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Chemistry
Page 18
Questions (96,840)
why would acetic acid concentration of a good vinegar need to be known for commercial reasons and regulatory health and safety
4 answers
asked by
andrea
1,041 views
When solutions of KCl and Pb(NO3)2 are mixed, a precipitate forms. Which of the following is the balanced equation for the
6 answers
asked by
Z
15,653 views
Use the reaction, which produces ammonia, to answer the question.
N2(g) + 3H2(g) ⇄ 2NH3(g) Which change would happen in the
16 answers
asked by
bill nye the science guy
5,435 views
The molar mass of the reagent, Fe(NH4)2(SO4)2.6H2O is 392.14 g/mol. Now suppose the measured mass of Fe(NH4)2(SO4)2.6H2O during
7 answers
asked by
Mara
5,995 views
The equation for a normal calibration curve for the detection of
iron(II) is determined experimentally to be 𝐴 = 12.93
4 answers
asked by
Rafaela
1,346 views
when ammonia is added to Zn(NO3)2 solution, a white precipitate forms, which dissolves on the addition of excess ammonia. But
5 answers
asked by
Ana
5,512 views
Two flasks A and B of equal capacity of volume contain SO3 and Co gas respectively under similar conditions of temperature and
7 answers
asked by
Mimi
6,165 views
What is the pH of a .0035 M Ba(OH)2 solution.
I did -log(.0070) to find pOH So 14-2.15=11.85 pH? Just want to double check.
4 answers
asked by
Sarah
1,784 views
Calculate the pH after 0.010 mol gaseous HCl is added to 250.0 mL of each of the following buffered solutions:
a. .050 M NH3/.15
4 answers
asked by
Joyy
3,469 views
if an excess of Al and 7.9 mol of Br2 are reacted in equation 2Al + 3Br2= 2AlBr2, how many moles of AlBr2 will be formed
5 answers
asked by
Tiffany
5,172 views
If 25cm^3 of NaOH solution containing 4.0g per litre of solution neutralised 50cm^3 of a monobasic acid,HX containing 1.8g of
4 answers
asked by
lucy
902 views
What is the equilibrium expression for the following acid dissociation reaction?
CH3COOH + H2O --><-- CH3COO- + H3O+ A.
5 answers
asked by
Anonymous
3,097 views
'Is the amphoteric substance C2O4H- more likely to act as an acid or a base, and why?'
I was given the Ka of C2O4H- as 6.4 x
4 answers
asked by
SarahF275
1,839 views
An unknown compound contains only carbon, hydrogen, and oxygen. Combustion analysis of the compound gives mass percents of
4 answers
asked by
James
3,208 views
For a certain reaction, ΔH° = –76.8 kJ and ΔS° = –225 J/K. If n = 3, calculate E° for the reaction at 25°C.
7 answers
asked by
Tayla
4,295 views
A buffer solution contains 0.052 M HC2H3O2 and 0.025 M NaC2H3O2. The pH of this solution is _____. Ka for HC2H3O2 is 1.8x10-5.
4 answers
asked by
Morgan
3,702 views
Oxygen can be produced in the laboratory by the reaction
2 KClO3(s) → 2 KCl(s) + 3 O2(g) . How much potassium chlorate is
5 answers
asked by
Caitlin
1,954 views
how many unpaired electrons are in this configuration 1s2 2s2 2p6 3s2 3p3
5 answers
asked by
Emmanuel
2,440 views
A 11.0g sample of a compound containing only oxygen and carbon produce 3.0g carbon and 8.0g oxygen. Determine the empirical
6 answers
asked by
Sherry
1,426 views
Propionic acid has a ka of 1.3x10^(-5), 50.0ml of a buffer solution having a pH of 4.65 is to be prepared using a 0.20 M
4 answers
asked by
Aria
1,040 views
The formaldehyde content of a pesticide preparation was determined by weighing 0.3124g of the liquid sample into a flask
5 answers
asked by
Ellen
3,336 views
The hydroxide of metal y reacts with hydrochloric acid as follow
Y(OH)2+2HCL product YCl2+2H20 It was found that 5.8g of Y(0H)2
6 answers
asked by
Prisca
683 views
A hydrocarbon Y on combustion gives 0.352g of carbon(iv)oxide and 0.18g of water. Calculate the empirical formula of the
5 answers
asked by
The orange baboon
2,120 views
Write an equation for the half-reaction in which a potassium atom, K, is oxidized.
A) K + e- ----> K+ B) K ----> K+ + e- C) K-
6 answers
asked by
M, S, E
2,761 views
Hydrogen sulfide H2S is produced during decomposition of organic matter. when .5000 mol H2S burns to produce SO2 and H2O. -281.0
5 answers
asked by
Lauren
1,761 views
1.) Hydrogen fluoride (HF) is a weak acid, which when dissolved in water reacts slightly by the equation: HF(g) + H2O(l) =
4 answers
asked by
Amy
1,644 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
564 views
For the following reaction at 600. K, the equilibrium constant, Kp, is 11.5.
PCl5(g) equilibrium reaction arrow PCl3(g) + Cl2(g)
6 answers
asked by
Anonymous
1,669 views
I would like to check my answer to the following question:
The permanganate ion oxidizes bromide in acidic conditions to form
11 answers
asked by
Kelsy
1,858 views
what is the molality of a solution prepared by dissolving 13.0 g of Ba(NO3)2 in 450 g of water?
5 answers
asked by
Mad
1,336 views
calculate the amount of 95% marble required to obtain 11.2Litres OF CARBON DIOXIDE
4 answers
asked by
sum
3,399 views
What is the volume of nitrogen that will be produced at stp from the decomposition of 9.60g of ammonium dioxonitrate(III)?
5 answers
asked by
The orange baboon
1,010 views
Molarity of NaNo by diluting 250.0 of a 1.60 solution to a final volume of 400cm3
4 answers
asked by
Anonymous
679 views
Consider a fuel cell that uses the reaction of ethanol with oxygen to produce electricity,
CH3CH20H(l)+ 3O2(g)---> 2CO2(g)+3H2O
5 answers
asked by
Sophie
8,281 views
Hi, could someone please take a look at the following question?
Use the data given below to construct a Born-Haber cycle to
4 answers
asked by
Constantine
7,812 views
Concentrated aqueous ammonia contains 1.00 mol NH3 dissolved in 2.44 mol H20. What is the mole fraction of NH3 in concentrated
5 answers
asked by
Lauren
2,495 views
The diagram below represents a phase change.
Which of the following best describes what is happening in the diagram? A. A liquid
3 answers
asked by
Chris
1,572 views
Calculate the volume of hydrogen produced at s.t.p when 25g of zinc are added to excess dilute hydrochloric at 3degree and
7 answers
asked by
Jubilee
3,223 views
Carbon dioxide is usually formed when gasoline is burned. If 30.0 L of Co2 is produced at a temperature of 1.00 X 103 C and
7 answers
asked by
Sylvia
3,510 views
The accepted value for the universal gas constant is 0.0821 L atm/mol K. Wat would it be if the pressure was measured in torr
5 answers
asked by
shawn
1,306 views
if 100cm3 of O2 diffused in 4 seconds and 50cm3 of gas Y diffuse in 3 seconds, calculate the relative molecular mass of gas Y?
5 answers
asked by
Bobrisky
3,415 views
A 25.00 mL sample of 0.4 M dimethylamine (CH3)2NH is titrated with 0.150 M HCl.
What is the pH at the half-equivalence point? Not
4 answers
asked by
1/2 equivalence point
3,264 views
consider the reaction in which 410 grams of Ca(NO3)2 react with just the right amount of lithium metal in a single replacement
4 answers
asked by
need help
2,497 views
Sodium propionate, NaC3H7O2, is used as a food preservative. What is the Kb of C3H7O2- given Ka HC3H7O2 = 3.4x10-5.
4 answers
asked by
Leaf02
455 views
How many grams of sucrose will be necessary to prepare 300 ml of a 5% solution of sucrose (342.0 g/mol)
4 answers
asked by
Adam
2,669 views
When pure sulfuric acid is dissolved in water,heat is evolved.To a calorimeter containing 300g of water at 20degree C,10.65g of
4 answers
asked by
Meenaakshi
1,773 views
An unknown molybdate (MoO4^-2) solution (50.00ml) was passed through a column containing Zn(s) to convert molybdate into Mo^3+.
4 answers
asked by
Ken
1,224 views
Vapour pressure of benzene and toluene are 0.9bar and 0.85bar. 7.8g of benzene is added to 180g of toluene. To find the vapour
4 answers
asked by
Isha
3,677 views
If 4.39 g AlCl3 is dissolved in enough water to make exactly 100.0ml of a solution, what is the molar concentration of the
4 answers
asked by
Karen
3,998 views
Use the data in the table to determine how long it will take for half of the original amount of SO2Cl2 to decompose at the
4 answers
asked by
Chloe
1,266 views
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