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Chemistry
Page 13
Questions (96,987)
25cm3 of a solution of 0.1mol dm-3 NaoH reacts with 50cm3 of a solution of hydrochloric acid.What is the molarity of the acid
7 answers
asked by
jonah
7,818 views
if 3 mole of of calcium react with 3 mole of oxygen then what
substance is limiting reactant?
5 answers
asked by
Tsion
2,646 views
Calculate the theoretical amount of .5M NaOH that it would take to neutralize approx. 2.0 g KHP. KHP is a monoprotic acid, the
5 answers
asked by
Brad
4,859 views
In which situation can Le Chatelier’s principle be applied?(1 point)
It can be applied when a reaction happens in a single
7 answers
asked by
bill nye the science guy
2,168 views
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
8,620 views
1- Use the reaction to complete the sentence.
2CO + O2 → 2CO2 Carbon monoxide and oxygen combine to produce carbon dioxide. The
25 answers
asked by
Gaia
8,427 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
27,898 views
A buffer is prepared using acetic acid, CH3COOH, (a weak acid, pKa = 4.75) and sodium acetate, CH3COONa (which provides acetate
12 answers
asked by
kevin
3,007 views
What is the percent yield of CO2 if a reaction using 10.0 g CO with excess O2 produces 12.8 g CO2?
2CO + O2 → 2CO2
5 answers
asked by
lala
6,189 views
What is the colour of:
1. Cu+ 2. Cu2+ 3. Cu3+?
5 answers
asked by
Alan
7,514 views
What is the ph of 2.5 M solution of HClO4?
5 answers
asked by
Josh
4,080 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
4,915 views
A metal x with relative atomic mass 56 forms an oxide with formula x2O3 . How many grams of metal will combine with 10g of
28 answers
asked by
Harriet
2,760 views
what does
Zn( NO3)2 form in a half equation for redox ( reduction and oxidation )??
4 answers
asked by
Layzell-Marie
2,906 views
Write the formula for a complex formed between Zn2 and OH–, with a coordination number of 4.
5 answers
asked by
Aundrea
5,682 views
Nitrosyl bromide decomposes according to the following equation.
2NOBr (g)(equilibrium arrow) 2NO (g) + Br2 (g) A sample of NOBr
4 answers
asked by
jessie
11,724 views
For a particular redox reaction NO is oxidized to NO3^- and Cu^2+ is reduced to Cu^+ . Complete and balance the equation for
7 answers
asked by
Heather
5,647 views
16.3 L N2 at 25 °C and 125 kPa and 40.7 L O2 at 25 °C and 125 kPa were transferred to a tank with a volume of 5.50 L. What is
4 answers
asked by
Anonymous
5,880 views
what do you observe in the displacement reaction of zinc and lead nitrate?
also, what is the symbol equation for this reaction?
5 answers
asked by
Nabiha
5,006 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
2,356 views
A compound contains only nitrogen and hydrogen and is 87.4% nitrogen by mass. A gaseous sample of the compound has a density of
5 answers
asked by
EM
5,361 views
85ml of 0.1M h2so4 solution is titrated against 0.1N koh solution . Calculate the concentration of salt formed when the acid is
4 answers
asked by
Piyush
4,007 views
what occurs during the reaction below
4Hcl+MnO2-->MnCl2+2H2O+Cl2 1.the manganese is reduced and its oxidation number changes from
5 answers
asked by
Tina
4,861 views
What is the solubility of PbI2 in 0.4 M KI given the solubility constant of PbI2 is 7.1 x 10-9
a. 3.5 x 10-3 M b. 1.2 x 10-3 M c.
6 answers
asked by
Christine
3,147 views
What is the mass of 3.01 x 10^22 iron (II) ions, Fe^2+?
5 answers
asked by
Syndra
3,371 views
Could a buffer system employing H3PO4 as the weak acid and H2PO4^- as the weak base be used as a buffer system within cells?
5 answers
asked by
Candice
3,606 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
1,525 views
what is the OH concentration of a solution with a pH of 12.4
4 answers
asked by
Anonymous
2,281 views
•Which of the following solutions will be the best buffer at a pH of 9.26? (Ka for HC2H3O2 is 1.8 x 10–5; Kb for NH3 is 1.8
4 answers
asked by
anita
6,880 views
A sample of a hydrate of CuSO4 with a mass of 250 grams was heated until all the water was removed. The sample was then weighed
5 answers
asked by
cam
3,650 views
how many kg of h20 must be added to 75.5g of Ca(NO3)2 to form a 0.500 m solution?
5 answers
asked by
lynda smith
3,430 views
A 1.575 g sample of ethanedioic acid crystals, H2C2O4. xH20 was dissolved in water and made up to 250cm^3 . One mole of the acid
6 answers
asked by
Jack
5,637 views
The combustion of methanol (CH3OH) forms carbon dioxide and water vapor. A combustion reaction refers to a reaction of a
5 answers
asked by
Anonymous
4,805 views
how many ions are present in 0.5 mol of sodium oxide?
thanks
6 answers
asked by
freddyyyyy!
2,825 views
When 34.8grams of potassium sulphate was dissolved in 500cm cubed distilled water.calculate :the concentration of potassium
5 answers
asked by
lucy
1,554 views
Calculate the relative molecular mass of silver trioxonitrate(v)
6 answers
asked by
Simdy
2,475 views
a considerable amount of heat is required for the decomposition of aluminum oxide.
2Al2O3-> 4Al(s)+ 3O2(g) change in heat= 3352KJ
5 answers
asked by
Skye
6,174 views
In a particular redox reaction, MnO2 is oxidized to MnO4– and Cu2 is reduced to Cu . Complete and balance the equation for
7 answers
asked by
BOB
9,215 views
Suppose that a 10-mL sample of a solution is to be tested for Cl- ion by addition of 1 drop (0.2mL ) of 0.15 M AgNO3 .
What is
5 answers
asked by
Josh
3,271 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
3,212 views
A 30.0 mL sample of 0.165 molL−1 propanoic acid (Ka=1.3×10−5) is titrated with 0.300 molL−1KOH.
Calculate the pH at 0,
5 answers
asked by
Sam Dowen
7,204 views
How many grams of HCl must be used to produce 10.0L of chlorine gas at STP?
Reaction: 2HCl (g)--->H2 (g)+Cl2 (g)
7 answers
asked by
Cliff
6,361 views
You have a stock 0.100 M solution of KMnO4 and a series of 100-mL volumetric flasks. What volumes of the stock solution will you
7 answers
asked by
confused
2,535 views
Calculate [OH-] and pH for the following strong base solution: 10.0 mL of 0.0105 M Ca(OH)2 diluted to 500.0 mL
5 answers
asked by
Kendall
3,065 views
If all the students placed their "unused" standard sodium hydroxide back into the original container what would be the likely
4 answers
asked by
Ana
769 views
Consider the voltaic cell
Zn(s) + Cu{2+}(aq)--> Zn{2+}(aq)+Cu(s) {}=charge Under standard conditions, what is the maximum
4 answers
asked by
Ethan
7,231 views
what is the oxidation number of Carbon in C6H12?
thank you!
4 answers
asked by
Jake
3,588 views
Which reactants could be used safely to prepare potassium chloride?
1. aqueous potassium hydroxide and dilute hydrochloric acid
4 answers
asked by
Marrion
1,963 views
An 89.3 mL sample of "wet" O2 (g) is collected over water at 21.3oC and a barometric pressure of 756 mm Hg(vapor pressure of
5 answers
asked by
Anonymous
2,843 views
When copper (II) nitrate reacts with sodium hydroxide, copper (II) hydroxide is produced. How many grams of copper (II)
4 answers
asked by
Ariel
3,505 views
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