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Chemistry
Page 29
Questions (96,910)
What are the functions of potassium hydroxide and tetraoxosulphate 6 acid and heated iron filing in the preparation of nitrogen
4 answers
asked by
Abigail Ibrahim
1,045 views
The hydrogen gas collected also contains some water vapor. The pressure of this mixture of gases equals the room pressure. find
3 answers
asked by
Anonymous
1,070 views
the max # of grams of K that can be obtained from 100.grams of KHCO3?
3 answers
asked by
mary
1,000 views
Assume equal concentrations, rank these solutions by pH HBrO, Ca(OH)2, HCl, KOH, NH3
Here's how I ranked it: highest: Ca(OH)2 >
4 answers
asked by
Katherine
3,900 views
What happens at the molecular level once equilibrium is reached, that is once the solution is saturated with Cu(IO3)_2?
3 answers
asked by
Michael
979 views
A galvanic cell has an iron electrode in contact with 0.20 M FeSO4 and a copper electrode in contact with a CuSO4 solution. If
3 answers
asked by
jeff
2,551 views
a 5.0 dm3 sample of oxygen at a pressure of 200 kPa and 2.0 dm3 sample of nitrogen at a pressure of 500 kPa are introduced into
3 answers
asked by
sandra
1,784 views
A 0.040M solution of a weak acid has a pH of 3.02 at 25°C . What is the value of Ka for the acid?
3 answers
asked by
darren
777 views
Chemical Reactions Quick Check
5 of 55 of 5 Items Question Photosynthesis requires which kind of energy?(1 point) Responses
2 answers
asked anonymously
125 views
Synthesis gas consists of equal volumes of:
a. \\(NO^{2}\\) and \\(H_{2}O\\) b. CO and \\(H_{2}O\\) c. \\(N_{2}O \\)and CO d.
3 answers
asked by
Abubakar Osemu Abdulrahman
96 views
10.0^cm3 of propane was sparked with 60 of oxygen at s.t.p.what is the volume of residu gas after the reaction is cooled
4 answers
asked by
Opeyemi
338 views
What are the (a) H+ ion concentration, (b) pH, (c) OH" ion
concentration, and (d) pOH of a 0.001 M solution of HC1?
2 answers
asked by
Ali Alkhfajy
692 views
At 760◦C, Kc= 33.3 for the reaction PCl5(g)⇀↽PCl3(g) + Cl2(g) If a mixture that consists of 0.31 mol PCl3 and 0.22 mol Cl2
3 answers
asked by
Melody
1,226 views
Calculate the molar solubility of calcium phosphate [Ca3(PO4)2 in a solution which is 0.10M in sodium phosphate (Na3PO4). Ksp
3 answers
asked by
Peopsh8
2,292 views
According to Avogadro's Law, when the number of moles doubles, the volume
a. is squared. b. quadruples. c. also doubles. d. is
3 answers
asked by
Kaashif
707 views
What is the difference between reaction quotient Q and equilibrium constant? According to books both are different but I just
5 answers
asked by
kajal
862 views
At a certain temperature 0.1moles of hydrogen gas and 0.1 moles of iodine gas were placed in 1 litre flask. It was found that
3 answers
asked by
Ashley
638 views
Ytterbium, atomic number 70, is the first element in the Periodic table to have the first four shells full.
a) State the number
3 answers
asked by
0oooooooo0
1,125 views
What is the oxidation number for each atom in NH4F?
N=+3, H=-4, F=+1 N=-3, H=+1, F=-1*** N=+3, H+1, F=-1 N=-3, H=-1, F=+1
3 answers
asked by
Holly
2,092 views
PCl5 is introduced into an evacuated chamber and comes to equilibrium (see Problem 16.37), at 250◦C and 2.00 atm. The
5 answers
asked by
Joe johnson
994 views
Arrange the acids
I) hydrogen selenate ion (HSeO− 4 ), pKa = 1.92; II) phosphoric acid (H3PO4), pKa = 2.12; III) selenous acid
3 answers
asked by
Anonymous
888 views
Determine the hydroxide ion concentration in a solution that is 0.0004 M HCl.
Answer in units of M. I have no idea how to start,
3 answers
asked by
will
1,429 views
At 500 ºC, the decomposition of water into hydrogen and oxygen,
2H2O(g) 2H2(g) + O2(g) has Kc = 6.0 × 10-28. What are the
3 answers
asked by
Anonymous
916 views
Which of the following is a molecular compound that contains five atoms per molecule?
germanium tetrabromide dinitrogen monoxide
3 answers
asked by
Dee Dee
3,185 views
472 mL of H2 gas was collected over water when 1.256 g of Zn reacted with excess HCl. The atmospheric pressure during the
4 answers
asked by
Jeremiah
1,459 views
The Kc for the following reaction at 940oC is 1.38.
Given the concentrations [CO2] = 0.500 M, [H2] = 0.425 M, [CO] = 0.610 M and
4 answers
asked by
Katie
1,740 views
The concentration of calcium ions in hard water can be determined by titration with reagent X,which forms a complex with
3 answers
asked by
Anonymous
671 views
3 I- (aq) +H3AsO4 (aq) + 2 H+ = I3- (aq) + H3AsO3 (aq) + H2O (l) is found to be first order with respect to each of the
4 answers
asked by
Sally
3,985 views
A .35M solution of a newly synthesized acid, HX, has [H+] of 4.1 x 10^-2. What is the value of Ka for this acid?
3 answers
asked by
Diana
1,017 views
A 500 ml buffer solution contains .2M Acetic acid and .3M sodium acetate. Find the pH of the buffer solution after adding 20 ml
3 answers
asked by
jess
1,294 views
Chemical reactions quick check
4 answers
asked anonymously
248 views
Which statement best describes what happens when oil and water are stirred together?(1 point)
Responses Water molecules will
2 answers
asked anonymously
76 views
Reaction: Vinegar and Baking Soda.
Properties of the Original Substances: A clear liquid (Vinegar) and a white powder (Baking
4 answers
asked by
j
80 views
Calculate the mass of Li formed by electrolysis of molten LiCl by a current of 7.5X10^4 A flowing for a period of 24 hours.
5 answers
asked by
Nikolai
2,703 views
(a) Propylene, H2C=CH-CH3, can be reacted to form a polymer known as polypropylene (PP). What type of polymerization reaction is
5 answers
asked by
Chemgam
1,360 views
a) Calculate the change in pH when 4.00 mL of 0.100 M HCl(aq) is added to 100.0 mL of a buffer solution that is 0.100 M in
6 answers
asked by
Jematormal91
6,024 views
calculate the theoretical number of moles of HCl equivalent to 1 mole of
a) NaHCO3 b)CaCO3 c)Al2O3
6 answers
asked by
prince
1,358 views
A tank of oxygen is under a pressure of about 4.00 x 10^3 kPa. Express this pressure in millimeters of mercury.
4 answers
asked by
Kim
1,064 views
Will AgCl precipitate out when equal amounts of 4.0 × 10-5M AgNO3 and 1.0 × 10-5M NaCl are mixed? (Ksp for AgCl = 1.8 ×
4 answers
asked by
jordan
485 views
Q: How is boiling different from sublimation?
3 answers
asked by
Vince
521 views
A solution contains, in each 5 mL, 0.5 g of potassium acetate (C2H3KO2, MW = 98), 0.5 g of potassium bicarbonate (KHCO3, Z =
2 answers
asked anonymously
109 views
Calculate the heat of formation of propane if the heat of combustion is -2220kj/mol.The heat of formation of carbon (IV) Oxide
1 answer
asked by
Peter Omato
124 views
Constant-volume calorimeters are sometimes calibrated by running a combustion reaction of known ΔE and measuring the change in
4 answers
asked by
Kales
2,530 views
If 10mL of 1 M HCl is added to 1L of 0.01 M phosphate buffer, pH 7.2, what is the resulting pH?
Also what are the conc of
2 answers
asked by
Liam
1,091 views
Determine the concentration of iron in an aqueous solution containing 0.2810 grams of Fe(NH4)2(SO4)2 per liter of solution.
4 answers
asked by
jenine
602 views
1) Copy and complete:
Two particles can react together only if they …… and the …… has enough …… to be ……. 2) What
5 answers
asked by
fiyin
1,345 views
Lovastatin (C24H36O5) has a molar mass of 404.53 g/m. The normal dose of the drug lovastain is 20mg. How many molecules of
2 answers
asked by
Michelle
828 views
Urea: (NH2)2CO
1. Which bonds in the molecule are polar and which are nonpolar? 2. What is the most polar bond in the molecule?
4 answers
asked by
Jashmid
3,603 views
Consider the chemical reaction: H2SO4(aq) +2 NaOH(aq) → 2 H2O(l) + Na2SO4(aq)
If the sulphuric acid is reacting at a rate of
6 answers
asked anonymously
49 views
Carbon dioxide gas and liquid water form solid glucose (C6H12O6) and oxygen gas during photosynthesis. Chlorophyll absorbs light
3 answers
asked by
Ceamus Angelina
3,328 views
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