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Chemistry
Page 8
Questions (97,999)
A contains 1.60g of trioxonitrate(v) acid in 250cm³ of the solution.
B contains 9.0gdm3 of XHCO3, 25cm³ portions of B required
4 answers
asked by
Marvellous
489 views
1) Assume that the reference half-cell is changed to a standard mercury-mercury (II) half-cell.
a) What would be the reduction
4 answers
asked by
Alex
2,216 views
A sample of gaseous PCl5 was introduced into an evacuated flask so that the pressure of pure PCl5 would be 0.54 atm at 425 K.
4 answers
asked by
Margaret
4,084 views
laboratoories order hydrochloric acid as a concentrated solution (e.g. 36% W/V). what initial volume of concentrated laboratory
4 answers
asked by
TARA
1,087 views
what is the pH of a solution prepared by adding 0.259g of ammonium chloride to 115mL of water? Kb of NH3 is 1.8x10^-5
3 answers
asked by
Jill
1,489 views
What is the most common chemical method for removing H_30^+ ions in aqueous solution? Write a net ionic equation which describes
3 answers
asked by
J.M
2,441 views
a sample of hydrocarbon of mass 51.2g was analysed and found to contain 12.8 grams of hydrogen. If the formula of hydrocarbon is
3 answers
asked anonymously
105 views
How many milliliters of 50% w/v dextrose solution and how many milliliters of 5% w/v dextrose solution are required to prepare
1 answer
asked by
Riek
78 views
Indicate how many stereoisomers are possible for each compound.
b) tetrahedral [NiCl2Br2]2– c) octahedral [Fe(CO)4BrCl]
5 answers
asked by
Jematormal91
4,702 views
1) How do I prepare 2M nitric acid from 65% concentrated nitric acid?
2) How do I prepare 17% ammonia from 25% concentrated
7 answers
asked by
candy
9,245 views
A saturated solution of Na2SO4, with excess of the solid, is present at equilibrium with its vapor in a closed vessel. (a) How
7 answers
asked by
Jessica
8,305 views
2n2o5(g)→4no2(g)+o2(g) when 40g of n2o5 decompose 4.5g of o2 is formed what is the percent yield
7 answers
asked by
Anonymous
2,011 views
the volume of a sample of gas is 650.ml at STP. what volumes will the sample occupy at 0.0degrees celsius and 950.torr???
is it
5 answers
asked by
Andy
1,910 views
What is the purpose for a company to determine percent yield of a product and not just the theoretical yield?
The percent yield
5 answers
asked by
so....help_me
1,222 views
Question 1
A) Use the periodic table and example bond table to answer the question. Example Bond Energies of Ionic Compounds
10 answers
asked by
Student
1,792 views
Calculate the percentage of water in each of the following hydrates.
Aluminum bromide hexahydrate I just need help setting this
5 answers
asked by
Chopsticks
3,398 views
The Ksp values for three salts are given:
AgCl = 1.0e-10 Ag2CO3 = 6.3e-10 Ag3PO4 = 2.0e-21 Determine the order of solubility for
5 answers
asked by
Hannah
2,425 views
A 5.0 M solution of HNO3 is titrated with 0.3 M NaOH. Identify the species that have the highest concenttrations in the solution
6 answers
asked by
Sara
4,972 views
The durian is an Asian fruit that is known for its incredible stench. Food writer Richard Sterling describes its odor as
7 answers
asked by
Anonymous
2,099 views
Sufficient strong acid is added to a solution containing Na2HPO4 to neutralize one-half of it. what will be the pH of this
7 answers
asked by
ERAGON
7,302 views
Which pairs of liquids are likely to be miscible?
a. H2O and CH3OH b. H2O and C6H6 c. C6H14 and CCl4 d. CCl4 and CH4OH
6 answers
asked by
Kan
6,496 views
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
4 answers
asked by
susan
1,958 views
In order to analyze the waste water containing Co^2+ from a manufacturing process, 1.0L of water was evaporated to 10.0mL, then
5 answers
asked by
John
2,800 views
Why the petrol in open container dissapeared in terms of kinetic molecular theory of matter
Use the drawings to answer
2 answers
asked by
Montshisi
132 views
A solution is prepared by mixing 50.0 mL of 0.17 M Pb(NO3)2 with 50.0 mL of 1.6 M KCl. Calculate the concentrations of Pb2+ and
4 answers
asked by
Bill
3,046 views
Use Charles Law to solve for the missing value of each of the following a) 80.0 mL, T1= 27 degrees C, T2=77 degrees C. V2 =?
b)V1
7 answers
asked by
jerson
4,010 views
some reactions that are considered to be spontaneous at low temperatures will not proceed at a measurable rate or form any
4 answers
asked by
Anonymous
4,186 views
A molecule of ethanol has two carbon atoms, six hydrogen atoms, and one oxygen atom. A ball-and-stick model of ethanol is made
32 answers
asked by
Kono Dio Da
21,343 views
Which substance is an example of a nonpolar compound
sugar food coloring water vegetable oil
19 answers
asked by
super
9,354 views
Calculate the number of ions present in 7.45 grams of potassium oxide.
( At.mass of K= 39u).
6 answers
asked by
elby
7,488 views
Calculate the number of grams of dextrose in 250mL of D5W.
I know that the answer is 12.5g, but I do not understand the work.
5 answers
asked by
Elie
9,717 views
You burn 6 grams of carbon in plenty of air:
C ( s) + O2 ( g) = CO2 ( g) a What volume of gas will form (at rtp)? b What volume
10 answers
asked by
Maya
5,814 views
What is the mole to mole ratio of Fe2O3 to H2O?
Fe2O3 + 3H2 ---> 2Fe + 3H2O
4 answers
asked by
jenne
1,599 views
What is the freezing point depression of an aquous solution of 10.0 g of glucose in 50.0 g H2O?
7 answers
asked by
Gabrielle
3,515 views
what is the mole ratio of C5H12-> C5H8 + 2H2?
5 answers
asked by
dee
4,192 views
5 drops of 0.10M NaOH were added to 20mL of the buffer problem, the pHwent from 3.40 to 3.43. Write a net ionic equiation to
4 answers
asked by
Debbie
3,263 views
Which statement describes a chemical reaction at equilibrium?
A. The forward reaction happens slightly faster than the reverse
13 answers
asked by
emma
9,733 views
At 1100 K, Kp=0.25 for the following reaction. 2SO2(g) + O2(g) (reversible arrows) 2SO3(g) What is the value of K at this
5 answers
asked by
Taasha
8,776 views
Calculate the amount of work done for the conversion of 1.00 mole of Ni to Ni(CO)4 in the reaction below, at 75oC. Assume that
7 answers
asked by
Joshua Chang
5,605 views
From XNH3+YO2=ZNO+QH2O. find the value of Z?
10 answers
asked by
Chelly
3,400 views
2H2(g)+ O2(g) --> 2H2O(L)
I know the oxidizing agent is oxygen and the reducing agent is hydrogen. what are the number of
5 answers
asked by
tami
5,821 views
Consider the combustion of propane:
C3H8(g)+5O2(g) yields 3CO2(g) + 4H2O(l) delta H= -2221 kJ Assume that all of the heat comes
5 answers
asked by
Shellby
8,553 views
How many kilojoules of heat are required to melt a 10.0 g popsicle at 0 degress C? Assume the popsicle has the same molar mass
7 answers
asked by
Anonymous
8,307 views
Just a few questions about rates of reaction.
A) Why are the units for average and instantaneous rates the same? -because they
7 answers
asked by
Jamie
5,343 views
Two cells are connected in series . One contains AlCl3, and the other contains AgNO3 as the electrolytes. What mass of Ag is
5 answers
asked by
Masre
2,008 views
The pH of a 1.00 10-3 M solution of pyrrolidine is 10.82. Calculate Kb.
i keep getting anumber that is ^ (positive) and that's
4 answers
asked by
Jennifer
1,407 views
Calculate Ecell for reaction for the given info below..
O2(g)+2H2O(l)+4Ag(s)--> 4OH-(aq)+4Ag+(aq Ag+(aq)+ 1e ---> Ag(s) Ered=
4 answers
asked by
Hank
4,471 views
if the relative atomic mass of natural copper is 63.54,calculate the proportions of the isotope 65cu and 63cu
6 answers
asked by
etim sylvester
3,013 views
If K > 1 at 25°C and 1 atm of pressure, then which statement is true about the reaction's equilibrium?
a. There is always more
5 answers
asked by
Christine
2,589 views
Determine the concentration of CO32- ions in a 0.18 M H2CO3 solution. Carbonic acid is a diprotic acid whose Ka1 = 4.3 × 10-7
5 answers
asked by
Veronica
11,899 views
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