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Chemistry
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Questions (98,004)
Using equations, show the formation of hydroxonium ions in an aqueous solution of tetraoxosulphate(VI) acid
15 answers
asked by
Ola Joseph
3,475 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☆
27,578 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
8,934 views
2C(s)+H2(g)+227.4kJ -> C2H2(g) is an endothermic reaction.
If 682.2 kilojoules are absorbed, how many moles of C2H2(g) are
5 answers
asked by
P
5,500 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
2,616 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
3,921 views
What is the chemical properties of tetraoxosulphate(vi)acid
9 answers
asked by
Comfort
1,566 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
22,364 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
5,851 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
5,365 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
406 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
9,663 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
7,415 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
4,049 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
...
6,948 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
4,847 views
What is the chemical formula for slime using glue and borax?
3 answers
asked by
Bren
1,089 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
3,924 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
8,671 views
A Balanced equation to represent the reaction between 1-pentanol and ethanoic acid. (Production of an ester)
5 answers
asked by
Shantel
10,858 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
2,320 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
6,557 views
Ammonium metavanadate reacts with sulfur dioxide in acidic solution as follows (hydrogen ions and H2O omitted):
xVO3^–^ + ySO2
5 answers
asked by
Ana
5,659 views
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
14,326 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
4,071 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
2,580 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
2,686 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
7,101 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
3,733 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
3,529 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
1,734 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
2,307 views
the net ionic equation of the ionization of HClO3 in water
5 answers
asked by
Anonymous
3,326 views
Conservation of mass unit test please I need these answers asap!!
17 answers
asked by
Anonymous
2,639 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
10,006 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
3,729 views
What type of reaction occurs between copper (II) oxide and carbon? Give a reason for your answer.
5 answers
asked by
Douglas
2,897 views
Compared to the process of extracting lithium from mineral deposits, the process of extracting lithium from evaporation ponds
7 answers
asked by
Josiah
5,580 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
8,482 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
8,356 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
5,722 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
3,808 views
write the net ionic equation for the unknown titration reaction in this experiment.
KHC8H4O4(aq) + NaOH(aq)----> KNaC8H4O4 +
7 answers
asked by
natash
3,969 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
4,403 views
Am asking on how a solid sample of lead ii chloride can be prepared using the following reagents dilute nitric acid, dilute
4 answers
asked by
Monicah
1,316 views
Calculate the total number of moles of gas produced from the decomposition of 10.0 g of guanidinium nitrate
I know that the
5 answers
asked by
Nesta
3,528 views
Hydrochloric acid and sodium hydroxide react to produce water and sodium chloride in an endothermic reaction. Which statement
5 answers
asked by
Anonymous
2,160 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
2,353 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
7,200 views
1. Which statement is true about the following molecule? (1 point)The molecule is composed of four atoms.The molecule contains
94 answers
asked by
cIATA
24,706 views
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