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The pH of a solution changes from 5.5 to 3.5.This indicates that the [OH−] of the solution has 1. increased by a factor of
1. 4 answers
2. asked by susan
3. 1,928 views
A solid acid is dissolved in enough water to make 200 ml of a solution. 40.0ml of the solution is titrated to a phenolphthalein
1. 5 answers
2. asked by Aria
3. 1,446 views
Rank following acids frommost to least acidic:hydrocyanic acid (HCN) Ka = 6.2 × 10−10 hypoiodous acid (HOI) Ka = 2 × 10−11
1. 4 answers
2. asked by susan
3. 1,964 views
how can you calculate the net charge of an ion if you know the number of protons, neutrons, and electrons it contains?
1. 4 answers
2. asked by rica
3. 2,470 views
A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After
1. 5 answers
2. asked by jesse
3. 4,245 views
Which of the following is an acid base reaction?C(s) + O2(g) → CO2(g) MgSO4(aq) + Ba(NO3)2(aq) → Mg(NO3)2(aq) + BaSO4(s) 2
1. 5 answers
2. asked by yr
3. 6,824 views
Explain why water (H2O) boils at 100 oC whereas H2S boils at -61 oC, even though sulfur has a higher atomic weight than oxygen.
1. 4 answers
2. asked by lyan
3. 625 views
Suppose that 0.490 mol of methane, CH4(g), is reacted with 0.640 mol of fluorine, F2(g), forming CF4(g) and HF(g) as sole
1. 3 answers
2. asked by khari johnson
3. 1,343 views
The periodic table is arranged by various patterns. Is there a pattern with regard to ionic charge? In three to five sentences,
1. 3 answers
2. asked by Anonymous
3. 332 views
i don't get how to do molar conversions?I hope this helps. 1.) Go to google. 2.) Type in molar conversions 3.) Click on the
1. 1 answer
2. asked by gabby
3. 392 views
have been asked to write how i got this equation but i cant put it in words can you help meAl2 Se3 +6 H2O ==> 2Al (OH)3 +3H2Se i
1. 1 answer
2. asked by donald
3. 490 views
what is the balanced equation for thereaction of aluminum selenide with water including the physical states reactants and
1. 1 answer
2. asked by donald
3. 874 views
can anybody give me the density of arsenic oxide at STPis this the correct formula volume = mass/ density thanks Yes, but if you
1. 1 answer
2. asked by bex
3. 1,069 views
which element results if 2 protons and 2 neutrons are ejected from a radium nucleus with atomic num 88 and mass num 226how do i
1. 1 answer
2. asked by bex
3. 1,183 views
if i am trying to find the diameter of an oil molecule and express my answer in scientific notation.the info is drop of oil 0.05
1. 1 answer
2. asked by bex
3. 532 views
please could you tell me how i would draw an hydrogen atom which has only one electron and describe why it has so many spectral
1. 1 answer
2. asked by bex
3. 521 views
I have seen on the chemistry answers that a symbol is used please can you tell me what it means they are the upside veg Na^ and
1. 1 answer
2. asked by bex
3. 573 views
Could anybody help me with this question"In practice the methanol production process is operated at temperatures of 250 to 300
1. 1 answer
2. asked by bex
3. 558 views
can anybody explain why and how a copper based catalyst helps in methonal production and the impact it would have on mass
1. 1 answer
2. asked by bex
3. 372 views
hellohow would i draw a monomer CH2-CHCH=CH2 I have to draw three monomer units can anyone help
1. 1 answer
2. asked by bex
3. 388 views
how would i draw a structual formula of the products of the complete hyrolosis of tocainideO CH3-N-C-CH-NH2 CH3 H CH IM told
1. 1 answer
2. asked by bex
3. 403 views
Is this the stuctual formula for hydolosis of tocainideCH3 NHCOCH^2N(C^2H^3)^2 CH3 WITH THE HEXAGON LINKING THE 2 X CH3
1. 1 answer
2. asked by bex
3. 404 views
what is the strongest acid here?H2SO3 H2SO4 H2SeO3 H2SeO4 For oxyacids, the acidity increases with increasing number of oxygen
1. 3 answers
2. asked by luis
3. 4,958 views
what is sulfur and what are the uses please make it simple as possible:D
1. 3 answers
2. asked by joe
3. 240 views
what is the concentration of [H+} in molars, millimolars, and micromolars for a solution of pH 5?In case you need this
1. 2 answers
2. asked by alex
3. 1,208 views
Ag+(aq) + e- ---->help me finish it.
1. 1 answer
2. asked by becci
3. 386 views
Why do gases deviate from ideal behavior at very high pressures?
1. 1 answer
2. asked by mike
3. 393 views
a 445 g sample of ice at -58 degrees celcious untill its temperature reaches -29 degrees celcius. find the change in heat
1. 2 answers
2. asked by daniel
3. 510 views
Under what conditions of temperature and pressure do you think that the gas laws would work best? Please be specific
1. 1 answer
2. asked by Anonymous
3. 364 views
I have no idea how to do this activity..can someone please help!?In this activity you will investigate how chemical reactions
1. 3 answers
2. asked by Ethan
3. 549 views
What is the ratio of the average velocity ofhydrogen molecules to that of neon atoms at the same temperature and pressure?
1. 2 answers
2. asked by someone
3. 1,087 views
put in decreasing freezing point 0.10m Na3PO4,0.35m NaCl,0.20 m MgCl2, 0.15 m C6H12O6,0.15 m CH3COOH
1. 4 answers
2. asked by Anonymous
3. 1,501 views
When 50.0 ml of 1.00 M KOH is reacted with 50.0 ml of 1.00 M HCL, the temperature rose from 20.0 degrees celsius to 28.7 degrees
1. 1 answer
2. asked by gary
3. 368 views
If 55.0 grams of KCIO3 is decomposed by the following equation, how many grams of oxygen can be produced?2 KCIO3 > 2 KCL + 3 O2
1. 1 answer
2. asked by gary
3. 395 views
Find e/m for electrons in an experiment in which H=2.68 gauss, S=5.00 cm, E=6.3x10^10 volts/cm, and 0=0.100 radian.the 0 in
1. 1 answer
2. asked by Shelby
3. 326 views
as a system increases in volume it absorbs 52.5 j of energy in the form of heat form the surroundings. the piston is working
1. 2 answers
2. asked by Jay
3. 534 views
Nitric acid,HNO3, is available ata a concentration of 16 M. how much would react with 5.58 g of KOH acording to the following
1. 2 answers
2. asked by nicole
3. 584 views
what voule of 12M hydrochloric acid must be diluted with distilled water to prepare 5.0L of 0.10M HCl?
1. 3 answers
2. asked by Cassie
3. 1,024 views
calculate the percent by mass of carbon(c) in the amino acid arginine,C6H16N4.
1. 3 answers
2. asked by michelle
3. 742 views
Give the complete ionic equation for the reaction (if any) that occurs when aqueous solutions of MgSO3 and HI are mixed. 2
1. 3 answers
2. asked by Anonymous
3. 1,805 views
what is the balance equation of CH3COOH(aq)+NH3(aq)
1. 2 answers
2. asked by yr
3. 1,076 views
could freezing point depression be used for substances not soluble in water?
1. 3 answers
2. asked by Anonymous
3. 545 views
Consider the reaction between sodium metal and chlorine gas to form sodium chloride (table salt).2Na(s) + Cl2(g) 2NaCl(s) If 3.6
1. 4 answers
2. asked by amy
3. 2,368 views
A 853 solution is diluted to a volume of 1.50 and a concentration of 7.00 . What was the initial concentration? PLEASE HELP
1. 1 answer
2. asked by lola
3. 314 views
what is the final concentration of a solution if 100mL of water is added to a 25mL of 5.0 M NaCl?
1. 2 answers
2. asked by mandy
3. 478 views
Q3) Consider a 10 L container at 0 oC with 40 grams of He and 40 grams of Ar gases:a) Calculate the partial pressure of Ar in
1. 1 answer
2. asked by lyan
3. 388 views
Q4) Suppose you prepare 950 mL of a solution by dissolving 100 grams of NaCl in 900 mL of water. Assuming the density of pure
1. 2 answers
2. asked by lyan
3. 1,329 views
Q5) The reaction for the combustion of propane is as follows:C3H8 + 5O2 ---->>3CO2 + 4H2O 1. If 20.0 g of C3H8 and 20.0 g of O2
1. 2 answers
2. asked by lyan
3. 1,259 views
Q1) A solution of ascorbic acid (C6H8O6, Formula mass = 176 g/mol) is made up by dissolving 80.5 g of ascorbic acid in 210 g of
1. 4 answers
2. asked by lyan
3. 1,559 views
Q2) If 0.327 moles of H2S effuses in 462 seconds, how many seconds would it take for the same number of moles of CH3Cl to
1. 1 answer
2. asked by lyan
3. 392 views
Q6) A 10 L container contains a mixture of 0.8 g of He and 8 g of Ar at 0 oC.a) (1 pt) Calculate the total pressure of the gas
1. 2 answers
2. asked by lyan
3. 554 views
volumeof oxygen produced if 130.0g of water is completely decomposed at STP?
1. 1 answer
2. asked by mike john
3. 316 views
The molar heat capacity of silver is 25.35j/mol C . How much energy would it take to raise the temperature of 9.30 grams of
1. 4 answers
2. asked by help
3. 1,032 views
what volume of hydrogen gas at STP can be produced by reacting 15.0 grams of uluminum with sulfuric acid? the equation is: 2Al+
1. 2 answers
2. asked by kim
3. 548 views
calculate the delta H when 0.150 mmol of AgCl dissolves in water?
1. 3 answers
2. asked by samadhi kandekumbura
3. 565 views
When a substance changes from one phase to another, which of the following occurs?the substance loses or gains heat the average
1. 3 answers
2. asked by Tasia
3. 785 views
how many liters of oxygen can be produced at stp from the decomp. of .25 liters of 3M H2O2 ACCORDING TO THE REACTION 2H2O-2
1. 2 answers
2. asked by chris
3. 483 views
What is ΔGo at 1000 oC for the following reaction?CaCO3 (s) CaO (s) + CO2 (g)
1. 1 answer
2. asked by laquisha
3. 1,021 views
how many grams of cai2 are present in 3.28 moles?Can someone explaine how to do this question as well?
1. 3 answers
2. asked by omar
3. 716 views
how many ml of a .1M HCl are required to react completely with 1 gm mixture of Na2CO3 ?
1. 2 answers
2. asked by swati
3. 514 views
A 21.00 sample of 0.3254M Hcl solution requires 26.09 ml of NaOH solution for complete neutralization.Calculate the volume of
1. 2 answers
2. asked by ashley
3. 497 views
how to prepare 40% of Nitric acid from 70% of the Nitric acid solution
1. 2 answers
2. asked by meena
3. 476 views
The N-N bond energy is difficult to measure. Given the values of 190 kJ/mol for the N-Cl bond energy and 240 kJ/mol for the
1. 4 answers
2. asked by Anonymous
3. 460 views
a. At low temperatures, 1,1,2, trichloro ethane is not free to rotate about the carbon-carbon bond. It will be stuck in its
1. 5 answers
2. asked by Anonymous
3. 483 views
Will 1,1,2, trichloro ethane rotate polarized light if it is cooled to low temperature and trapped in its lowest energy
1. 6 answers
2. asked by Anonymous
3. 387 views
The graph below shows two conductivity curves with respect to temperature of a germanium semiconductor. In one case, there is
1. 5 answers
2. asked by Anonymous
3. 386 views
565 g block of aluminum metal is cooled from 243 c to 100 c is what?
1. 1 answer
2. asked by george
3. 343 views
The ionic compound sometimes called uranium yellow is used to produce colored glazes for ceramics. It is 7.252% sodium, 75.084%
1. 2 answers
2. asked by tash
3. 668 views
The molar mass of Fe(OH)3 is 106.87 g/mol. How many moles of H2SO4 are needed to react completely with 5.419 g of Fe(OH)3?
1. 1 answer
2. asked by steve
3. 620 views
What is the total pressure of the gas produced in the burette if it contains nitrogen gas whose pressure is 1.5 atm, oxygen gas
1. 2 answers
2. asked by lusiana
3. 618 views
1 When chemicals pour on the skin, the laboratory first aid is to ---------------.Apply 1% sodium carbonate Apply 1% boric acid
1. 7 answers
2. asked by mikel
3. 545 views
the ph of a 4.0 mol/L solution of hydrogen fluoric acid is 3.0 is this a concentrated or diluted explainI believe it is
1. 1 answer
2. asked by Anonymous
3. 436 views
Which one of the following compounds will NOT be soluble in water?A) NaOH B) Na2S C) K2SO4 D) LiNO3 E) PbO
1. 3 answers
2. asked by maria
3. 895 views
an object has a mass of 123 g and volume of 17cm3. calculate the density of the object
1. 3 answers
2. asked by angel
3. 484 views
I took 6.22 g of potassium hypochlorite and dissolved it up in a 100.0 mL flask.I then added 8.00 mL of 2.00 M nitric acid. The
1. 3 answers
2. asked by Storme
3. 496 views
Calculate the density of Argon (Ar) gas at 400.0K and 1.23 atm.
1. 4 answers
2. asked by someone help me please
3. 501 views
Oxygen gas can be generated by the decomposition of potassium chlorate according to the following equation:2 KClO3(s) --->2
1. 3 answers
2. asked by jaira
3. 605 views

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