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Chemistry
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Questions (97,987)
In an experiment, a student mixes equal volumes of 0.0020M Pb 2+ ions with 0.0040M I- ions. The trial ion product is?
PbI2 <-> Pb
6 answers
asked by
sh
1,873 views
Using the information below, which answer lists the salts in order of increasing solubility?
PbSO4 Ksp = 1.6 x 10^-8 PbS Ksp = 8
4 answers
asked by
Christine
868 views
what concentration of nitrogen should be present in a glass of water at room temperature? assume a temperature of 29°C a total
3 answers
asked by
ashmit
2,008 views
what can we say about the solubility of chlorides of Mg, Ca, and Ba?
1 answer
asked anonymously
27 views
which of the following has the highest boiling point?
a)C2Cl6 b)C2Br6 c)C2H6 d)C2F6 e)C2I6 i know its e, but why is that the
6 answers
asked by
RiChy
12,339 views
A solution is prepared in which a trace or small amount of Fe+2 is added to a much larger amount of solution in which the [OH]-
6 answers
asked by
brian
3,231 views
A dilute electrolyte is not necessary weak and a concentrated electrolyte weak and a concentrated electrolyte is necessary
3 answers
asked by
Tatu
218 views
Nitrogen from animal waste can be stored in bodies of water as(1 point)
nitrites. nitrites. ammonia. ammonia. nitrates. nitrates.
10 answers
asked by
help pls
3,685 views
How much energy is released when 2.05 mol of water vapour at 100C condenses with no change in temperature?
5 answers
asked by
Anonymous
1,415 views
25g of NH3 is mixed with 4 moles of O2 in given reaction.
4NH3(g)+5O2(g)-->4NO(g)+6H2O(1) <--- what mass of NO is formed? What
7 answers
asked by
Erawd
6,621 views
An 8.00 mass % aqueous solution of ammonia has a density of 0.9651g/ml. Calculate the molality, molarity, and mole fraction of
5 answers
asked by
ALISON
7,784 views
Complete the table relating the values of Δ𝐺∘ and 𝐾 .
Δ𝐺∘ K <0 =0 >0 K can be =1, <1, or >1
4 answers
asked by
Anonymous
11,894 views
What is the only positive ion found in H2SO4(aq)?
a. ammonium ion b. hydronium ion c. hydroxide ion d. sulfate ion The answer's
5 answers
asked by
danny123
8,957 views
Consider the following equilibrium process at 700°C:
2H2 + S2 ↔ 2H2S Analysis shows that there are 2.50 moles of H2,
6 answers
asked by
Chris
11,493 views
what volume of 0.120 M NaOH must be added to 100 ml of 0.100 M NaHC2O4 to reach ph of 4.70?
H2C2O4 Ka1 = 5.9 x 10-2 HC2O4^- Ka2 =
5 answers
asked by
Steve
4,559 views
For the system
H2(g) + CO2(g) <---> H2O(g) + CO(g) at equilibrium, the addition of H2(g) would cause (according to
4 answers
asked by
please help
6,258 views
How many molecules of lithium carbonate are there in 8.62 g of the compound?
a) 74 molecules b) 647 molecules c) 0.12 molecules
4 answers
asked by
lil
1,362 views
Nucleophile or electrophile?
(1) CH3COOH (2) CH3COO- At first, I thought that they were both Nucleophiles, but now Ive confused
5 answers
asked by
Sarah
5,894 views
The Henry's law constant for CO2(g) in water at 25 °C is 29.4 bar·M–1. Estimate the concentration of dissolved CO2(g) in a
5 answers
asked by
Matt
8,503 views
Which type of intermolecular forces would be expected in a sample of F2 gas?
a. London forces, dipole interactions, and ionic
5 answers
asked by
Christine
4,349 views
copper compounds such as copper (II) sulfate are toxic. before disposal, these compounds must be treated to reduce their
6 answers
asked by
Josh
6,902 views
Hydrogen is generated by passing hot steam over iron, which oxidizes to form Fe3O4 in the following equation.
3Fe(s) + 4H2O(g) ->
5 answers
asked by
Vachirawit
2,425 views
A certain reaction has a delta H= -75 kJ and an activation energy of 40 kJ. A catalyst is found that lowers the Activation
4 answers
asked by
josh
4,673 views
10cm3 of propane was sparked with 60cm3 of oxygen at Stp.What is the volume of residual gases after the reaction is cooled.
5 answers
asked by
Zino
1,665 views
Mno4- + So3-2 = Mno2 + sO4-2 (OH-) solve this redox reaction and give me the method also
4 answers
asked by
kiara
16,593 views
Which of the following substances shown should the standard heat of formation (\DeltaΔHfo be zero at 25oC
GaPO4 (aq) As (l) Ar
4 answers
asked by
Sara
606 views
Name two metals which form both soluble trioxocarbonate (iv) and soluble tetraoxosulphate (vi)
4 answers
asked by
Nicola
898 views
Is carat earrings homogeneous mixture or heterogeneous mixture?
4 answers
asked by
Lwandile
906 views
how much copper sulphate will require saturating 80 grams of water at 20 degree celcious .if solubility of copper sulphate at
4 answers
asked by
diwas pathak
1,228 views
will MgCl2 reacts with NaCl to form precipitate
1 answer
asked anonymously
20 views
would you expect barium to react with HCl acid faster or slower than calcium
1 answer
asked anonymously
30 views
Which is true about distillation? (1 point)
It uses semipermeable membranes to filter out particles. It removes mainly large
1 answer
asked anonymously
74 views
"How many grams of NH3 can be produced from the reaction of 28 g of N2 and 25 g of H2?
N2 + 3H2 ---> 2NH3 ==> 28 g N2 x (1 mol
11 answers
asked by
Emily
27,744 views
Calculate the lattice energy of potassium oxide from the following data:
Enthalpy of sublimation of potassium: +89.24 kJ/mol Bond
5 answers
asked by
Joanie
13,502 views
a titration required 18.38mL of 0.1574 M NaOH solution. how many moles of NaOH were in this volume?
11 answers
asked by
Gurjot
6,966 views
a volume of 50 cm of oxygen was exploded in 50cm of carbon iv oxide. what was the volume of the residual gas at room
2 answers
asked anonymously
194 views
The molar mass of ammonium acetate is 77.083 g/mol. A student uses 0.100 mol of ammonium acetate in a chemical reaction.
How many
1 answer
asked by
bear
142 views
The Ksp of PbBr2 is 6.60× 10^–6.
What is the molar solubility of PbBr2 in pure water? What is the molar solubility of PbBr2 in
6 answers
asked by
Anon
37,248 views
What mass of sulfuric acid, H2SO4, is required to react with 1.27 g of potassium hydroxide, KOH? The products of this reaction
4 answers
asked by
Angel Wills
3,546 views
Calculate the number of moles of Na2CO3 present in 100cm^3 of 2 M Na2CO3 solution.i got 5 moles.am i right
7 answers
asked by
lucy
1,835 views
When 0.40 g of impure zinc reacted with an excess of hydrochloric acid, 127 mL of hydrogen was collected over water at 10
5 answers
asked by
Sandy
5,909 views
C7H6O3(s) + C4H6O3(l) → C9H8O4(s) + HC2H3O2(l)
is the equation. At 20 degree celsius, how many liters of acetic acid, HC2H3O2,
7 answers
asked by
Emat
3,678 views
In the gas-phase reaction given below, the [I2] changes from 0.400 M at 0.00 min to 0.200 M at 3.00 min. I2 + Cl2 --> 2 ICl
5 answers
asked by
Lionel
4,629 views
In a saturated solution of silver phosphate, the concentration of silver ion is 4.5 x 10^-4 mol/L. The Ksp of silver phosphate
6 answers
asked by
Bobby
4,453 views
How many grams of HCl must be used to produce 10.0L of chlorine gas at STP?
Reaction: 2HCl (g)--->H2 (g)+Cl2 (g)
7 answers
asked by
Cliff
6,393 views
The cell diagram for the lead-acid cell that is used in automobile and truck batteries is
Pb(s) l PbSO4 (s) l H2SO4 (aq) l
5 answers
asked by
Bridget
3,119 views
How many grams of Fe(NO3)2 are present in 555mL of a 0.650 M solution of Fe(NO3)2??
I have no clue what to do??
5 answers
asked by
Ocean
2,544 views
Determine the solubility of a sodium sulfate, Na2SO4, in grams per 100g of water, if 0.94 g of Na2SO4 is dissolved in 20 g of
5 answers
asked by
Alex
4,956 views
How to calculate the quantity of heat gained or lost in the following change:
3.50 mol of water freezes at 0 degrees C? Would it
5 answers
asked by
Anonymous
4,728 views
Why was a strong base (KOH) used in the synthesis of ferrocene? Why would a strong acid not be a suitable alternative?
5 answers
asked by
dana
2,190 views
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