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Chemistry
Page 16
Questions (96,660)
If 50.0 g of silicon dioxide is heated with an excess of carbon, 27.9g of silicon carbide is produced.
SiO2(s) + 3C(s) --> SiC(s)
5 answers
asked by
Kim
8,603 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
4,990 views
1. In the reaction 2Ca(s) + O2(g) → 2CaO(s), which species is oxidized?
7 answers
asked by
anna
23,256 views
72.1 g of steam is reacted with excess ethene (C2H4) according to the following reaction. Determine the maximum mass (in grams)
6 answers
asked by
naj
1,665 views
For the following reaction
KClO2->KCl+O2 assign oxidation states to each element on each side of the equation. Reactants K=? Cl=?
5 answers
asked by
chris12
27,884 views
can anyone explain how does the balanced chemical equation show the law of conservation of mass?
20 answers
asked by
John
4,075 views
What is the colour of:
1. Cu+ 2. Cu2+ 3. Cu3+?
5 answers
asked by
Alan
7,502 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
4,898 views
A 0.5224g sample of an unknown monoprotic acid was titrated with 0.0998M of NaOH. The equivalence point of the titration occurs
5 answers
asked by
Confused
3,118 views
Hydrogen peroxide can act as either an oxidizing agent or a reducing agent, depending on the species present in solution. Write
13 answers
asked by
Alexis
10,043 views
A 10.000 g sample of water contains 11.19% H by mass. What would by the %H in a 20.000 g sample of water?
I got 22.38%, would
7 answers
asked by
Anonymous
3,607 views
Which two solutions, when mixed together, will undergo a double replacement reaction and form a white, solid substance?
1.
7 answers
asked by
TJ
11,231 views
Calculate solubility of AgCl (in g/L) in a 6.5*10^-3 M silver Nitrate solution ksp= 1.8 * 10^-10
(AgCl molecular mass is 143.3g)
4 answers
asked by
Steve
4,268 views
Given these standard reduction potentials at 25oC:
Cr3+ + e- -> Cr2+ (E1^o = -0.407V) Cr2+ + 2e- -> Cr(s) (E2^o = -0.913V)
6 answers
asked by
Bobz
10,374 views
8.What is the mass of 4.56 moles of sulfur dioxide?
9.What is the mass of 4.56 molecules of sulfur dioxide? 10.How many formula
4 answers
asked by
grace
3,851 views
A student prepares a 0.28 M solution of acetic acid. If the Ka of the acid is 1.76 x 10^-5, then what is the pH of the solution?
4 answers
asked by
HQade
2,347 views
Plese tell me if these are right.
A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to
5 answers
asked by
Jason
13,634 views
What is the net ionic equation for the neutralization of CHOOH with NaOH?
4 answers
asked by
Jessica
3,398 views
You need to make a solution containing 150 g of potassium chloride in 300 g of water. What temperature is required?
5 answers
asked by
Anonymous
3,087 views
When 84.8 g of iron(III) oxide reacts with an excess of carbon monoxide, iron is produced.
Fe2O3(s) + 3CO(g) ==> 2Fe(s) + 3CO2(g)
7 answers
asked by
Kim
8,477 views
What is [Al(H2 O)5(OH)2+] in a 0.15-M solution of Al(NO3)3 that contains enough of the strong acid HNO3 to bring [H3O+] to 0.10
4 answers
asked by
Grant
2,989 views
The reaction CHCL3(g)+CL2(g)_CCL4(g)+HCL(g) has the following rate law:Rate =k [CHCL3][CL2].If the concentration of CHCL3 is
4 answers
asked by
Felix
7,398 views
Why do magnesium, phosphorus, and zinc exhibit slightly higher first ionization energies than the general trend within each of
5 answers
asked by
David
3,885 views
Sulfur trioxide dissolves in water, producing H2SO4. How much sulfuric acid can be produced from 12.1 mL of water (d=1.00g/mL)
5 answers
asked by
Jon
4,771 views
A 0.500 g sample of TNT (C7H5N2O6) is burned in a bomb calorimeter containing 610 grams of water at an initial
temperature of
5 answers
asked by
Anonymous
3,624 views
Consider 15 mL of an aqueous solution containing 2.0 g of an organic solute. If the distribution coefficient for the solute
5 answers
asked by
Anonymous
3,945 views
In a reaction 2 moles of CH4 were reacted with an excess of Cl2. As a result 117gram of CCl4 is obtained. What is theoratical
7 answers
asked by
Usman Bilal
1,833 views
Which of the following will be more soluble in an acidic solution than in pure water?
Be(OH)2 Ag2SO4 RbClO4 CuCN Cul
4 answers
asked by
Anon
4,001 views
How many formula units would there be in a 54.3 gram sample of sodium nitrate
7 answers
asked by
gbolahan
2,452 views
Consider the equilibrium: H2O(l) + HC2H3O2 ⇌ H3O+ + C2H3O2-
( All species are aqueous) Why will the addition of NaOH to a
4 answers
asked by
Ceamus Angelina
3,139 views
1.33dm³ of water at 70°c are saturated by 2.25moles of Pb(NO3)2, and 1.33dm³ of water at 18°c are saturated by 0.53mole of
17 answers
asked by
Kashim
4,385 views
A 25.0-mL sample of H2SO4 is neutralized with NaOH. What is the concentration of the H2SO4
if 35.0 mL of 0.150 M NaOH are
6 answers
asked by
tiya
5,791 views
Explain the observed temperature change upon mixing ethanol and cyclohexane.
7 answers
asked by
agu
1,603 views
CuCO3=CuO +CO2.
Find the mass of 1mole of each substance taking part in the reaction. (Ar:Cu=64,C=12,O=16). When 31g of CuCO3 is
6 answers
asked by
Busola
5,232 views
1,Given That Ea For The Hydrolysis Of Sucrose Is 108x10^3 KJ/mol,compare The Rate Constant Of Ths Reaction at 37degree C,(T1)
5 answers
asked by
Samrawit Mefikere
1,463 views
carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constanst (K) for this reaction
13 answers
asked by
Mima
8,512 views
Calculate the pOH of a 0.410 M Ba(OH) solution.
5 answers
asked by
Anonymous
4,655 views
ia 3ag2S+2AL = 6 ag +al2s3 a double replacement or single replacement
5 answers
asked by
Patricia
3,277 views
When 34.8grams of potassium sulphate was dissolved in 500cm cubed distilled water.calculate :the concentration of potassium
5 answers
asked by
lucy
1,546 views
in an experiment, ammonia gas, NH3(g) was bubbled through distilled water. Some of the dissolved ammonia gas, NH3, reacted with
4 answers
asked by
Joe
4,195 views
1. Hydrogen bromide(HBr) is a strong, highly corrosive acid and what is the pOH of a 0.0375M HBr solution?
a)12.57 b)12.27 c)1.73
6 answers
asked by
anonymous
3,340 views
What mass of glycerin (), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of
4 answers
asked by
Amber
2,587 views
12. In a calorimeter, 10 g of ice absorbs heat with an enthalpy of fusion of 334 J/g. What is the heat absorbed?
q = mCHf I am
5 answers
asked by
JoJo
4,464 views
A sample of ethanol, C2H5OH, weighing 2.84 g was burned in an excess of oxygen in a bomb calorimeter. The temperature of the
4 answers
asked by
Lance
4,419 views
How many moles of NaCl are in 16.0 grams of NaCl?
5 answers
asked by
kourtney
2,020 views
A certain reaction has a delta H= -75 kJ and an activation energy of 40 kJ. A catalyst is found that lowers the Activation
4 answers
asked by
josh
4,624 views
Determine the molarity of a 15.0 % by mass Hydrogen Peroxide solution. The density of Hydrogen Peroxide is 1.054 g/mL.
The 15.0%
5 answers
asked by
Jenna
3,523 views
Radon-222 undergoes alpha decay.what is the nuclear equation
5 answers
asked by
Shay
6,455 views
In a titration experiment, 20.4 mL of 0.883 M 𝐻𝐶𝑂𝑂𝐻 neutralize 19.3 mL of 𝐵𝑎(𝑂𝐻)2. What is the
5 answers
asked by
Shiro
2,846 views
How many grams of solid NaOH are required to prepare 500 ml of a 0.04 M solution? (b) Express the concentration of this solution
5 answers
asked by
Karar Samet
3,515 views
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