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Chemistry
Page 12
Questions (97,843)
How many drops (1 drop=0.05mL) of 0.20M KI must we add to 100.0 mL of 0.010M Pb(NO3)2 to get a precipitate of lead iodide to
6 answers
asked by
Cody
1,197 views
calculate the solubility of 10.1g of potassium trioxonitrate v dissolved in 50g of disstilled water at 25 degree celsius
4 answers
asked by
loveth
744 views
1) Which tube will be most 'yellow' at the end of the experiment?
a)Substrate Concentration: 0.006M Inhibitor: absent b)Substrate
1 answer
asked by
Kimberly
401 views
the image is a model of sulfuric acid that has a chemical formula of H2 SO4 in 1-2 sentences explain why creating models like
3 answers
asked anonymously
82 views
Imagine a graph. The x-axis is labeled "Time" and is measured in seconds, and the y-axis is labeled "Potential Energy" and is
1 answer
asked anonymously
63 views
A student is exploring the reaction seen here:
The student states that adding carbon dioxide or another acid to the system will
1 answer
asked anonymously
53 views
as we move down the group Mg, Ca, and Ba, what happen to the solubility of (a) sulfates, (b) hydroxides, (c) carbonates?
1 answer
asked anonymously
13 views
observation made when chlorine is bubbled through sodium iodide
4 answers
asked by
value mwende
4,586 views
what is the pH of a solution prepared by adding 0.50 mol KOH to 1.0 L of 0.30 M HNO3?
5 answers
asked by
jj re
2,712 views
HOW TO PREPARE 60PPM OF POTASSIUM DICHROMATE
3 answers
asked by
ELEZABETH
1,772 views
What mass of ethylene glycol C2H6O2, the main component of antifreeze, must be added to 10.0 L water to produce a solution for
13 answers
asked by
Saira
5,933 views
A dilute salt solution containing 6% salt is fed to an evaporator at rate of 10000 kg/h for a trail run. crystals formed along
4 answers
asked by
Patel bhavya
1,427 views
A cell can be prepared from copper and tin. What is the E° cellfor the cell that forms from the following half reactions?
Cu2+(a
7 answers
asked by
lucylu
5,642 views
If the cell emf of a Zn-Cu cell is 0.80 V
when the concentration of Zn2+ is 2.0M, what is the concentration of Cu2+?
5 answers
asked by
Emerson
3,006 views
The heat of combustion of propane is -2,220.1 kJ/mol
calculate the heat of formation, delta Hf, of propane given that delta Hf of
4 answers
asked by
Anonymous
4,559 views
Determine [H30+], [OH-], and pH.
A solution that is 0.655% HNO3 by mass (assume a density of 1.01 g/ mL for the solution).
4 answers
asked by
Nevaeh
5,885 views
Would a precipitate form if 200 mL of 0.006 M AgNO3 were added to 700 mL of a 0.005 M solution of K2CO3?
4 answers
asked by
Student12
1,377 views
Hydrogen (H2) and oxygen (O2) combine to make water (H2O) in the following equation.
6H2 + 3O2 → ?H2O How many water molecules
6 answers
asked by
Shottaflow3k
1,980 views
Write the expression of for the base dissociation constant for hydrazine, N2H4, a weak base. Hydrazine reacts with water to form
4 answers
asked by
Angie
5,366 views
Three volatile compounds X,Y, and Z each contain elements Q. The precent by weight of element Q in each compound was determined.
9 answers
asked by
Brianna
4,087 views
How do you account for the difference in volume of the solids, in terms of intermolecular bonding?
2 answers
asked by
Leeland Watson
137 views
If you have 10,000 grams of a substance that decays with a half-life of 14 days, then how much will you have after 70 days?
Show
4 answers
asked by
woo
111 views
My chem teacher gave us this problem
Twelve-gauge copper wire,like the kind commonly used in residential electrical systems, is
5 answers
asked by
Julissa
1,143 views
which gas is not obtained on a large scale by fractional distilation
7 answers
asked by
Davies Chibeka Kafwimbi
2,776 views
How much quantity of sodium chloride is needed to make 30 ml of a 2% isotonic drug (sodium chloride equivalent 0.20) solution?
A.
5 answers
asked by
Abhishek chouhan
1,790 views
iron (III) oxide is formed when iron combines with oxygen in the air. how many grams of Fe2O3 are formed when 16.7g of Fe reacts
5 answers
asked by
cambell
7,937 views
Explain briefly how pure dry crystals of calcium chloride could be obtained from a solution of calcium chloride.
10 answers
asked by
Assan Joof
2,224 views
How many gram of sodium fluoride should be added to 100000 liter of drinking water containing 0.6 ppm of sodium fluoride to
5 answers
asked by
Jessica
8,522 views
What is the percent by weight of nacl if 1.75gm of nacl is dissolved in 58.5gm of water.
5 answers
asked by
Laiba
1,557 views
"Identify the solid remaining when each of the following is heated (a) Lithium trioxonitrate (v). (b) Potassium trioxonitrate
3 answers
asked by
Solomon Boti
1,118 views
Homw many grams of copper sulfate pentahydrate (CuSo4 5H2O) would you heat to produce 29.8 g of water?
4 answers
asked by
Anne
1,691 views
Among the following Ka values, which represents the strongest acid?
A. Ka = 1.2 x 10-3 B. Ka = 3.4 x 10-5 C. Ka = 8.7 x 10-8 D.
4 answers
asked by
louren
4,413 views
Under constant-volume conditions the heat of combustion of glucose is 15.57 kJ/g. A 2.500g sample of glucose is burned in a bomb
4 answers
asked by
lily
2,466 views
9.0g of hydrated salted CuSO4 x H2O was dissolved in 500cm3 of water and it's concentration in moldm3 was experimentally found
4 answers
asked by
Francisca
379 views
how many milliliters of a 0.9 molar HCl solution are needed to react completely with 12 grams of zinc according to the following
4 answers
asked by
Chasm
1,148 views
the molar heat of vaporization for water is 40.79 kJ/mol. How would you express this heat of vaporization in joules per gram.
5 answers
asked by
Sienna
3,023 views
A 0.513 M solution of a weak base has a pH of 11.4. What is the Kb of the base?
5 answers
asked by
Martha
7,178 views
Calculate temperature when 0.50L sample or gas at 1.0 atm and 25degrees C is compressed to 0.05L of gas at 5.0 atm.
6 answers
asked by
la
2,517 views
What is the solubility of Ag2CrO4 in 0.100 M AgNO3? Ksp = 1.12 x 10-12
4 answers
asked by
hazel
1,118 views
water was added to 120.0g of a salt MCl2, to produce 60.0cm^3 of a saturated solution at 25celsius. its solubility at 25 celsius
4 answers
asked by
victor
602 views
When salt dissolves completely into water, which term is used to describe the water?
solvent concentration solute solution Does
20 answers
asked by
Can some please assist??
6,412 views
In the following experiment, a coffee-cup calorimeter containing 100 mL of H2O is used. The initial temperature of the
5 answers
asked by
Katherine
17,259 views
What is the maximum mass, in grams, of NH3 that can be produced by the reaction of 1.0 g of N2 and 1.0 g of H2 using the
6 answers
asked by
Katelyn
26,442 views
Anyone help with Water and Air Chemistry Quick Check? Please
7 answers
asked by
Mike
2,220 views
Identify any incorrect formulas. explain your answer.
a. Mg2(SO4)3 b. Rb3As c. BeCl3 d. NaF
6 answers
asked by
Minny
12,552 views
A solution in which [H+] is 1000 times greater than [OH-]
[OH-] = ?M
5 answers
asked by
Matt D
11,283 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
4,867 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
8,635 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
8,440 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
10,008 views
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