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Chemistry
Page 14
Questions (96,335)
Bomb calorimetry is best for determining heat values. Because we cannot have a bomb calorimeter for every pair of students, we
3 answers
asked by
just need help
3,082 views
What is the greatest source of error for the hydrolysis of salts and pH of buffer solutions lab?How would you minimize this
3 answers
asked by
Kim
1,574 views
Ammonia (NH3) boils at -33oC; at this temperature it has a density of 0.81 g/cm3. The enthalpy of formation of NH3(g) is
3 answers
asked by
Morgan
1,944 views
1. What volume will a mixture of 5.00 mol of H2 and 0.500 mol of CO2 occupy at STP?
4 answers
asked by
Ivy
681 views
on dissolveing 2.34g of solute in 40g of benzene . the boiling point of solution was higher than that of benzene by 0.81k. kb
3 answers
asked by
pranjali
603 views
A 0.170-mole quantity of NiCl2 is added to a liter of 1.20 M NH3 solution. What is the concentration of Ni2 ions at equilibrium?
3 answers
asked by
Mandy
3,665 views
is dilution of a solution the answer to acid or base pollution in this world? why?
3 answers
asked by
j
477 views
calculate the percent yield of Cl2 in the electrolytic decomposition of hydrogen chloride if 25 g of HCl produces 13.6 of
5 answers
asked by
Anonymous
5,810 views
1. Find the pH of a solution whose [H3O+] is 9.5 X 10^ -8 M.
2. What is the [H3O+] concentration of a solution with a pH of 5.45?
5 answers
asked by
kellin
5,666 views
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
1,173 views
The solubility of insoluble substances changes depending on the nature of the solution. Below are two solutions
in which Cu(OH)2
3 answers
asked by
Henry
2,495 views
Express each quantity as a mass in grams.
a) 3.70mol of H2O b) 8.43 x 10^23 molecules of PbO2
3 answers
asked by
Marty
1,149 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
60 views
If you had 106.35 grams of Cl, how much Na would be required to convert i all to NaCl. I worked this problem and got 41.83 grams
1 answer
asked by
Eliza
386 views
a sample of hydrocarbon of mass 51.2g was analysed and found to contain 12.8 grams of hydrogen. If the formula of hydrocarbon is
3 answers
asked anonymously
91 views
How many milliliters of 50% w/v dextrose solution and how many milliliters of 5% w/v dextrose solution are required to prepare
1 answer
asked by
Riek
59 views
Sharon combines potassium (K) and water (H2O), producing potassium hydroxide (KOH) and hydrogen(H2), as shown in the chemical
1 answer
asked by
dee
23 views
Sasha does an experiment that involves burning an 8 gram strip of magnesium metal in an open flame. After the experiment Sasha
1 answer
asked by
Demon
38 views
jayla did an investigation about the different states of matter as part of the investigation she wanted to change a liquid into
1 answer
asked anonymously
32 views
Construct the following diagrams and label them.An electrochemical cell with a salt bridge using copper and zinc electrode and
1 answer
asked by
Asu
15 views
1) How do I prepare 2M nitric acid from 65% concentrated nitric acid?
2) How do I prepare 17% ammonia from 25% concentrated
7 answers
asked by
candy
9,209 views
Calculate the mass of Mg metal required to consume 2560g of CO2 in the reaction. 2Mg+CO2_2MgO+C
6 answers
asked by
Asad khan
4,875 views
Use the equation below and determine what volume of O2 at STP is needed to react with 1.5 moles of C2H4?
Balanced equation: C2H4
7 answers
asked by
Casey
3,996 views
calculate the mass of silver deposited when a current of 2.6a is passed through a solution of a silver salt for 70mins ag=108,1
10 answers
asked by
MIRACLE IWUNZE
6,790 views
A.Write a brief procedure outling how would you prepare 250mL of a 0.150M solution of a CoCl2 from solid CoCl2 and distilled
5 answers
asked by
Armando
5,443 views
the reaction BrO3- + 3SO3 2- ---> has the rate law r= k[BrO3-][SO3 2-]. what is the order of the reaction with the respect to
7 answers
asked by
Tarkan
2,690 views
The atomic mass of nitrogen is 14 g/mol. The atomic mass of hydrogen is 1 g/mol. When the reaction produces 68 grams of ammonia,
11 answers
asked by
bill nye your moms a guy
4,318 views
Many labs keep bottles of 3.0M solutions of the common acid on hand. Given the following molarities of the concentrated acids,
4 answers
asked by
Chopsticks
2,962 views
Question 1
A) Use the periodic table and example bond table to answer the question. Example Bond Energies of Ionic Compounds
10 answers
asked by
Student
1,767 views
What is the millimolar solubility of oxygen gas,O2, in water at 20 degree celsius, if the pressure of oxygen is 1.00atm?
5 answers
asked by
Erin
5,826 views
Science
CHECK MY ANSWERS!!!!!!! 1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model
20 answers
asked by
DrBob222
6,526 views
Hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. Which statement
5 answers
asked by
Anonymous
2,114 views
How do you calculate the PH of a buffer solution prepared by mixing 75 mL of 1.0 M lactic acid and 25 mL of 1.0 M sodium
5 answers
asked by
nicki
5,762 views
How many milliliters of 0.100 M HNO3 are needed to neutralize the following solutions?
A. 45.0 mL of 0.667 M KOH B. 58.5 mL of
7 answers
asked by
Bekah
8,346 views
4. Suppose that an excess of propane, C3H8 , burns in 320 g of oxygen, How many moles of water will be formed?
C3H8 + 5 O2 --> 3
7 answers
asked by
Hannah
4,562 views
Write the balanced net ionic equation for the following chemical reaction: Concentrated hydrochloric acid, HCl, is poured into a
4 answers
asked by
Sophia
3,202 views
4. Vitamin C, M= 176.12 g/mol, is a compound of composed of carbon, hydrogen, and oxygen. Vitamin C is found in many natural
5 answers
asked by
IRA
4,306 views
An atom of potassium (K) has 19 protons: 18 electrons in its inner electron energy levels and 1 electron in its outer energy
4 answers
asked by
Josh
4,092 views
A mixture weighing 7.290 mg contained only cyclohexane, C6H12 (FM 84.159), and oxirane, C2H4O (FM 44.053). When the mixture was
7 answers
asked by
RJ
6,519 views
Determine pH of each solution:
b) 0.20 M CH3NH3I I did.... CH3NH3^+ +H2O -> CH3NH2 + H3O^+ 0.20 ---------------0--------------0
5 answers
asked by
ALISON
7,426 views
6.3 mg of a boron hydride is contained in a flask of 385 mL at 25. degrees C and a pressure of 11 Torr.
A. determine the molar
6 answers
asked by
Anonymous
4,922 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
5,351 views
A saline solution is 0.9% NaCl. What masses of NaCl and water would be required to prepare 50. L of this saline solution? Assume
5 answers
asked by
Eric
4,497 views
In a molecule of lithium sulfide there are two atoms of lithium and one atom is sulfur . Which statement about lithium sulfide
4 answers
asked by
Anonymous
1,271 views
Ionic bonds bond ions together
1 answer
asked by
connexus student
113 views
Consider the evaporation of methanol at 25.0 c: CH3OH(l)-- CH3OH(g)
I figured out that Delta G is 4.3 kJ. Find the Delta G at 25
4 answers
asked by
JP
3,797 views
Nitric acid is a strong acid. Does this mean that
a) HNO3 dissociates completely to H+ (aq) and NO3 ^1- (aq) when it dissolves in
3 answers
asked by
DrBob222 fan :)
1,516 views
A scientist heats 30 grams of calcium carbonate (CaCO3) in the chemical reaction shown. What is the total mass of the products?
(
5 answers
asked by
sebastian chapa
346 views
A first-order reaction has a rate constant of 0.547 min - 1. How long will it take a reactant concentration 0.14 M to decrease
4 answers
asked by
Andrea
1,222 views
write the balanced half reaction for the conversion of HOBr(aq) to Br2(aq) in acidic solution
4 answers
asked by
amethyst
2,822 views
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