.
Thursday, March 2, 2017 by Joe

chemistry help ?!
Which of the following is an exothermic reaction? sugar dissolving in water <<my choice an explosion tea dissolving in water the cooling of an ice pack
Thursday, March 2, 2017 by bebe

Chemistry
What is the volume of a 5.2 molarity solution made with 115g of LiF? I've only learned in class how to go from volume to molarity. How do you do this one?
Thursday, March 2, 2017 by Emily

Chemistry
Nickel (Ni) is an element found in Group 10 of the periodic table of elements (see periodic table at the top of this quiz). Based on its location in the periodic table, which of these is a property of nickel? A Low density B Strong semi conductor C Highly reactive with other ...
Wednesday, March 1, 2017 by Elite

Chemistry
Calculate the number of H Atoms present in 0.125 g CH3OH
Wednesday, March 1, 2017 by Alisa

Chemistry
Calculate the mass in grams of 2.5*10^20 NO molecules
Wednesday, March 1, 2017 by Alisa

Chemistry
How many germanium atoms are present in 0.155g of the metal?
Wednesday, March 1, 2017 by Alisa

Chemistry
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was g/mL. If the number of...
Wednesday, March 1, 2017 by Eric

Chemistry
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. The density of the original, undiluted bleach unknown was g/mL. If the number of...
Wednesday, March 1, 2017 by Eric

Chemistry
The volume of 10 ml of H2SO4 solution was diluted 250 ml with distilled water. This resulting solution, 25 ml were neutralized by 10 ml of 0.1 mol/L solution of NaOH. calculate the Molarity of sulfuric acid.
Wednesday, March 1, 2017 by David

Chemistry
When 0.010 moles of Zn(s) reacts with 30.0 mL of 1.0 M HCl, the H2 gas produced is collected in a 1.0 L flask at a temperature of 270 K. What is the pressure (atm) of H2 gas collected? Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)
Wednesday, March 1, 2017 by Sarah

Chemistry
Would the percent yield of Ni(NH3)nCl2 be high, lower, or unchanged if you made the following procedural changes? a) You performed the synthesis reaction at 100 degrees instead of 60 degrees b) you dissolved the NiCl2*6H2O in 50 mL of distilled water instead of 10mL c) You did...
Wednesday, March 1, 2017 by Steve

Chemistry
When 0.010 moles of Zn(s) reacts with 30.0 mL of 1.0 M HCl, the H2 gas produced is collected in a 1.0 L flask at a temperature of 270 K. What is the pressure (atm) of H2 gas collected? Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g)
Wednesday, March 1, 2017 by Sarah

chemistry
25cm3 of a solution of NaOH required 28cm3 of 1.0mol/dm3 H2SO4 to neutralise it: a) write an equation for the reaction. b) how many molesof H2SO4 were needed? c) how many moles of NaOH were thus nuetralised?
Wednesday, March 1, 2017 by tinashe

Chemistry
When 0.010 moles of Zn(s) reacts with 30.0 mL of 1.0 M HCl, the H2 gas produced is collected in a 1.0 L flask at a temperature of 270 K. What is the pressure (atm) of H2 gas collected? Zn(s) + 2HCl(aq) à\longrightarrow ZnCl2(aq) + H2(g)
Wednesday, March 1, 2017 by Lauren

Chemistry
If the half life of a reaction A is 2 mins,how long will it take A to reach 25% of its initial concentration ?
Tuesday, February 28, 2017 by Nargis

Chemistry (Urgent)
Ksp of PbI2 at 25 degrees celcius and 15 degrees celcius is 7.5×10^-8 and 7.5×10^-9 respectively. (Pb=207 I=127) 1) write an expression for the equilibrium of PbI2 2)write an equation for the Ksp of PbI2 3)calculate the solubility of PbI2 at 25 degrees celcius in gdm^-3 4)...
Tuesday, February 28, 2017 by Isura

Chemistry
My school notes say : pH < pOH is acidic pH > pOH is basic Is this correct, I was thinking that if the pH is less than pOH than it was a basic solution
Tuesday, February 28, 2017 by Fay

Chemistry
Calculate the wavelength of nitrogen molecule travelling with a speed of 500 m/s
Tuesday, February 28, 2017 by Anonymous

Chemistry
If a chemical reaction uses 140 g of N2. How many moles is this? n=m/M
Tuesday, February 28, 2017 by Mileena

Chemistry
Suppose a student diluted and titrated a bleach unknown exactly as described in the experimental procedure, except only a single titration was performed which required 16.22 mL of 0.100 M Na2S2O3. Calculate the number of moles of Na2S2O3 used in the titration.
Tuesday, February 28, 2017 by Erin

CHEMISTRY: HESS'S LAW need help!
I'm just overly confused on how to begin this especially with the fractions... please show step by step if you could. Quiz very Soon! Example A: H2(g)+1/2 O2 (g) ----> H2O(l) ... ΔH= -285.8 kJ N2O5(g) + H2O(l) -----> 2HNO3(l) ΔH= -76.56 kJ 1/2 N2(g) + 3/2 O2(g) +1/2 H2...
Tuesday, February 28, 2017 by Madi

chemistry
what is the net ionic equation for AlBr3(aq) + 3LiOH(aq)
Tuesday, February 28, 2017 by esme

Chemistry
Use the concentrations and volumes of hydrogen peroxide and KI before mixing (Table 1), calculate the post-mixing concentrations. Before mixing: [H2O2] = 0.88M [KI] = 0.500M Table 1: before mixing 1. Vol H2O2 = 4.0 mL, [H2O2] = 0.88M 2. Vol KI = 1.0 mL, [KI] = 0.500 M units: M...
Tuesday, February 28, 2017 by Amanda

chemistry
THE QUESTION ASKS TO CALCULATE THE AMOUNT (IN GRAMS) OF CARBON DIOXIDE FROM THE AMOUNT OF SODIUM BICARBONATE THAT YOU USED IN THE REACTION Run 1. The reaction of citric acid and sodium bicarbonate is written as H3C6H5O7(aq) + 3 NaHCO3(aq) → Na3C6H5O7(aq) + 3 H2O(l) + 3 CO2(g...
Tuesday, February 28, 2017 by JENNIFER

Chemistry
Tooth enamel consist mainly of hydroxyapatite (Ca5(PO4)3(OH). When tine (II) Flouride is added to toothpaste it reacts with the enamel to product a more decay-resistant material fluorapatite (Ca(PO4)3F. The by-products of this reaction are tin (II) oxide and water. What mass ...
Tuesday, February 28, 2017 by Scott

Analytical Chemistry
A solution is prepared by dissolving 0.2222 (¡¾0.0002) g of KIO3 in 50.00 (¡¾0.05) mL. (i) Calculate the molar mass of KIO3 with its associated uncertainty to the correct number of significant figures. (ii) Find the molarity and its uncertainty with an appropriate number ...
Monday, February 27, 2017 by Matt

chemistry
Write the reactants and products of the reaction between zinc and oxygen. Include the half-reactions. What type of reaction is this? I know the reaction is 2Zn + O2 -> 2ZnO I am not really sure where to go from here.
Monday, February 27, 2017 by Anonymous

Chemistry
Calculate the mass of solid AgNo3 that can be added to 2.0 L of 0.10M K2CrO4 solution in order to just start precipitation? Here is what I have done so far: 2AgNO3(aq) + K2CrO4(aq) ==> Ag2CrO4(s) + 2KNO3(aq) Ag2CrO4(s) ===> 2Ag^+ CrO4^^2- Ksp = [Ag^+]^2[CrO4^2-] Ksp = (...
Monday, February 27, 2017 by Student12

chemistry
A student dissolves a .726 g aspirin tablet in water and titrates the solution with .272 M NaOH are required to reach the equivalence point. Calculate the percentage of acetylsaliclic acid in the tablet. I am not really sure where to start with this. I unfamiliar with problems...
Monday, February 27, 2017 by Aaron

Chemistry
Calculate ΔG at 25°C for the precipitation of lead(II) iodide from mixing 100. mL of 0.10 M lead(II) nitrate solution with 100. mL of 0.10 M sodium iodide solution. The ΔG° for this precipitation reaction at 25°C = −46.2 kJ/mol.
Monday, February 27, 2017 by DrBob21

Chemistry
Thanks to Dr. Bob for answering all these questions! I always do poorly on conceptual problems. Consider the following equilibrium system at 25°C and select the true statement below: H2PO4−(aq) + SO42−(aq) ↔ HSO4−(aq) + HPO42−(aq) ΔG°rxn > 0 at 25°C (1) this ...
Monday, February 27, 2017 by Richard

Chemistry
Silicon Carbide, SiC, is prepared by heating silicon dioxide in the presence of graphite. Carbon dioxide is the by-product of the reaction. How many grams of silicon carbide can be formed from the reaction of 50.0 grams fo graphite with 50.0 grams of silicon dioxide?
Monday, February 27, 2017 by Scott

Chemistry
Classify the reaction type (formation, simple composition, decomposition, combustion, single replacement, double replacement) and predict the balance equation 1. AL(s) + 02(g) ------> 2. Ag2O(s)------> 3. Br2(1) + KI(aq) ------->
Monday, February 27, 2017 by Mileena

Chemistry
Give an example of each of the following reactions, showing balanced equations for reactants= products and show s, I, g, or aq A.) synthesis B.) decomposition C.) single replacement D.) double replacement E.) neutralization F.) combustion
Monday, February 27, 2017 by Mileena

Chemistry
A scientist studying the reaction between decaborane (B10H18) and oxygen mixed 1.00 x 10^2 grams of decaborane with 2.75 x 10^2 grams of oxygen. Compute the masses of all substance present after the reaction went ot completion, generating B2O2 and water as the only products.
Monday, February 27, 2017 by Scott

Chemistry
Calculate the mass of solid AgNo3 that can be added to 2.0 L of 0.10M K2CrO4 solution in order to just start precipitation?
Monday, February 27, 2017 by Sarah

chemistry
The alcoholic fermentation of350 g/l glucose syrup ceases when the alcoholic degree of the mixture attains 16º (16ml ethanol in 100ml of the solution) Write the reaction of the fermentation reaction. Consider the fermentation of 100L of the glucose syrup. Determine the volume...
Monday, February 27, 2017 by angy

Chemistry
What is the approximate ratio of the solubility of CaSO4 (Ksp = 2.4 x 10−5) in pure water to the solubility of CaSO4 in 0.10 M Na2SO4 at the same temperature?
Monday, February 27, 2017 by bill

Chemistry 2
A scientist studying the reaction between decaborane (B10H18) and oxygen mixed 1.00 x 10^2 grams fo oxygen. Compute the masses of all substances present after the reaction went to completion, generating B2O3 and water as the only products.
Monday, February 27, 2017 by mike

chemistry
Help me conclude my lab experiment on formula of a hydrate.with the aim of determine the number of molecules of water associated with a hydrated inorganic salt
Monday, February 27, 2017 by tia

Chemistry
At 3745°C, K = 0.093 for the following reaction. N2(g) + O2(g) equilibrium reaction arrow 2 NO(g) Calculate the concentrations of all species at equilibrium for each of the following cases. (a) 2.0 g N2 and 3.0 g O2 are mixed in a 1.3-L flask. [N2] [O2] [NO] (b) 1.5 mol pure...
Monday, February 27, 2017 by Gloria

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