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Chemistry
Page 10
Questions (98,741)
what is the oxidation number of Carbon in C6H12?
thank you!
4 answers
asked by
Jake
3,603 views
The standard enthalpy of combustion of C2H6O(l) is -1,367 kJ mol-1 at 298 K. What is the standard enthalpy of formation of
4 answers
asked by
abby
4,395 views
What is the enthalpy change when 4.608 g of ethanol, C2H5OH(ℓ), undergoes complete combustion?
C2H5OH(ℓ) + 3O2(g) --> 2CO2(g)
5 answers
asked by
anonymous
1,920 views
How can you balance Cu+HNo3=Cu+(No3)2+No+H2o by using algebric or a b c d method please show me with full workout
5 answers
asked by
Eldana
2,495 views
A sample of gas of mass 2.929 g occupies a volume of 426 mL at 0degree Cel and 1.00 atm pressure. What is the molecular weight
6 answers
asked by
Peter
2,301 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
5,542 views
50cm'3 of sulphur (iv) oxide were produced at s.t.p when some quantity of powdered sulphur were burnt in excess oxygen.state the
6 answers
asked by
Anonymous
1,980 views
calculate the number of atoms present in 3.4g of h2s?
7 answers
asked by
plzzz find
2,474 views
What is the final concentration (M) of a solution prepared by diluting 50.0 mL of a 6.00 M KCl solution to a volume of 0.500 L?
A
5 answers
asked by
Coug
9,009 views
A 2.9 L sample of gas has a pressure of 5 atm and a temperature of 50 °C. What will be the new temperature in Kelvin if the
6 answers
asked by
nene
3,408 views
Which statement accurately describes what happens in a reaction when reactants become products?(1 point)
Some reactants rearrange
7 answers
asked by
Jadyn
1,690 views
Rank thefollowing elements in order of decreasing atomic radius. N, B, Be, Li?
I thought it was N, B, Be, Li
4 answers
asked by
Anna
2,377 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
1,864 views
Br2(aq) + 2 KI(aq) ==> 2 KBr(aq) + I2(s)
What is oxidized and what is reduced in this reaction?
5 answers
asked by
Ben
4,405 views
A is a solution containing 5.00 g of HNO3 in 500 cm\(^3) of solution. B is a solution of NaOH of unknown concentration. 21.30cm3
5 answers
asked by
adeola babs
789 views
2 H2S (g) + SO2 (g) <===> ƒnƒn3 S (s) + 2 H2O (g)
1) At 298 K, the standard enthalpy change, H¢X, for the reaction represented
4 answers
asked by
JJ
2,769 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
702 views
A 32.0 mL sample of hydrogen is collected over water at 20.0 degrees celcius and 750.0 torr. What is the volume of the dry gas
7 answers
asked by
Tyran
5,510 views
A commercially available sample of sulphuric acid is 15% H2SO4 by mass (density=1.10g/ml) Calculate the molarity ,normality and
10 answers
asked by
riya
16,578 views
does anyone have the answers for Calculating mass quick check?
1. Which option correctly describes the reactants and products of
10 answers
asked by
Anonymous
6,420 views
If 15.0 g of KCl is added to 100.0 g of water at 30.0 °C, how much more must be added to saturate the solution?
5 answers
asked by
pinky
1,527 views
Calculate the mass of silver deposited when 0.2A of electricity is passed through a silver chloride solution for 2 hours, given
4 answers
asked by
SUMALIA
565 views
Not sure if i posted this but
Need help with my pH calculations? 0.10 mol of solid sodium hydrogen carbonate and 0.20 mol of
3 answers
asked by
dan
782 views
Calculate the molarity of a solution that contains 48g of NaCl in 250ml of solution.
4 answers
asked by
James
1,811 views
What is the pH of a solution containing 0.81M HA and 0.35M A- ? Ka HA=5.45x10-8.
4 answers
asked by
Leaf02
538 views
Describe how the following reagents would be used to prepare barium sulphate:solid sodium sulphate, distilled water,barium
4 answers
asked by
Eddy
540 views
Combustion analysis of 1.0g of a compound containing carbon , hydrogen and oxygen gives 2.3 g of carbon dioxide and 0.93g of
4 answers
asked by
hiedi
1,604 views
What is the molarity of a solution with 3.5mol of CaCl2 in 1.89L of solution
What is the molarity of a solution with 16g of CH3OH
4 answers
asked by
Ali
1,928 views
In the equilibrium system CH3COOH(aq) + H2O(l) —> — H3O+ CH3COO-(aq)
.<— Which species is present in the highest
5 answers
asked by
L
3,439 views
Using this redox equation:
Mn(OH)2(s) + MnO4-(aq) → MnO42-(aq) When the equation is balanced with smallest whole number
7 answers
asked by
Addam
5,812 views
A solution is prepared using 15.0 mL of 1.0 M HCl and 20.0 mL of 0.5 M HNO3. The final volume of the solution is 1.25 L. What
4 answers
asked by
Heather
1,122 views
Balance the following chemical equation using the oxidation number method:
K2Cr2O7 + SnCl2 + HCl → CrCl3 + SnCl4 + H2O + KCl
3 answers
asked by
Vanessa
1,530 views
Balance this chemical equation.
K4Fe(CN)6 + KMnO4 + H2SO4 ---> KHSO4 + Fe2(SO4)3 + MnSO4 + HNO3 + CO2 + H2O
4 answers
asked by
Peter
2,866 views
Two cells are connected in series. One contain AlCl3, and the other contains AgNO3 as the electrolytes .what mass of Ag is
3 answers
asked by
Yadaveli
659 views
A chemist makes a “stock” solution of KOH by dissolving 1050.0 grams in enough water to make 1.50 liters of solution. If
4 answers
asked by
Jim
1,214 views
How many grams of CuCl2 are required to make 75 ml of a 0.20M solution?
3 answers
asked by
ave
650 views
4. Calculate the mass of zinc carbonate that would remain if 17.0g of zinc carbonate was
reacted with 50cm3 of 4M nitric acid.
3 answers
asked by
Freddy
683 views
calculate the solubility of 10.1g of potassium trioxonitrate v dissolved in 50g of disstilled water at 25 degree celsius
4 answers
asked by
loveth
759 views
as we move down the group Mg, Ca, and Ba, what happen to the solubility of (a) sulfates, (b) hydroxides, (c) carbonates?
1 answer
asked anonymously
15 views
A 25.0ml sampla of H2SO4 is titrated with 30.0ml of 0.150m NaOH.calculate the concentration of the H2SO4.
2 answers
asked by
Leilanie
177 views
The relative molecular mass of calcium carbonate (CaCO3) is 100. What is the minimum volume of 2.0 M hydrochloric acid (HCl)
6 answers
asked by
scienceguy
4,093 views
If the cell emf of a Zn-Cu cell is 0.80 V
when the concentration of Zn2+ is 2.0M, what is the concentration of Cu2+?
5 answers
asked by
Emerson
3,012 views
11. How many moles of CO2 would be produced from 56 moles of O2 according to the following balanced equation?
2 C2H6 + 7 O2 --->
7 answers
asked by
Sarah
5,410 views
The heat of combustion of propane is -2,220.1 kJ/mol
calculate the heat of formation, delta Hf, of propane given that delta Hf of
4 answers
asked by
Anonymous
4,569 views
Science
CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model
20 answers
asked by
DrBob222
6,579 views
Separate this redox reaction into its component half-reactions.
O2+2Cu---->2CuO thought it was: Oxidation 2e-+O2---->2O(-2)
5 answers
asked by
Cari
8,724 views
How many grams of solute are contained in 64.3 mL of 0.0238M KOH?
Do I convert 64.3ml to L=.0643L Multiiply .0643L and .0238M
5 answers
asked by
Suzanne
3,683 views
24 g of carbon and 32 g of oxygen combine to form carbon monoxide. What is the mass of the carbon monoxide formed?
5 answers
asked by
Hii
1,023 views
The question is: Find the following quantities
the volume, in liters, of 835 g SO3 at STP My answer is: 1 mol of SO3=80g 835g/80g
6 answers
asked by
Mike
7,258 views
Would a precipitate form if 200 mL of 0.006 M AgNO3 were added to 700 mL of a 0.005 M solution of K2CO3?
4 answers
asked by
Student12
1,392 views
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