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Chemistry
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Questions (97,929)
A model of an atom shows eight electrons in rings that represent different energy levels. How many electrons are in each energy
29 answers
asked by
oi
14,322 views
CHECK MY ANSWERS!!!!!!!
1) Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a
99 answers
asked by
☆Alexa☆
27,573 views
A 0.60mol sample of PCl3(g) and a 0.70mol sample of Cl2(g) are placed in a previously evacuated 1.0L rigid container, and the
5 answers
asked by
Anonymous
8,555 views
When the equation for the following reaction in basic solution is balance, what is the sum of the coefficients?
MnO2 +
5 answers
asked by
Wube
8,928 views
A solution is prepared by dissolving 4.9g of sucrose in 17g water. Calculate the boiling point, freezing point and osmotic
4 answers
asked by
humphrey
2,613 views
A solution is prepared in which a trace or small amount of Fe2+ is added to a much larger amount of solution in which the [OH-]
6 answers
asked by
DAN
5,363 views
HNO2(aq)+NH3(aq)⇄NH4+(aq)+NO2−(aq)
Kc=1×10^6 Nitrous acid reacts with ammonia according to the balanced chemical equation
5 answers
asked by
...
6,946 views
Which of the options explains low ionization energy?
a. When the valence electron is at the zeroth order b. When the valence
4 answers
asked by
Favour
403 views
How much reaction is complete when Kc=1,
options: a.10% b.25% c.50% d.100% please explain the answer
19 answers
asked by
Plzzzhelppppmeee
9,658 views
A 1.00 g sample of limestone is allowed to react with 100 cm^3 of 0.200 mol/dm^3 HCl. The excess acid required 24.8 cm^3 of
6 answers
asked by
Gary
7,413 views
What is the chemical formula for slime using glue and borax?
3 answers
asked by
Bren
1,083 views
in which chemical reaction is the number of atoms in the reactants the same as the number of atoms in the products?
a.
41 answers
asked by
stranger
22,359 views
Compared to the process of extracting lithium from mineral deposits, the process of extracting lithium from evaporation ponds
7 answers
asked by
Josiah
5,575 views
The ratio of the diffusion rates of two gases is given by the formula r1/r2=square root m2/square root m1 wherem1 and m2 are the
10 answers
asked by
HELP PLZ
8,668 views
Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0
7 answers
asked by
Gabriella
4,068 views
Tetraphosphorus trisulphide (P4S3) is used in the match heads of some matches. It is produced in the reaction 8P4+3S8 --> 8P4S3.
6 answers
asked by
Ana
9,709 views
A Ca(OH)2 solution has a pH of 8.0. Determine the values of [H3O+], [OH– ], and [Ca(OH)2] for the solution
4 answers
asked by
diana
3,917 views
A 108 mL gas sample has a mass of 77.96 mg at a pressure of 1140 mmHg and a temperature of 183 °C. Assume ideal gas behavior
5 answers
asked by
keitanako
6,553 views
Hydrogen (H2) and oxygen (O2) combine to make water (H2O) in the following equation.
6H2 + 3O2 -> ?H2O How many water molecules
10 answers
asked by
Samado
4,845 views
How do I prepare 90% formic acid from conc. formic acid (98%-100% of density 1.22g/ml)?
Please help me check if my calculations
5 answers
asked by
tricia
3,919 views
A Balanced equation to represent the reaction between 1-pentanol and ethanoic acid. (Production of an ester)
5 answers
asked by
Shantel
10,852 views
Using equations, show the formation of hydroxonium ions in an aqueous solution of tetraoxosulphate(VI) acid
15 answers
asked by
Ola Joseph
3,463 views
A student used 5.06g of a mixture of copper sulphate pentahydrate an salicylic acid in the performance of this experiment. The
4 answers
asked by
Zayn
2,317 views
What is the chemical properties of tetraoxosulphate(vi)acid
9 answers
asked by
Comfort
1,560 views
How many liters of Chlorine at STP will react with 35L of 02 at STP given the following reaction?
2Cl2(g) + 7O2(g) - 2Cl2O7(l)
6 answers
asked by
Nan
2,680 views
The pH of a liquid is a measure of how acidic or basic it is. The concentration of hydrogen ions in a liquid is labeled [H+].
7 answers
asked by
Tori
5,841 views
Ammonium metavanadate reacts with sulfur dioxide in acidic solution as follows (hydrogen ions and H2O omitted):
xVO3^–^ + ySO2
5 answers
asked by
Ana
5,656 views
Consider the following reaction:
PbCl2 + 2 NaOH → Pb(OH)2 + 2 NaCl What would be the major species observed floating in
5 answers
asked by
Sam
2,303 views
write the net ionic equation for the unknown titration reaction in this experiment.
KHC8H4O4(aq) + NaOH(aq)----> KNaC8H4O4 +
7 answers
asked by
natash
3,967 views
Which of the following statements best defines chemical equilibrium?
a state in which the concentration of the reactants equals
10 answers
asked by
cheeze
3,722 views
If 50 grams of water saturated with potassium chlorate at 23*C is slowly evaporated to dryness, how many grams of the dry salt
6 answers
asked by
Rachel
3,526 views
An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatography (GC) method. the same
4 answers
asked by
Jam
1,732 views
the net ionic equation of the ionization of HClO3 in water
5 answers
asked by
Anonymous
3,323 views
Consider the reaction: 2 SO2 (g) + O2 (g) ⇋ 2 SO3 (g)
4.0 mol of SO2 and 2.2 mol of O2 were placed in a 10 L flask and allowed
5 answers
asked by
Johnny
2,569 views
Which reaction shows that the enthalpy of formation of CS2 is Hf = 89.4 kJ/mol?
A. C(s) + 2S(s) CS2(l) + 89.4 kJ B. C(s) + 2S(s)
5 answers
asked by
Morgan
7,095 views
A 5.0 g sample of Cu(NO3)2-nH20 is heated, and 3.9 g of the anhydrous salt remains. What is the value of n?
I got as far as
7 answers
asked by
Rona
10,002 views
1) Calculate the volume of air at 30 degrees C and 1.00 atm that is needed to burn completely 10.0 grams of propane. Assume that
4 answers
asked by
OhGodChemistry
3,727 views
20) The ideal value of i (van't Hoff factor) for (NH4)3PO4.
A) 2 B) 5 C) 4 D) 3 E) 1 I know the answer but how are problems like
7 answers
asked by
Jessie
17,951 views
If im given mass percent and mass solvent how do I find mass solute and mass solution.
example: Mass percent = 3.8% and Mass
5 answers
asked by
Monique
8,478 views
Commercial vinegar was titrated with NaOH solution to determine the content of acetic acid, HC2H3O2. For 20.0 milliliters of the
4 answers
asked by
Sarah
8,353 views
Calculate Delte G Knot for H20(g) + 1/2 O2 <-> H2O2(g) at 600. K, using the following data:
H2(g) + O2(g) <-> H2O2 (g) K = 2.3 X
5 answers
asked by
Summer
5,720 views
Geraniol is a compound found in rose oil that is used in perfumes. What is the molas mass of geraniol if its vapor has a density
7 answers
asked by
Meg
3,805 views
Conservation of mass unit test please I need these answers asap!!
17 answers
asked by
Anonymous
2,635 views
Do you think it is more useful to have the percent by mass of water in hydrate or the percentage composition, assuming that you
5 answers
asked by
cazzy
4,400 views
Which statement about the number of protons and neutrons in a nuclear change is correct?(1 point)
The total number of neutrons
6 answers
asked by
asdfghjkl
4,038 views
The company you work for plans to release a waste stream containing 7 mg/L
of benzaldehyde . Assuming that benzaldehyde degrades
4 answers
asked by
Jazmin
2,349 views
Calculate the total number of F (Fluorine) atoms in 12.15 mol C2HBrClF3. The answer is 2.195 x 10^25 atoms, but I am not sure
6 answers
asked by
Bob
7,194 views
What type of reaction occurs between copper (II) oxide and carbon? Give a reason for your answer.
5 answers
asked by
Douglas
2,892 views
Liquid water can be separated into hydrogen gas and oxygen gas through electrolysis. 1 mole of hydrogen gas and 0.5 moles of
55 answers
asked by
hunter
9,842 views
How many grams of sucrose are dissolved in 400 grams of a 12% ogueaus solution of sucrose?
5 answers
asked by
Araceli
4,165 views
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