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Chemistry
Page 8
Questions (98,057)
A sample is to be analyzed for its chloride content by precipitating and weighing silver chloride. What weight (g) of sample
4 answers
asked by
Jinjin
1,295 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
1,861 views
Gas is confined in a tank at a pressure of 10.0 atm and a temperature of 15o
C. If half of the gas is withdrawn and the
5 answers
asked by
Angie
2,043 views
28g of NH3 is dissolved in 500mL of water. What is the concentration of the resulting solution?
(I do not understand how to solve
5 answers
asked by
Amir
893 views
2Cu+O²--->2CuO
Identify the reactans in the equation .write down their names
4 answers
asked by
Neo
1,226 views
calculate the mass, in grams, of NaCl present in each of the following solutions.
6.25 g of 11.5% NaCl solution 452 g of 12.3%
4 answers
asked by
pat
3,472 views
Describe how the following reagents would be used to prepare barium sulphate:solid sodium sulphate, distilled water,barium
4 answers
asked by
Eddy
537 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
1,491 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
2,443 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
106 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
79 views
Indicate how many stereoisomers are possible for each compound.
b) tetrahedral [NiCl2Br2]2– c) octahedral [Fe(CO)4BrCl]
5 answers
asked by
Jematormal91
4,703 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
8,306 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
2,012 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
1,911 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
The concentration of hydroxide ions in a solution of nitric acid 0.2 M is:
a. 2 x 10-14 M b. 5 x 10-14 M c. 5 x 10-7 M d. 2 x
5 answers
asked by
scilover
1,787 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
3,399 views
A 1.2M NaOCl solution is prepared by dissolving solid NaOCL in distilled water at 298K. The hydrolysis reaction
OCl-(aq) + H2O(l)
7 answers
asked by
Anonymous
2,173 views
Please! This is urgent!
I don't know how to do this. Determine the solubility at 25°C of Cd(IO3)2 in water and in 0.20 M CdCl2.
4 answers
asked by
Andrea
2,322 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
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
2,802 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
4,011 views
Calculate the number of ions present in 7.45 grams of potassium oxide.
( At.mass of K= 39u).
6 answers
asked by
elby
7,489 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
9,719 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
5,815 views
The number of moles of H2O produced in reaction of 50ml 1.0 M HCl and 50mL 1.0 M Naoh
6 answers
asked by
Amanda
9,729 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
3,518 views
what is the mole ratio of C5H12-> C5H8 + 2H2?
5 answers
asked by
dee
4,193 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
3,264 views
Which statement describes a chemical reaction at equilibrium?
A. The forward reaction happens slightly faster than the reverse
13 answers
asked by
emma
9,734 views
HA and HB are two strong monobasic acids.
25.0cm3 of 6.0moldm–3 HA is mixed with 45.0cm3 of 3.0moldm–3 HB. What is the H+(aq)
6 answers
asked by
Anna
8,125 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
8,777 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
The equilibrium constant (Keq) is the ratio of ____ concentrations to ____ concentrations at equilibrium, with each
5 answers
asked by
MEGAN!!!!!!!!!!!
2,992 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
5,822 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
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
5,344 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
4,472 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
3,014 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
2,590 views
Calculate the pH that results when the following solutions are mixed
1. 35 mL of 0.20 M formic acid 𝐻𝐶𝑂𝑂𝐻,
5 answers
asked by
I need your help thanks
5,017 views
The reaction between sodium hydroxide and hydrobromic acid is represented in the equation below:
OH- + H+ -> H2O A 62.5 mL sample
4 answers
asked by
lola
5,717 views
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