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Chemistry
Page 22
Questions (96,840)
How many gram of hydrogen chloride acid containing 10% by mass of hydrogen chloride acid would be required to dissolve 13g of
5 answers
asked by
Mercy
1,206 views
Which aqeuous solution has a freezing point closest to that of 0.30M C12H22O11?
A) 0.075M AlCl3 B) 0.15M CuCl2 C) 0.30M NaCl D)
4 answers
asked by
Vic
2,468 views
Vinegar contains ethanoic acid (CH3OOH).titration of 3.00g of vinegar with 0.12M NAOH Solution requires 23.0cm3 to reach the
5 answers
asked by
Ekekhide
1,179 views
When 10.00 g of iron is burned in O2(g)to form Fe3O4 (s) , enough heat is generated to raise the temperature of 784 g of water
6 answers
asked by
Kyle
3,363 views
What is the molecular geometry shape for H2GeO and is Sel2 polar or non polar. Thanks
4 answers
asked by
Chemistry
5,753 views
11. The freezing point of a substance is ____ the melting point of the same substance. (1 point)greater than
less than equal to
5 answers
asked by
NIKE
2,419 views
Calculate the hydrogen ion concentration, in moles per liter, for solutions with each of the following pH values.
pH=1.10 im
5 answers
asked by
lyne
2,101 views
What would be the effect on the percent acetic acid if 30 mL of vinegar had been used in place of 50 mL? Explain?
4 answers
asked by
Gwyneth
1,358 views
What is occurring in the following reaction?
H2 + Cl2 → 2HCl A. H2 is being reduced. B. Cl2 is being oxidized. C. H2 is gaining
6 answers
asked by
louren
4,670 views
How many moles of Cu are produced when 0.25 moles of Cu2Se are completely reduced by an excess of hydrogen gas?
4 answers
asked by
Tayler
2,551 views
The reaction
2Na+ + 2Cl− ! 2Na + Cl2 is indicative of ? cell; the sign of the anode is ? ; and ? forms at the cathode. 1. an
5 answers
asked by
cheri
2,859 views
The titration of 10ml sample of vinegar requires 30ml of 0.20M of NaOH solution. Find molarity and mass percent concentration of
4 answers
asked by
Derrick
731 views
The products of the reaction between zinc and sulfruric acid are zinc sulfate, hydrogen sulfide, and water. Balance the equation
4 answers
asked by
Daniela
904 views
Does the temperature of the water affect the reaction of a lava lamp?
Does the size of the bottle affect how many blobs are
4 answers
asked by
eduarda
1,452 views
A buffer is prepared by adding 300.0mL of 2.0M NaOH to 500.0mL of 2.0M CH3COOH. What is the pH of this buffer? ka=1.8x10-5
5 answers
asked by
tina
5,442 views
Describe the preparation of 250cm3 of 0.05M of H2SO4 solution given the following stock solution specification; % purity= 98,
4 answers
asked by
Anonymous
747 views
Arrange the following amines in order of decreasing base strength. NH3, NH2Br, CH3NH2, (CH3)2NH
5 answers
asked by
help!!!
12,505 views
What volume of O2 is required to react with excess CS2 to produce 4.0L of CO2 Assume all gases at STP.
Not sure what I am doing
7 answers
asked by
T
13,076 views
What is the total molar concentration of all the ions in 0.0200 M solutions of the following salts in water?
0.0200 M KCl 0.0200
5 answers
asked by
Naomi
13,183 views
6g of metal M react completely with 23.66g of chlorine to form 29.66g of the metallic chloride. Find the empirical formula of
14 answers
asked by
Adigun
6,327 views
A solution is 5.0× 10–5 M in each of these ions: Ag , SO42–, Cl–, CO32– Which precipitate will form?
Ag2SO4 (Ksp =
9 answers
asked by
Anon
10,822 views
I stuck on this problem.
Can you help me to solve it? A reaction mixture in a 3.67L flask at a certain temp. initially contains
6 answers
asked by
Kim
8,026 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
4,992 views
An aqueous solution is 8.50% ammonium chloride, NH4Cl, by mass. The density of the solution is 1.024g/mL. Calculate the
7 answers
asked by
S
6,102 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
7,176 views
what valume of nitrogen reacts with 33.6 liters of oxgen to produce nitrogen dioxide?
10 answers
asked by
Reediet
3,177 views
1) Aqueous solutions of potassium sulfate and ammonium nitrate are
mixed together. Which statement is correct? A) Both KNO3 and
5 answers
asked by
mathew
9,223 views
If 3.21 mol of a gas occupies 56.2L at 44C and a pressure of 793 torr, what volume will 5.29 mol of this gas occupy under the
7 answers
asked by
Anonymous
13,069 views
If air contains 78%N2 by volume ,what is the solubility of nitrogen in water at 25°©?
10 answers
asked by
shegaw
9,426 views
) A saturated aqueous solution of NaBr at 20 oC contains 116 g NaBr / 100 H2O g. Express
this composition as percent by mass
4 answers
asked by
Mohamad kourabi
1,502 views
the activation energy for the decomposition of HI(g) to H2(g) and I2(g) is 186kj/mol. the rate constant at 555k is 3.42 x 10^-7
5 answers
asked by
Jim
9,481 views
Write an equation for the reaction between the iron filings and dilute tetra oxosulphate (vi) acid
7 answers
asked by
Al Ameen
2,822 views
2C2H2(g) + 5O2(g)→4CO2(g) + 2H2O(g)
a. Determine the enthalpy change for the reaction. ΔH = (4(-393.5)+ 2(-241.8)) – (2(227)
6 answers
asked by
Morgan
22,260 views
An excess of a divalent metal M was dissolved in a limited volume of hydrochloric acid. If 576cm^3 of hydrogen were liberated at
7 answers
asked by
Adebayo
1,878 views
Determine the number of moles of N atoms in 43.5 g of Mg(NO3)2.
Textbook answer: 1.43 mol N My answer: 43.5 g Mg(NO3)x x (1 mol
4 answers
asked by
Bob
3,183 views
Hydrogen and chlorine react to yield hydrogen chloride: H2+ Cl2 ( 2HCl. How many grams of HCl are formed from reaction of 3.56 g
5 answers
asked by
Anonymous
7,342 views
NaN3 is used in some automobile air bags. The impact of a collision triggers the decomposition of NaN3 as follows: 2NaN3(s) to
5 answers
asked by
HaldriecH
9,437 views
Which of the following reactions have a positive ΔSrxn? Check all that apply.
A(g) +B(g) -----> 3C(g) A(g)+ B(g)------> C(g) 2A
6 answers
asked by
Jerry
18,436 views
Strong base is dissolved in 665 mL of 0.400 M weak acid (Ka = 3.69 × 10-5) to make a buffer with a pH of 3.94. Assume that the
5 answers
asked by
craig
9,106 views
You find a compound composed only of element x and hydrogen,and know that it is 91.33% element x by mass. Each molecule has 2.67
4 answers
asked by
Andrew22
5,657 views
In one process 4 grams of sulphur was burnt in 48 decimetre cube of oxygen measured at room temperature. What is the limiting
5 answers
asked by
Jay
1,740 views
Which of the following substances have a standard heat of formation (ÄHf°) of zero?
O2(g) at 25.0 degree C and 1 atm Fe at 1200
5 answers
asked by
Anonymous
23,548 views
Deduce the number of nitrogen atoms in:
5.00 x 10^-3 mol of ammonia, NH3 and 4.601 g of nitrogen dioxide, NO2
6 answers
asked by
Syndra
4,288 views
an antifreeze solution is made by mixing ethylene glycol (density= 1116 kg/m^3) with water. suppose that the specific gravity of
5 answers
asked by
kai
5,985 views
Which of the following acid-base indicators should be used for the titration of NH3 with HBr? Kb of ammonia is 1.8 ×10−5.
1.
4 answers
asked by
Douglas
6,036 views
A solution contains 0.022 M Ag and 0.033 M Pb2 . If you add Cl–, AgCl and PbCl2 will begin to precipitate. What is the
4 answers
asked by
Sally
7,735 views
A solution of H2SO4(aq) with a molal concentration of 1.94m has a density of 1.119g/mL. What is the molar concentration of this
5 answers
asked by
Akle
6,168 views
Give the formula of each coordination compound. Include square brackets around the coordination complex. Do not include the
4 answers
asked by
HELP!!!!!!!!
3,947 views
When aqueous solutions of sodium sulfate and lead (II) nitrate are mixed lead sulfate precipitates out of soultion. Calculate
6 answers
asked by
Bella
9,906 views
Which of the following formulas -- NO, N2O, NO2, N2O, N2O4, AND N205 -- represent the empirical and molecular formulas of the
4 answers
asked by
Jeaninne
5,837 views
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