Friday
December 2, 2016

Homework Help: Science: Chemistry

Recent Homework Questions About Chemistry

Chemistry
Which of the following will contain more atoms: 12g of carbon or 12g of magnesium? Give a reason for your answer. Thanks
Tuesday, September 13, 2016 by Natt

chemistry
Arrange given metal in decreasing order of electrical conductivity ( Al ,Ag ,Hg ,K,Ca
Tuesday, September 13, 2016 by megha

Chemistry
A chemist wants to make 500.0 mL of 0.215M NaCl. What mass of NaCl is needed? would it be .500 L x .215 M = .1075 mol NaCl .1075 mol x 58.44g NaCl = 6.28g NaCl needed
Monday, September 12, 2016 by Anonymous

Chemistry
What volume of 12.1M HCl(aq) is required to make 435 mL of 0.100M HCl? would i just follow the equation V1xM1=V2M2 V1x12.1=.435Lx.100M = 0.00360 L
Monday, September 12, 2016 by Anonymous

chemistry
Silver chloride (AgCl) is a white solid. For the equilibrium reaction AgCl(s) = Ag+(aq) + Cl‐(aq) The Ksp for AgCl = 1.6 * 10‐10. At equilibrium, would you expect to have more silver and chloride ions or more solid silver chloride?
Monday, September 12, 2016 by lalalalala

biological chemistry
How many calories of heat are needed to increase the temperature of 55 g of ethanol from 18 Celsius to 48 Celsius
Monday, September 12, 2016 by Vickey

chemistry 102
what will happen if copper is overheated during the drying process? How will this affect the percent recovery?
Monday, September 12, 2016 by angela

chemistry
In an electrolytic solution the density of CuSO4 decreases or increases or remains constant?
Monday, September 12, 2016 by prashant

chemistry
Which is most acidic in its aqueous solution? a)FeCl3 b)AlCl3 c)NiCl3 d)BeCl2
Monday, September 12, 2016 by prashant

chemistry
on heating 25g of a saturated solution to dryness at 60c,4g of anhydrous salt was recovered.calculate it's solubility in grammes per 100g of solvent
Monday, September 12, 2016 by kyari

chemistry
When are more products of a reaction available initially than at equilibrium? A. K = 0 B. Q < K C. Q = K D. Q > K
Monday, September 12, 2016 by jessie

chemistry
Given the following solubility constants, which list arranges the solutes in order of increasing solubility? CaCO3: Ksp = 2.8 × 10-9 Ca(OH)2: Ksp = 5.5 × 10-6 CaSO4: Ksp = 9.1 × 10-6 CaF2: Ksp = 5.3 × 10-9 A. CaSO4 < Ca(OH)2 < CaCO3 < CaF2 B. ...
Monday, September 12, 2016 by jessie

chemistry
Given the equilibrium concentrations in the table, what is the equilibrium constant for the synthesis of ammonia at this temperature? 3H2(g) + N2 2NH3(g) A. 0.0035 B. 0.014 C. 0.066 D. 0.017
Monday, September 12, 2016 by jessie

chemistry
What change do you expect if the value of the reaction quotient is greater than the value of the equilibrium constant? A. The rate of the forward reaction is greater than the rate of the reverse reaction. More reactant forms. B. The rate of the forward reaction is greater than...
Monday, September 12, 2016 by jessie

chemistry
Which of the following is true about the results of a neutralization reaction? A. An acid and a base form water and salt. B. Water reacts with a base to form the hydroxide ion. C. Water reacts with an acid to form the hydronium ion. D. An acid and a base dissociate into their ...
Monday, September 12, 2016 by jessie

chemistry
What does a buffer do? A. It resists a change in pH when H+ or OH- is added to a solution. B. It prevents an acid-base reaction from happening. C. It prevents an acid or base from being neutralized. D. It prevents a salt from forming in solution.
Monday, September 12, 2016 by jessie

chemistry
Why is HCl required in the stomach? A. To transport proteins into the small intestines B. To help absorb other acids in the stomach C. To catalyze the digestion of carbohydrates D. To aid in the digestion of proteins
Monday, September 12, 2016 by jessie

chemistry
The [OH-] ion concentration of a sample is 1 × 10-10 M. What is the concentration of [H+] in the sample at 25°C? A. 1 × 10-14 M B. 1 × 10-4 M C. 1 × 10-10 M D. 1 × 10-6 M
Monday, September 12, 2016 by jessie

chemistry
Which of the following chemical reactions represents a neutralization reaction? A. CH4 + 2O2 CO2 + H2O B. HCl + NaOH H2O + NaCl C. NH3 + H2O NH4++ OH- D. CH3COOH + H2O CH3COO- + H3O+
Monday, September 12, 2016 by jessie

Chemistry
When 1.5 grams of salt are added to 12.0 grams of water and the salt dissolves, what is the mass of the system?
Sunday, September 11, 2016 by Ben

Chemistry
Sodium + Sulfuric Acid and Phosphoric Acid + Magnesium Hydroxide a.write the formula b. supply the product c.type of reaction d. balancing
Sunday, September 11, 2016 by Lance

chemistry
Okay so i have this titration question and I don't really know the steps because everyone explains it differently. IF someone could explain me the steps of how i could solve this questions and other like this. Thanks In three runs of titration 22.8mL, 221.mL, 22.2mL of 0....
Sunday, September 11, 2016 by Sherry

Chemistry
home / study / science / chemistry / questions and answers / a subtilisin with an active site mutation of his ... Question: A subtilisin with an active site mutation of His t... EDIT QUESTION A subtilisin with an active site mutation of His to Ala had a substantially decreased...
Sunday, September 11, 2016 by Anonymous

Chemistry
A rectangular solid of unknown density is 6cm long, 3cm high, and 7cm wide. The mass of this solid is 250g. Calculate the density.
Sunday, September 11, 2016 by Shay

Chemistry
An enzyme has velocities of 0.11 nmol/min at a substrate concentration of 1 μM, 0.34 nmol/min at a substrate concentration of 5 μM, and 0.45 nmol/min at a substrate concentration of 10 μM. What is the Vmax for the enzyme if the KM is 5 × 10–6 M? A. 0....
Sunday, September 11, 2016 by Anonymous

chemistry
At 1 atm, how much energy is required to heat 51.0 g of H2O(s) at –16.0 °C to H2O(g) at 125.0 °C?
Sunday, September 11, 2016 by lexy

chemistry
Which of the following is true about the results of a neutralization reaction? A. An acid and a base form water and salt. B. Water reacts with a base to form the hydroxide ion. C. Water reacts with an acid to form the hydronium ion. D. An acid and a base dissociate into their ...
Sunday, September 11, 2016 by jessie

chemistry
What is the general form for the simplest type of acid-base reaction? A. acid + base salt + water B. acid + base base + acid C. acid + base H+ + OH- D. acid + base solid + water
Sunday, September 11, 2016 by jessie

chemistry
A, B, C, and D are 4 salts whose Ksp values are 9.21 × 10-8, 7.44 × 10-11, 1.07 × 10-21, and 38.65, respectively. What is the correct arrangement of their solubilities in decreasing order? A. D, A, B, C B. C, B, A, D C. A, B, D, C D. C, B, D, A
Sunday, September 11, 2016 by jessie

chemistry
Acetic acid is known to be a weak acid. What will happen to the acidity of the solution when sodium acetate is added to acetic acid? A. The solution will become more acidic. B. The pH will remain the same. C. The solution will become less acidic. D. The solution will become ...
Sunday, September 11, 2016 by jessie

chemistry
Which of the following bases could you write an equilibrium expression for? A. Ba(OH)2 B. KOH C. NaOH D. NH3
Sunday, September 11, 2016 by jessie

chemistry
During a chemical reaction, if Q = K, what can be said about the reaction? A. The reaction still proceeds in both directions, but the net result is that the reactant and product concentrations do not change. B. The amount of product is always equal to the amount of reactant. C...
Sunday, September 11, 2016 by jessie

chemistry
Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a common ion. Hi, I know...
Sunday, September 11, 2016 by jessie

chemistry
Which equation would describe the following equilibrium constant? Kc = [Bi3+]2[S2-]3 A. Bi2S3(s) + 6HCl(aq) 2BiCl3(aq) + 3H2S(aq) B. Bi2S3(s) 3Bi2+(aq) + 2S3-(aq) C. BiS(s) Bi3+(aq) + S2-(aq) D. Bi2S3(s) 2Bi3+(aq) + 3S2-(aq)
Sunday, September 11, 2016 by jessie

chemistry
What happens to the following reaction at equilibrium if the pressure is decreased? 2H2(g) + O2(g) 2H2O(g) A. The equilibrium shifts left because Q < K. B. The equilibrium shifts right because Q < K. C. The equilibrium shifts right because Q > K. D. The equilibrium ...
Sunday, September 11, 2016 by jessie

chemistry
What is the equilibrium expression for the change when iron(II) chloride dissolves? FeCl2(s) Fe2+(aq) + 2Cl-(aq)
Sunday, September 11, 2016 by jessie

Chemistry
When a 0.326 g sample of FeCl2·xH2O is heated to remove all water, a mass of 0.254 g remains. Determine the value of x.
Sunday, September 11, 2016 by Veronica

Chemistry
After you preform your experiment, you determine that the Kf value for naphthalene is 6.89 °C/m . You are using 10g of naphthalene and added 1.0 g of your unknown. The the freezing point of the solvent decreased by 4.42 °C when the unknown was added. Knowing this ...
Sunday, September 11, 2016 by Claire

Chemistry
How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at -17 oC? Kf = 1.86 oC/m. I got 163.96 or 164 for my answer but that isn't correct and I don't know what I'm doing wrong.
Sunday, September 11, 2016 by Claire

chemistry
calculate number of ions of chloride in 444g of calcium chloride
Sunday, September 11, 2016 by priya Gahlot

chemistry
Acetylene (C2H2) burns with oxygen it gives CO2 and H2O. Write down it's Skelten equation?
Sunday, September 11, 2016 by rahil yadav

Chemistry
Calculate the mass and moles of iodine that reacted in the formation of 2.7132 grams of ZnI2. im slighty confused about the use of iodine, would it be diatomic in the equation for example would i use the conversion 1 mol ZnI2 = 1 mol I2 or 1 mol ZnI2 = 2 mol I
Sunday, September 11, 2016 by Anonymous

Chemistry
How many milliliters of a 0.48 M HCl solution are needed to react completely with 7.4 g of zinc to form zinc(II) chloride? Answer in units of mL.
Saturday, September 10, 2016 by Sam

Physical Chemistry
5. Assume you have a 45°C 100g block of gold (cp=0.129J/g°C) and a 150°C , 150g block of silver (cp=0.240J/g°C)(1). You place these blocks into an adiabatic container in thermal contact. a. Calculate the final temperature b. Calculate the heat transferred c. ...
Saturday, September 10, 2016 by Anonymous

chemistry
Which of the following is an ortho directing group? a) CN b) CO2Me c) OMe d) NO2 I have drawn most of them out, CN has no delocalised electrons to contribute e- density hence EWG. For NO2 inductive effect is strong and hence is a EWG and meta directing. OME EDG -> Ortho im ...
Saturday, September 10, 2016 by jess

Chemistry
Your lab partner tells you that he has prepared a solution that contains 1.5 moles of NaOH in 1.5 L of aqueous solution, and therefore that the concentration of NaOH is 1.5 M. (a) Is he correct (b) If not what is the correct concentration
Saturday, September 10, 2016 by John

Chemistry (equilibrium)
C2H6(g) <=> C2H2(g) + 2 H2(g) The ΔH° for the reaction above is +312 kJ. The system is initially at equilibrium. In which direction will the reaction shift in each of the following situations? e) The temperature is decreased. g) He is added at constant volume. h...
Saturday, September 10, 2016 by Paige

science ap chemistry
What is the equilibrium expression for the following acid dissociation reaction? CH3COOH + H2O CH3COO- + H3O+ A. [CH3COO-][H3O+]/[CH3COOH][H3O] B. [CH3COOH][H2O]/[CH3COO-][H3O+] C. [CH3COOH]/[CH3COO-][H3O-] D. [CH3COO-][H3O+]/[CH3COOH]
Saturday, September 10, 2016 by jessie

chemistry help
Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a common ion.
Saturday, September 10, 2016 by emma

chemistry help
During a chemical reaction, if Q = K, what can be said about the reaction? A. The reaction still proceeds in both directions, but the net result is that the reactant and product concentrations do not change. B. The amount of product is always equal to the amount of reactant. C...
Saturday, September 10, 2016 by emma

chemistry help
How does too little acid cause gastric distress? A. More than enough acid is present to digest proteins, resulting in inadequate digestion of proteins. B. The pH of the stomach becomes so high that proteins are not digested properly. C. The pH of the stomach becomes so low ...
Saturday, September 10, 2016 by emma

chemistry
Which of the following statements is true of a solution at pH 7? A. Kw and Kb are equal. B. Kw and Ka are equal. C. Kw, Ka and Kb are equal. D. Ka and Kb are equal.
Saturday, September 10, 2016 by emma

Chemistry
What is the name of the compound NO3. (Not NO3-, nitrate)???? Please help!
Saturday, September 10, 2016 by Ashley

chemistry
Which of the following is true about the results of a neutralization reaction? A. An acid and a base form water and salt. B. Water reacts with a base to form the hydroxide ion. C. Water reacts with an acid to form the hydronium ion. D. An acid and a base dissociate into their ...
Saturday, September 10, 2016 by emma

chemistry
A precipitate of copper(II) hydroxide is formed in a reaction. What change will help to dissolve the copper(II) hydroxide? Cu^2+(aq) + 2OH^-(aq) Cu(OH)"subtext"2(s) A. Adding NaOH B. Adding HCl C. Removing CuCl2 D. Removing H2O is the answer for this d? removing H2O??
Saturday, September 10, 2016 by emma

chemistry
Which of the following is true of the solubility product constant? A. It is the product of the initial concentrations of the ions in a solution. B. It is an equilibrium constant. C. It is an equilibrium position. D. Its value changes in the presence of a common ion.
Saturday, September 10, 2016 by emma

chemistry
What happens to the following reaction at equilibrium if the pressure is decreased? 2H"subtext"2(g) + O"subtext"2(g) 2H"subtext"2O(g)
Saturday, September 10, 2016 by emma

chemistry
Which statement describes a chemical reaction at equilibrium? A. The forward reaction happens slightly faster than the reverse reaction. B. The reaction has stopped because all reactants have been used up. C. The forward reaction happens at the same rate as the reverse ...
Saturday, September 10, 2016 by emma

chemistry
A 1.272 g sample of a mix Na2CO3 and NaHCO3 vol of 0.24 N HCl required for PP end point 26.92 ml after the addition 52.21 ml more of the HCl and boilling out CO2 the vol of 0.12 NaoH required to give a pink colour to the soln = 4 ml
Saturday, September 10, 2016 by naara

math or chemistry
5.4 x10^-2 by 2.5 x10^-3 by 7.9 x10^-3m volume = 106.65 x10-8m^3 Check pls yesterday you said 106.65 x10^-6. If you add 2+3+3 you get 8 is that right? Just want to make sure I'm doing it right. Thank you. I may have witten it differently.
Saturday, September 10, 2016 by lulu

chemistry
Vinegar is a solution of acetic acid, a weak acid. How can you produce more acetate ions in the solution? CH 'subtext' 3 COOH(aq) H+(aq) + CH 'subtext' 3 COO^- (aq) A. Evaporate some of the water. B. Decrease the pressure. C. Increase the volume of the ...
Saturday, September 10, 2016 by emma

Chemistry
How does hybridisation of PCL5 change when it is decomposed to PCL3 and Cl2?
Saturday, September 10, 2016 by Boron

chemistry
Sig figs 33.067. 5 sig figs .0908. 3sig figs 1099. 4 .0087. 2 check pls
Saturday, September 10, 2016 by lulu

math or chemistry
Check pls. 5.4 x 10^-2 by 2.5 x 10^-3 by 7.9 x10^-3 m volume = 107.44 x 10^-8 m^3
Saturday, September 10, 2016 by lulu

chemistry
05 mL of sample water needs10.9 mL .01M EDTA solution. what is the accurate Hardness of sample in CaCO3 (mg/L)? pls expalin.
Saturday, September 10, 2016 by sm.feroj

Chemistry
For my lab, I have been asked to calculate the pKa of an unknown amino acid. We titrated the unknown amino acid with NaOH. The pKa needs to be calculated using the Henderson Hasselbach Equation. Obviously you can just get the pH from any point on the graph but what values do ...
Friday, September 9, 2016 by Eleanor

Chemistry urgent please
How much mL of dilute nitric acid is needed to add in control solution in chloride limit test in sodium hydroxide sample???can u please give me Answer urgently??
Friday, September 9, 2016 by Palakpatel

Chemistry
The density of an unknown gas is 1.23 g/L in 330K and temperature 25.5 pressure kPa. What is the molar mass of the substance?
Friday, September 9, 2016 by MONICA

Chemistry
Ammonia is composed of hydrogen and nitrogen in a ratio of 9.33 g of nitrogen and 2.00 g of hydrogen. if a sample of ammonia contains 6.28 g of hydrogen, how many grams of nitrogen does it contain?
Friday, September 9, 2016 by Kelsey Walenciak

chemistry
Which of the following reactions have a positive delta S rxn? check all that apply 1) A(s)+2B(g) -->C(g) 2) 2A(g)+3B(g) -->4C(g) 3) 2A(g)+2B(g) -->5C(g) 4) 2A(g)+B(s) -->3C(g) Not sure how to tell if the reaction is positive.
Friday, September 9, 2016 by ang123

Chemistry
Calculate the degree of dissociation and oh conc in 0.1m (nh4)3po4 having alpha 50%
Friday, September 9, 2016 by Sudiksha soni

Chemistry(please check my answer)
The transuranium elements A. are the elements with atomic numbers above 92. *** B. occur in nature. C. are sometimes radioactive. D. all of the above
Friday, September 9, 2016 by Cherry

chemistry
If 100 g of butane are reacted with unlimited amounts of oxygen, how much carbon dioxide (in grams) and how much water (in grams) should form?
Friday, September 9, 2016 by Greg H

Chemistry
What changes of state are involved in this use of ethyl chloride? Select all that apply. Select all that apply. 1-liquid to gas 2-liquid to solid 3-gas to solid 4-liquid to solid 5-solid to liquid 6-solid to gas
Friday, September 9, 2016 by Sam

Chemistry
2CO(g) + O2(g) -> 2 CO2(g). What volume of oxygen is required at 25 degrees celcius? This is all the information the question come with, and I am not sure if there might be something missing?
Friday, September 9, 2016 by Gill

chemistry
a) What is fellesioneffekten?   Veronal is a barbiturate (structure see above). Barbiturates is a substance class which occur in a variety of drug classes, including sleep medications (hypnotikasedativa), in painkillers (anesthetics) and anticonvulsants. A barbiturate is ...
Friday, September 9, 2016 by Maria

Chemistry
2CO(g) + O2(g) -> 2 CO2(g). What volume of oxygen is required at 25 degrees celcius? This is all the information the question come with, and I am not sure if there might be something missing?
Friday, September 9, 2016 by Gill

Chemistry
2CO(g) + O2(g) -> 2 CO2(g). What volume of oxygen is required at 25 degrees celcius? This is all the information the question come with, and I am not sure if there might be something missing?
Friday, September 9, 2016 by Gill

chemistry
a) What is fellesioneffekten?   Veronal is a barbiturate (structure see above). Barbiturates is a substance class which occur in a variety of drug classes, including sleep medications (hypnotikasedativa), in painkillers (anesthetics) and anticonvulsants. A barbiturate is ...
Friday, September 9, 2016 by Maria

chemistry
In quality control of raw materials for pharmaceutical production often used foul reactions to prove that raw materials in salt form containing the appropriate salt. Hydrochloride (eg. Amitriptyline hydrochloride) can be detected for example by precipitating the chloride ions...
Friday, September 9, 2016 by Maria

chemistry
Cocaine is a weak base (Figure see below) with pKb = 5.59. Cocaine has local anesthetic effect (local anesthetic) but is also a narcotic.   a) Calculate the ratio of the concentration of cocaine and its conjugated acid in a solution which has. pH = 7.40 (that of blood) ...
Friday, September 9, 2016 by Maria

chemistry
To create a 0.1 M carbonate buffer pH = 10.2. You choose to use a combination of HCO3- / CO32-. This buffer system has pKa = 9.9.   a) Calculate how much you need to weigh in each of the sodium salts, NaHCO3 and Na2CO3, to create 1.0 L carbonate (with total concentration ...
Friday, September 9, 2016 by Maria

chemistry
a) Hva er fellesioneffekten? Veronal er et barbiturat (struktur se over). Barbiturater er en stoffklasse som forekommer i en rekke legemiddelgrupper, blant annet i sovemedisiner (hypnotikasedativa), i smertestillende (anestetika) og i antiepileptika. Et barbiturat er en svak ...
Friday, September 9, 2016 by Maria

chemistry
Calculate the pH reaches 30.0 mL one 0.200 M solution of HCl salt of amitriptyline is added 100.0 mL of a NaOH solution of concentration 80 mM.
Friday, September 9, 2016 by Maria

chemistry
Calculate the pH at 25 ° C when 120 mL of a HCl solution having a concentration of 50 mM is added 50.0 mL of a 120 mM ephedrine solution. Assume no change in temperature.   Amitriptyline is a drug used in treating depression. It is typically formulated as the ...
Friday, September 9, 2016 by Maria

chemistry
presentation Tasks:  Ephedrine (structure see below) is a natural product that is used as a medicine in the treatment of asthma. The corresponding acid to ephedrine have pKa = 9.60 at 25 ° C.   Question:  Calculate the pH reaches 991 mg ephedrine ...
Friday, September 9, 2016 by Maria

Chemistry
I have a homework question that says: "Three resonance structures of the following anion are possible. One is given below, but it is incomplete. Complete the given structure by adding non-bonding electrons and formal charges. Draw the two remaining resonance structures, ...
Thursday, September 8, 2016 by Anne

chemistry
Why one mole of sulfuric acid needs two moles of sodium hydroxide explain by avogadro's concept?
Thursday, September 8, 2016 by Dawood Ahmed

Chemistry
What is the osmotic pressure of blood plasma at 37°c
Thursday, September 8, 2016 by Abhishek

chemistry
The oxidation of NO by O3 is first order in each of the reactants, and its rate constant is 1.5 ´ 107 M-1·s-1. If the concentrations of NO and O3 are each 5.0 ´ 10-7 M, what is the rate of oxidation of NO in M·s-1?
Thursday, September 8, 2016 by Anonymous

chemistry
The oxidation of NO by O3 is first order in each of the reactants, and its rate constant is 1.5 ´ 107 M-1·s-1. If the concentrations of NO and O3 are each 5.0 ´ 10-7 M, what is the rate of oxidation of NO in M·s-1?
Thursday, September 8, 2016 by hanie

chemistry
How many grams of nacl are required to completely neutralize 100 ml of 1M h2so4?
Thursday, September 8, 2016 by joe

Chemistry
Why is it that copper (II) sulfate with barium hydroxide --> copper hydroxide (solid) + barium sulfate (solid)? According to the solubility rules given to me by my professor, both are insoluble, and therefore should be labeled as solids. Is there something I'm missing ...
Thursday, September 8, 2016 by Tom

Chemistry
Why is it that copper (II) sulfate with barium hydroxide --> copper hydroxide (solid) + barium sulfate (solid)? According to the solubility rules given to me by my professor, both are insoluble, and therefore should be labeled as solids. Is there something I'm missing ...
Thursday, September 8, 2016 by Tom

AP Chemistry
The reaction of 5.7 grams of fluorine with excess chlorine produced 7.6 grams of ClF3. What percent yield of ClF3 was obtained? Answer in units of %.
Wednesday, September 7, 2016 by Rachel

Chemistry
A saline solution used in intravenous drips for patients who cannot take oral fluids contains 0.92% (w/v) NaCl in water. How many grams of NaCl are contained in 250 mL of this solution? So wouldn't it just be .92%= .92 grams x 250ml.../100= 2.3 g NaCl?
Wednesday, September 7, 2016 by Petey

Chemistry
Larry has 250.00 ml of water. The water currently holds the maximum amount of soluble Silver iodide. In a separate container, Larry has 96 ml of a 0.07M solution of sodium carbonate. He wants to precipitate out all of the silver. Of his 96 ml, how much will he have to pour ...
Wednesday, September 7, 2016 by John

Chemistry
Using a closed system experiment will a leak during gas evolving reaction overstate or understate the amount of sodium bicarbonate in an alka seltzer cold tablet?
Wednesday, September 7, 2016 by Anonymous

Chemistry
Element X has 6 protons, 8 neutrons, and 6 electrons. Predict the atomic mass of element X?
Wednesday, September 7, 2016 by Anonymous

chemistry
How do you seperate this into ions Na2B4O7
Wednesday, September 7, 2016 by byu

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