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Chemistry
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Questions (96,926)
Ex: [Cu] in river is 30 ppb, what is the molar concentration?
4 answers
asked by
Zukii
973 views
Which of the following electron configurations of neutral atoms represent excited states?
( ) [Xe]6s24f1 ( ) 2s2 ( )
7 answers
asked by
Garcia
21,042 views
Using the following data
1. CU3+ + 2e- ---> Cu+ E1= 1.28V 2. CU2+ + e- ---> Cu+ E2= 0.15V 3. Cu2+ + 2e- ----> Cu(s) E3= 0.34V 3.
5 answers
asked by
anna
8,746 views
What mass of hydrochloric acid (in grams) can be neutralized by 2.3g of sodium bicarbonate? (: Begin by writing a balanced
4 answers
asked by
stephen
7,808 views
Suppose you take a trip to a distant universe and find that the periodic table there is derived from an arrangement of quantum
5 answers
asked by
Anonymous
17,513 views
Ka=1.8x10^-5. How do you calculate the value of pKa?
7 answers
asked by
Vivian
13,703 views
How many grams of KOH are needed to neutralize 12.9 mL of 0.16 M HCl in stomach acid?
5 answers
asked by
Madi
11,995 views
The elements X and Y form a compound that is 40% X and 60%Y by mass. The atomic mass of X is twice that of Y. What is the
4 answers
asked by
Dora
5,866 views
Complete the mass balance expression for a saturated solution of Ag2CO3. Note at least one blank is a numeric coefficient.
4 answers
asked by
Lana
8,427 views
What mass of H2 would be produced by the complete reaction of the iron bar.
Hydrobromic acid dissolves solid iron according to
4 answers
asked by
just need help
10,038 views
Complete the charge balance equation for an aqueous solution of H2CO3 that ionizes to HCO3^- and CO3^2-
______ = ______ + _______
5 answers
asked by
Sam
7,011 views
25g of NH3 is mixed with 4 moles of O2 in given reaction. 4NH3(g)+5O2(g)-->4NO(g)+6H2O(1) Which is limiting reactant?
5 answers
asked by
Shimallis
1,442 views
If a mothball (C10H8) has a mass of 1.32 grams, how many naphthalene molecules does it contain?
If I'm right just multiply 1.32g
5 answers
asked by
Karisa (Check Answer)
9,812 views
A 0.250-g sample of a magnesium-aluminum alloy dissolves completely in an excess of HCl (aq) . When the liberated H2 (g) is
9 answers
asked by
Jake
7,029 views
what is the cation and anion of Na3PO4?
thanks
5 answers
asked by
rebekah
8,447 views
A gas sample at STP contains 1.15 oxygen and 1.55g nitrogen. What is the volume of the gas sample?
the answer 2.04. I want to
5 answers
asked by
Mark
12,325 views
A 10.0-g sample of solid NH4Cl is heated in a 5.00-L container to 900.°C. At equilibrium the pressure of NH3(g) is 1.51 atm.
NH4
4 answers
asked by
Clare
9,989 views
What is the molar concentration of sodium ions in a 0.450 M Na3PO4 solution?
6 answers
asked by
max
13,567 views
If you are given a 0.32 g piece of sodium metal to react with water, how many moles of HCl would it take to neutralize the
5 answers
asked by
Jim
2,932 views
The concentration of a solution is 284,000 ppm. How many grams of solute is contained in 100 grams of solution?
5 answers
asked by
Zizi
2,716 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
10,105 views
A 0.100 M solution of K2SO4 would contain the same total ion concentration as which of the following solutions?
A. 0.0800 M
7 answers
asked by
Michael
10,497 views
iridium has two isotopes. with mass numbers 191 and 193, and its average relative atomic mass is 192.23.calculate the relative
5 answers
asked by
daanyaal
9,846 views
How do you calculate the mass percent composition of nitrogen in NO2?
4 answers
asked by
Carlos
6,954 views
Given reaction 2NH3(g) + 3Cl2(g) → N2(g) + 6HCl(g), you react 5.0 L of NH3 with 5.0 L of Cl2 measured at the same conditions
5 answers
asked by
Ha
9,886 views
(Ksp= 5.0*10^-13)
1) Calculate the molar solubility of AgBr in 3.0×10^−2 M AgNO3 solution. 2) calculate the molar solubility
5 answers
asked by
Jonah
8,475 views
what volume of 16 sulfuric acid must be used to prepare 1.5 L of a 0.10 M H2SO4 solution
7 answers
asked by
kathy
7,964 views
What is the minimum amount of 6.0 M H2SO4 necessary to produce 19.0 g of H2(g) according to the reaction?
2Al(s)+3H2SO4(aq)→Al2
5 answers
asked by
anon
7,135 views
When used correctly, the volumetric flasks in the first year chemistry laboratory will produce a solution volume of 250.00 ±
7 answers
asked by
par
1,798 views
Pure acetic acid, known as glacial acetic acid, is a liquid with a density of 1.049 g/mL at 25°C. Calculate the molarity of a
5 answers
asked by
Matt
6,225 views
What is the chemical name for BeCrO4*5H2O?
5 answers
asked by
Brittany
4,891 views
Calculate the cell emf (in volts) for the following reaction at 25°C:
Ni(s) + 2 Cu2+(0.010 M) → Ni2+(0.0010 M) + 2 Cu+(1.0 M)
6 answers
asked by
Diana
4,106 views
Under standard conditions (298 K and 1 atm), which statement is true?
a] diamond converts to graphite spontaneously b] graphite
6 answers
asked by
Katherine
12,778 views
. What is the pH of a solution in which 15 mL of 0.10 M NaOH is added to 25 mL of 0.10
M HCl?
5 answers
asked by
Anonymous
3,392 views
Am I correct?
Deterioration of buildings, bridges, and other structures through the rusting of iron costs millions of dollars
4 answers
asked by
patrick
11,883 views
If a gas is 9 times as heavy as hydrogen which diffuse faster and by what factor
5 answers
asked by
Hawah
2,751 views
The fluorocarbon compound C2Cl3F3 has a normal boiling point of 47.6 ∘C. The specific heats of C2Cl3F3(l) and C2Cl3F3(g) are
5 answers
asked by
Tori
15,880 views
How many grams of chlorine gas are needed to make 5.40 x 10 6 g or a solution that is 1.40 ppm chlorine by mass?
4 answers
asked by
Dustin
5,887 views
Okay so Im doing a lab on preparation of K3[Fe(C2O4)3]*3H2O The final weight I got 2.835g. How can I find the theoretical yield
6 answers
asked by
Natash
7,059 views
You are a work study student in our chemistry department. Amy, your supervisor has just asked you to prepare 250ml of 2.00M
5 answers
asked by
Melissa
4,981 views
The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn.
For the following reaction
6 answers
asked by
jake
9,828 views
What does ammonium Iodide equation look like dissolved in water?
5 answers
asked by
tia
8,442 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
8,909 views
Treatment of gold metal with BrF3 and KF produces Br2 and KAuF4, a salt of gold.
Find the mass of the gold salt that forms when a
5 answers
asked by
john
5,720 views
Plastic articles can be chromium-plated by coating them with thin layer of graphite paste,placing them in a bath of aqueous
5 answers
asked by
harish
3,905 views
How many total atoms are in 1.0 moles of H2O ?
4 answers
asked by
HELP!!!
3,712 views
What mass of NO2 is formed by the complete reaction of 2 mol O3 with excess NO in the reaction?
O3 + NO --> O2 + NO2 I know the
4 answers
asked by
Anonymous
2,852 views
Balance the following equation for a half reaction that occurs in acidic solution. Use e– as the symbol for an electron.
Mo^3+
4 answers
asked by
Anonymous
7,432 views
A compound with the molar mass of approximately 142 g/mol has the composition 50.7% C, 9.9% H, and 39.4% N. What is its
4 answers
asked by
Jane
2,872 views
Copper(II) fluoride contains 37.42% F by mass. Use this % to calculate the mass of fluorine in grams contained 28.5 g of copper
6 answers
asked by
Cindy
8,001 views
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