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Chemistry
Page 7
Questions (98,013)
calculate the number of atoms in 50 dm3 nitrogen gas
6 answers
asked by
ndalama
4,502 views
When an element is burnt in excess oxygen, is the oxide formed always:
1. a crystalline solid 2. greater in mass than the element
5 answers
asked by
Monica
2,810 views
Which is a stronger base in aqueous solution, IO- or IO3-? Explain.
4 answers
asked by
Lisa
5,171 views
A 1.2M NaOCl solution is prepared by dissolving solid NaOCL in distilled water at 298K. The hydrolysis reaction
OCl-(aq) + H2O(l)
7 answers
asked by
Anonymous
2,172 views
Calculate the solubility product of calcium hydroxide if the solubility of Ca(OH)2(s) in water at 25◦C is 0.011 M.
Choices: 1.
6 answers
asked by
vivian
3,794 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
7,253 views
Hi! I am taking the Unit 8 Lesson 10 chem test now and I have a C in this class so I need to get all the answers correct... If
7 answers
asked by
Yarielis
2,559 views
What charge in coulombs is required to deposit 0.301g Cu(s) from a solution of Cu^2+?
Cu^2+ 2e^- = Cu 0.301g/63.5g/mol = 4.7 x
4 answers
asked by
Steve
1,746 views
Calculate the volume of 0.300M HNO3 needed to complete neutralize 25.0ml of 0.250M Sr(OH)2
5 answers
asked by
Doleen
2,448 views
At 25 degrees C, a sample of NH3( molar mass 17 g) effuses at the rate of .050 mole per minute. Under the same conditions, which
4 answers
asked by
Anonymous
3,388 views
Which statement about an atom is correct?
A.The electrons had a negative charge and is found outside of the nucleus. B. The
7 answers
asked by
Yamshae
2,313 views
The number of moles of H2O produced in reaction of 50ml 1.0 M HCl and 50mL 1.0 M Naoh
6 answers
asked by
Amanda
9,728 views
How many moles of oxygen atoms are there in 2 moles of CuSO4?
5 answers
asked by
John
1,059 views
Enter the net ionic equation for the reaction of aqueous sodium chloride with aqueous silver nitrate
22 answers
asked by
ej
36,614 views
How Many Moles Of H2O Are Required To Produce 4.5 Moles Of HNO3 According To The Following Reaction: 3NO2+H2O = 2HNO3+NO
15 answers
asked by
Bake Samuel Burje
6,788 views
Calculate the number of moles of calcium chloride Cacl2 that can be obtained from 25g of limestone CaCo3 in the presence of
22 answers
asked by
Anonymous
7,956 views
A buffer is prepared using acetic acid, CH3COOH, (a weak acid) and sodium acetate, CH3COONa (which provides acetate ions, the
6 answers
asked by
kevin
3,599 views
What mass of aluminum is deposited electrolytically in 30 minutes by a current of 40A?
13 answers
asked by
Masre
4,032 views
Calculate the current that must be passed into a solution of aluminium salt for 30mins in order to deposit 1.5g of aluminium
6 answers
asked by
Janet
2,395 views
Determine the pH of a solution made by diluting 25mL of 6.0 M HCl until the final volume of the solution is 1.75 L
6 answers
asked by
Dylan
6,000 views
The concentration of a hydrochloric acid solution is 0.5mol/dm3.
How many moles of hydrochloric acid are present in 25cm3 of this
7 answers
asked by
Muhammad Haris
3,739 views
what does
Zn( NO3)2 form in a half equation for redox ( reduction and oxidation )??
4 answers
asked by
Layzell-Marie
2,926 views
if you disolve 2.00 mol KI in 1.00 L of water will you get a 2.00 M solution? explain please
4 answers
asked by
lynda smith
3,093 views
Calculate the [h30+] in a 0.010M solution of Sr(OH)2
5 answers
asked by
Saphire
2,984 views
An unknown sample was crystallized from benzene. on cooling to 0 degree centigrade in an ice bath the amount of crystals in
5 answers
asked by
abuudharr
4,116 views
why rate of forward reactionns slow down when a reversible reactions approches equilibrium stage?
4 answers
asked by
kashaf
431 views
How do you find unpaired electrons in a metal ion in CuSO4·5H20?
4 answers
asked by
May
2,334 views
A volume of 10.0 mL of a 0.00650 M solution of Cl- ions are reacted with 0.500 M solution of AgNO3. What is the maximum mass of
5 answers
asked by
Toni Jones
2,723 views
Calculate the percent ionization of a 0.15 formic acid solution in a solution containing 0.11 potassium formate.
I have the
5 answers
asked by
redgy
3,075 views
A 25.0 mL sample of 0.100 M propanoic acid (HC3H5O2, Ka = 1.3 ✕ 10-5) is titrated with 0.100 M KOH solution. Calculate the pH
4 answers
asked by
Tyler
2,075 views
Explain how sodium carbonate can be used to soften hard water
7 answers
asked by
alphaticus
3,081 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
10,261 views
A 0.03 mol sample of NH4NO3(s) is placed in a 1 L evacuated flask, which is then sealed and heated. The NH4NO3(s) decomposes
5 answers
asked by
jerry
5,406 views
how many ions are present in 0.5 mol of sodium oxide?
thanks
6 answers
asked by
freddyyyyy!
2,844 views
how many moles of oxygen atoms does 1.2x10^25 diphosphorus pentoxide molecules have?
hwo many oxygen atoms are in 1.25 mol
7 answers
asked by
lisa
3,805 views
3.22g of hydrated sodium sulphate, Na2SO4 X H2O were hearted to a constant mass of
1.42 g. Determine the value of x in the
5 answers
asked by
Freddy
2,550 views
Given the following acid dissociation constants, which acid has the strongest conjugate base?
a. HCN Ka = 6.2 x 10-10 b. HOCl Ka
5 answers
asked by
Christine
2,181 views
In a reaction Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq), 6.00 g of Mg was present at 0.00 min. After 3.00 min, 4.50 g of Mg
5 answers
asked by
Julia
3,238 views
Why must a hole be made in the aluminium lid
7 answers
asked by
Abbot
1,785 views
What is the [H3O+] of a solution with a pOH equal to 5.45?
5 answers
asked by
???
2,447 views
How does adding NH3 into the cell with CuSO4 affect the voltage measurement? The other cell has ZnSO4
4 answers
asked by
Marry
5,079 views
what is the oxidation number of Carbon in C6H12?
thank you!
4 answers
asked by
Jake
3,600 views
A particular metallic element, M, has a heat capacity of 0.36 J*g*K, and it forms an oxide that contains 2.90 grams of M per
12 answers
asked by
.
4,208 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
2,493 views
A sample is to be analyzed for its chloride content by precipitating and weighing silver chloride. What weight (g) of sample
4 answers
asked by
Jinjin
1,295 views
If 25cm^3 of NaOH solution containing 4.0g per litre of solution neutralised 50cm^3 of a monobasic acid,HX containing 1.8g of
4 answers
asked by
lucy
929 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
1,861 views
Gas is confined in a tank at a pressure of 10.0 atm and a temperature of 15o
C. If half of the gas is withdrawn and the
5 answers
asked by
Angie
2,043 views
28g of NH3 is dissolved in 500mL of water. What is the concentration of the resulting solution?
(I do not understand how to solve
5 answers
asked by
Amir
892 views
calculate the mass, in grams, of NaCl present in each of the following solutions.
6.25 g of 11.5% NaCl solution 452 g of 12.3%
4 answers
asked by
pat
3,472 views
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