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Chemistry
Page 9
Questions (98,735)
Calculate the current that must be passed into a solution of aluminum salt for 1 hours 30 minutes, in order to deposit 1.5g of
5 answers
asked by
Olajide ifeoluwa
879 views
Consider a weak acid HX. If a 0.10 M solution of HX has a pH of 5.87 at 25°C, what is ΔG° for the acid's dissociation
5 answers
asked by
Sarah
2,428 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
1,799 views
How many atoms of each type are represented in each of the following? f. 5Fe(No3)2 g. 4Mg3(PO4)2 h. 2(NH4)2SO4
4 answers
asked by
victoria
3,392 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
1,963 views
What mass of an NO2 is formed when and NO reacts with 384 g of O2?
5 answers
asked by
MsHemmoPenguin
4,134 views
Describe suitable laboratory procedure for obtaining pure water from the titration mixture H2So4+NaoH
4 answers
asked by
Anonymous
1,184 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
146 views
Zinc + hydrochloric acid yields zinc chloride and hydrogen gas. (Zinc has a +2 charge).
Label what type of reaction (synthesis,
4 answers
asked by
Someone
209 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
4,016 views
How much quantity of sodium chloride is needed to make 30 ml of a 2% isotonic drug (sodium chloride equivalent 0.20) solution?
A.
5 answers
asked by
Abhishek chouhan
1,803 views
a 6.0 L vessel contained 0.0222 mol of phosphorus trichloride, 0.0189 mol phosphorus pentachloride and 0.1044 mol of chlorine at
4 answers
asked by
Bristol
1,884 views
What mass of O2 would be needed to burn 11g of the propane gas?
7 answers
asked by
Gabriel A.
3,282 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
5,819 views
"Identify the solid remaining when each of the following is heated (a) Lithium trioxonitrate (v). (b) Potassium trioxonitrate
3 answers
asked by
Solomon Boti
1,127 views
H2O2→ O2 + 2H+ + 2e- OCl- + 2H+ + 2e-→ H2O+ Cl- H2O2(aq) + OCl-(aq) → H2O(l) + Cl- (aq) + O2(g)Assign oxidation numbers to
4 answers
asked by
B
5,277 views
9.0g of hydrated salted CuSO4 x H2O was dissolved in 500cm3 of water and it's concentration in moldm3 was experimentally found
4 answers
asked by
Francisca
385 views
Calculate the standard cell emf for galvanic
cells with the cell reaction 2 H2(g) + O2(g) → 2 H2O(ℓ) in acidic solution.
4 answers
asked by
tyler
612 views
50.0 mL of an HCl solution with a pH of 3.5
neutralizes 200.0 mL of a Ca(OH)2 solution. What is the molarity of the Ca(OH)2 solu-
4 answers
asked by
Anonymous
1,706 views
water was added to 120.0g of a salt MCl2, to produce 60.0cm^3 of a saturated solution at 25celsius. its solubility at 25 celsius
4 answers
asked by
victor
609 views
if 3 mole of of calcium react with 3 mole of oxygen then what
substance is limiting reactant?
5 answers
asked by
Tsion
2,664 views
Wine is approximately 12% ethanol (CH3CH2OH) by volume. Ethanol has a molar mass of
46.06 g/mol and a density 0.789 g/mL. How
6 answers
asked by
Seid
5,543 views
For the following reaction, Kp = 3.5 104 at 1495 K.
H2(g) + Br2(g) 2 HBr(g) What is the value of Kp for the following reactions
5 answers
asked by
Elizabeth
11,014 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
5,615 views
Calculate the percentage by mass of silicon tetrachloride.
5 answers
asked by
Dominion favour
1,156 views
In a chemical reaction, substance A combines with substance B to form subtance Y. At the start of the reaction, the quantity of
6 answers
asked by
Katrina
5,022 views
The concentration of a benzene solution prepared by mixing 12.0 g C6H6 with 38.0 g CCl4 is__________ molal.
6 answers
asked by
jessie
10,146 views
In the reaction 2H2S + 3O2 -> 2SO2 +2H2O, the oxidizing agent is
1.oxygen 2.water 3.sulfur dioxide 4.hydrogen sulfide oxygen?
7 answers
asked by
Alexis
9,215 views
can anyone explain how does the balanced chemical equation show the law of conservation of mass?
20 answers
asked by
John
4,118 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
8,320 views
Calculate the total number of atoms in 0.00102 mol CH3(CH2)4CH2OH
The answer in the back of my book says 1.29 x 10^22 but i do
5 answers
asked by
Bob
4,943 views
A metal x with relative atomic mass 56 forms an oxide with formula x2O3 . How many grams of metal will combine with 10g of
28 answers
asked by
Harriet
2,796 views
An excess of a divalent metal M was dissolved in a limited volume of hydrochloric acid. If 576cm^3 of hydrogen were liberated at
7 answers
asked by
Adebayo
1,902 views
For the following fusion reaction, Calculate change in energy per mole.( Answer in J/mole)
2H1 + 2H1 ---> 3H1 + 1H1 (the mass
5 answers
asked by
Mima
8,950 views
A direct-current power supply of low voltage (less than 10 volts) has lost the markings that indicate which
output terminal is
5 answers
asked by
Confused
3,850 views
A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed
5 answers
asked by
cam
3,663 views
How do I prepare 100mL of 10g/L HCl from concentrated HCl(37%HCl, density 1.19g/mL)
Is it 2.28mL of conc HCl dilute to 100mL with
6 answers
asked by
annie
16,373 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
4,460 views
Balance the following equation for a half reaction that occurs in basic solution. Use e– as the symbol for an electron.
SO3^2-
9 answers
asked by
BOB
10,268 views
Reaction Rates Portfolio Chemistry B Reaction Rates there are no instructions on how to do this, the teacher won't explain it
7 answers
asked by
Anonymous
1,544 views
2. What is the reduction half-reaction for the following unbalanced redox equation?
Cr2O72– + NH4+ Cr2O3 + N2 A.) Cr2O3 ->
5 answers
asked by
jack
5,882 views
how many ions are present in 0.5 mol of sodium oxide?
thanks
6 answers
asked by
freddyyyyy!
2,847 views
what volume of hydrogen will be produced if 100cm3 of ammonia is completely decomposed at constant temperature and pressure.
7 answers
asked by
ch
2,547 views
iron metal & oxygen combine to form magnetic oxide of iron, Fe3O4. How many mols of iron can be converted to magnetic by 8.80
5 answers
asked by
Cassie
4,644 views
Calculate [OH-] and pH for the following strong base solution: 10.0 mL of 0.0105 M Ca(OH)2 diluted to 500.0 mL
5 answers
asked by
Kendall
3,089 views
Using basic conditions, MnO4- can be used as titrant for the analysis of Mn2+, with both the analyte and the titrant ending up
4 answers
asked by
help me
1,040 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
1,677 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
4,734 views
Consider the reaction
2Al + 3CuSO4 = Al2(SO4)3 + 3Cu What is the maximum amount of Cu (63.5 g/mol) that could be produced by
4 answers
asked by
Annalie
4,741 views
Camphor (C10H16O) has a heat of combustion of 5903.6 kJ/mol. When a sample of camphor with a mass of 0.124 g is burned in a bomb
5 answers
asked by
Nisah
3,101 views
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