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Chemistry
Page 2
Questions (99,798)
The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+].
7 answers
asked by
Tori
5,896 views
How much energy is released when 2.05 mol of water vapour at 100C condenses with no change in temperature?
5 answers
asked by
Anonymous
1,475 views
A solution of H2SO4(aq) with a molal concentration of 8.01 m has a density of 1.354 g/mL. What is the molar concentration of
7 answers
asked by
Jhanvi
13,153 views
if the mole fractionof sulfuric acid (H2SO4) in an aqueous solitioin is 0.325, what is the percent by mass of H2SO4?
5 answers
asked by
Joy
5,702 views
What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 20.0 L of water to produce an antifreeze solution
4 answers
asked by
lily
1,416 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
2,444 views
For the following reaction, the partial pressures are listed in the table:
Substance Equlibrium H2S 5.4 I2 1.2 HI 0.43 S 7 If the
7 answers
asked by
jenny
2,639 views
Imagine a graph. The x-axis is labeled “time” and is measured in seconds, and the y axis is labeled “potential energy”
5 answers
asked by
Garlbread
1,402 views
A Ca(OH)2 solution has a pH of 8.0. Determine the values of [H3O+], [OH– ], and [Ca(OH)2] for the solution
4 answers
asked by
diana
3,968 views
Two cells are connected in series . One contains AlCl3, and the other contains AgNO3 as the electrolytes. What mass of Ag is
5 answers
asked by
Masre
2,051 views
For melting point determination, what is the optimum rate of heating near the melting point? What are the problems, if the rate
7 answers
asked by
Sunday
4,795 views
Use the table of molar masses to complete the activity.
Element Molar Mass(g/mol) Carbon 12.01 Hydrogen 1.01 Oxygen 16.00 A
5 answers
asked by
Aaliyah
2,937 views
1.00 L of a gas at standard temperature and pressure is compressed to 473 ML. what is the new pressure of the gas?
6 answers
asked by
Elizabeth
17,973 views
Which of the options explains low ionization energy?
a. When the valence electron is at the zeroth order b. When the valence
4 answers
asked by
Favour
452 views
Why must a hole be made in the aluminium lid
7 answers
asked by
Abbot
1,836 views
How many grams of Fe(NO3)2 are present in 555mL of a 0.650 M solution of Fe(NO3)2??
I have no clue what to do??
5 answers
asked by
Ocean
2,602 views
Explain the temperature change upon mixing ethanol and water.
4 answers
asked by
Elcy
352 views
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate
I know that the
5 answers
asked by
Nesta
3,567 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
8,364 views
A dilute electrolyte is not necessary weak and a concentrated electrolyte weak and a concentrated electrolyte is necessary
3 answers
asked by
Tatu
241 views
1.Suppose 10 atoms of carbon (C) react with 20 atoms of oxygen (O). According to the Law of Conservation of Matter, how many
76 answers
asked by
Anonymous
26,285 views
Write the balanced equation for vandadium (II) oxide with iron (III) oxide results in vanadium (V) oxide and iron (II) oxide.
2VO
5 answers
asked by
Hayden
5,809 views
Which type of intermolecular forces would be expected in a sample of F2 gas?
a. London forces, dipole interactions, and ionic
5 answers
asked by
Christine
4,387 views
Calculate the mass of sodium phosphate required to prepare 1.75 L of solution in which the sodium ion concentration is 0.25
5 answers
asked by
Zilly
3,269 views
Oxidation state of Group 4 (14) elements and their compounds.
a) Work out the oxidation state of carbon in these compounds:
17 answers
asked by
simon fredly
263 views
What type of reaction occurs between copper (II) oxide and carbon? Give a reason for your answer.
5 answers
asked by
Douglas
2,927 views
Tetraphosphorus trisulphide (P4S3) is used in the match heads of some matches. It is produced in the reaction 8P4+3S8 --> 8P4S3.
6 answers
asked by
Ana
9,779 views
How would you obtain a sample of a pure iodine from a mixture of iodine and lead (ii) sulphate.
5 answers
asked by
Lexus cotricks
3,136 views
What is the pH of a 0.25 M acetic acid solution if the Ka of acetic acid is 1.8 x 10-5?
2.67 0.60 5.34 11.33 I got A, 2.67. I
5 answers
asked by
Jason
3,339 views
Properties of chlorine, iodine and their compounds are compared.
Property Q for chlorine is smaller than for iodine. What is
5 answers
asked by
Marissa
1,740 views
How would I find the volume occupied by 3 moles of N2 at zero degrees and 101.325 kPa?
5 answers
asked by
anonymous
1,579 views
If the reaction between H2 and I2 to form HI were at equilibrium and an additional 0.25 moles of H2 were added to the reaction,
5 answers
asked by
HQade
2,333 views
What is the pH and pOH of a solution that was made by adding 400mL of water to 350mL of 5.0x10^-3 M NaOH solution?
4 answers
asked by
Jackie
4,133 views
Does anyone have the answers for Chemistry B Semester Exam? =)
14 answers
asked by
hello
3,461 views
A new wood stain loses 6.5% of its colour every year in a city that experiences a lot of hot, sunny days.
What percent of colour
5 answers
asked by
Anna
1,447 views
What is the molar concentration of K4Fe(CN)6 solution if 40 ml were used to titrate 150 mg of Zn ( that are dissolved ) forming
4 answers
asked by
Mary
1,314 views
A hydrate of zinc chlorate, Zn(ClO3)2 .xH2O(s) contains 21.5% zinc by mass. Find the value of x.
What I've done: Molar mass of
6 answers
asked by
Anonymous
8,998 views
A 3L sample of paint that has a density of 5 g/ml is found to contain 10% by mass Pb3N2(s). How many
grams of lead were in the
7 answers
asked by
सदानंद पांडेय
5,389 views
A student is all 32 gram of potassium nitrate in water to prepare 200 ml of solution what is the concentration of solution in
7 answers
asked by
PARNEET
3,222 views
A Balanced equation to represent the reaction between 1-pentanol and ethanoic acid. (Production of an ester)
5 answers
asked by
Shantel
10,912 views
The reaction of 2.5 mol of O2 with 4.6 mol of C3H8 will produce ________ mol of H2O.
4 answers
asked by
Anonymous
15,900 views
What mass of sulfuric acid, H2SO4, is required to react with 1.27 g of potassium hydroxide, KOH? The products of this reaction
4 answers
asked by
Angel Wills
3,585 views
Which equation shows conservation of mass and charge?
A.NH4Br → NH3 + Br2 B. 2Mg + Fe3+ → Mg2+ + 3Fe C. H2SO4 + LiOH →
6 answers
asked by
Angie
7,252 views
Consider the balanced chemical equation: 3Sr(OH)2(aq) + 2H3PO4(aq) → Sr3(PO4)2(s) + 6H2O(l). How many moles of Sr(OH)2 remain
7 answers
asked by
Mike
5,192 views
what is the name for the following coordination compounds or ions?
1. [Al(H2O)6] Br3 2. [Cr(NH3)6] Cl3 3. K3[FeF6] 4. [Zn(OH)4]-2
5 answers
asked by
Rachel
6,105 views
As level chemistry
Which molecule are planar 1.NF3 2.Ccl4 3.C3H6 C3H8
4 answers
asked by
Tahir
3,650 views
C7H6O3(s) + C4H6O3(l) → C9H8O4(s) + HC2H3O2(l)
is the equation. At 20 degree celsius, how many liters of acetic acid, HC2H3O2,
7 answers
asked by
Emat
3,765 views
Which of the following choices is NOT a potential application of the solubility product constant?
A. Use (K sp) to find
7 answers
asked by
Anonymous
2,483 views
Consider the reaction: 2 SO2 (g) + O2 (g) ⇋ 2 SO3 (g)
4.0 mol of SO2 and 2.2 mol of O2 were placed in a 10 L flask and allowed
5 answers
asked by
Johnny
2,623 views
Calculate the relative molecular mass of silver trioxonitrate(v)
6 answers
asked by
Simdy
2,516 views
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