Answer:
Strong acids completely ionize while weak acids partially ionize
Which pair of formulas represents two compounds that are electrolytes?
C5H12 and CH3OH
HCl and NaOH
HCl and CH3OH
C5H12 and NaOH
The pair of formulas represents two compounds that are electrolytes are HCl & NaOH.
What are electrolytes?Electrolytes are the solutions which contains positive or negative ions in it as a result of which it conducts electricity.
C₅H₁₂ & CH₃OH are not electrolytes as they will not dissociate into their respective ions.HCl & NaOH both are electrolytes as they dissociate into their ions in the solution form.Among HCl & CH₃OH, only HCl is a electrolyte and methanol is a non electrolyte.Among C₅H₁₂ & NaOH, NaOH is a electrolyte and C₅H₁₂ is a non electrolyte.Hence pair of electrolytes are HCl & NaOH.
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How much more would a 20.0 gallon tank for propane
(C3H3) weigh if it was originally empty, 1 gallon = 3.8 L, but now has a
pressure of 2.4atm at a temperature of 27 Celsius?
Give your answer in grams.
Answer: 20 + 1 + 3.8 + 2.4 +27 = 54.2
Explanation: 20 gallons plus 1 gallon plus 3.8 plus 2.4 plus 27 equals to a total number of 54.2 gallons for the propane.
Direct ethanol fuel cells (DEFCs) have shown some promise as a viable option for providing "green" energy to small electrical devices. Calculate E° for the reaction that takes place in DEFCs:
C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
Use the following values.
∆G°H2O(l) = -237 kJ/mol
∆G°O2(g) = 0 kJ/mol
∆G°CO2(g) = -394 kJ/mol
∆G°C2H5OH(l) = -175 kJ/mol.
Eo = ? V
The emf of the cell from the reactions and the change in free energy is 2.8 V.
What is the Eocell?The Eocell refer to the emf of the cell under standard conditions. In this case, it can be obtained from the free energy of the values of the reactants and products.
Now, given; C2H5OH(l) + 3O2(g) → 2CO2(g) + 3H2O(l)
ΔG°rxn = [2(-394) + 2( -237)] - [( -175 ) + 0 ]
= [(-788) + (-474)] + 175
= -1087 kJ/mol
Also;
ΔG° = -nFEocell
Eocell = ΔG° /-nF
Eocell = -1087 * 10^3/-(4 * 96500)
Eocell =-1087 * 10^3/386000
= 2.8 V
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The normal boiling point of a liquid is 282 °C. At what temperature (in °C) would the vapor pressure be 0.500 atm? (∆Hvap = 28.5 kJ/mol)
For a normal boiling point of a liquid is 282 °C, the temperature is mathematically given as
T2=181.55°C\
What temperature (in °C) would the vapor pressure be 0.500 atm?Generally, the equation for the gas is mathematically given as
ln(p1/p2)=dHvap/R(1/T2-1/T1)
Therefore
ln(1/0.26)=23500/8.214(1/T2-1/555)
T2=181.55^C
In conclusion
T2=181.55°C
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Which of the following compounds' solubility will not be affected by a low pH in solution?
O AgBr
O NICO3
O CO(OH)2
O PbF2
O Cus
The compound solubility which will not be affected by a low pH in solution is AgBr.
What is pH?pH is a measure of the acidity or basicity of any solution and according to the pH scale 0 to 6.9 shows the acidity, 7 is neutral and 7.1 to 14 shows the basicity of any solution.
AgBr is sparingly soluble in water and not soluble in acids, so if we low the pH of the solution towards the acidity its solubility not affected.NiCO₃ is a basic salt and and shows solubility in the acidic medium so change in pH will affect its solubility.Co(OH)₂ it is also a basic compound and shows its solubility in the acidic medium and get affected when change in pH takes place.PbF₂ is a strong base and also shows solubility in the acidic medium easily, so get affected when change in pH takes place.In CuS, sulphide is basic ion and whole compound shows solubility in the acidic medium and get affected when low pH of solution takes place.AgBr is not affected by a low pH in solution.
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is KNO a strong acid?
Answer:
First of all, it's KNO₃ not KNO.
Second, KNO₃ is neither an acid nor it is a base, infact, it is a salt and therefore it's neutral.
hope that helps...
80.0 liters of oxygen is collected over water at 50.0 °C. The atmospheric pressure in the room is 96.00 kPa. What is the partial pressure of the oxygen?
Answer: 83.656 kpa
Explanation:
Use Dalton's law of partial pressures which states that the total pressure of a combination of gases is equal to the sum of the partial pressures of the constituent gases.
So we have,
P(total) = P(oxygen) + P(water vapour)
96.00 kpa = 12.344 + P(oxygen)
P(oxygen) = 83.656 kpa
An atom becomes an ion when there are
Question options:
unequal numbers of protons and electrons
equal number of protons, neutrons, and electrons
a different number of neutrons than protons
equal numbers of protons and electrons
Answer:
Unequal number of protons and electrons
Explanation:
When an atom loses or gains electrons, this affects its charge, thus creating it an ion (a charged atom)!
The value of AH° for the reaction below is -1107 kJ:
2Ba(s) + O₂(g) → 2BaO(s)
How many kJ of heat are released when 5.75 g of Ba(s) reacts completely with oxygen to form BaO(s)?
Select one:
O a. 96.3
O b. 26.3
O c. 46.4
O d. 23.2
Oe. 193
Answer:
C
Explanation:
We can use heat stoichiometry. Thus, convert from grams of Ba to moles of Ba; and use the ΔH value to calculate the amount of heat released. Hence:
[tex]\displaystyle 5.75\text{ g Ba}\cdot \frac{1\text{ mol Ba}}{137.33\text{ g Ba}} \cdot \frac{1\text{ mol}_{rxn}}{2\text{ mol Ba}} \cdot \frac{-1107\text{ kJ}}{1\text{ mol}_{rxn}} =-46.4 \text{ kJ}[/tex]
Therefore, about 46.4 kJ of heat was released.
In conclusion, our answer is C.
I really need an answer by tonight!
Water circulation created by prevailing wind systems. The Gulf Stream is an example.
The length of open sea over which wind can blow steadily to create waves.
The amount of dissolved salt in a liquid.
The distance from the crest of one wave to the crest of another.
Water circulation created by differences in density.
This is what moves forward and through a wave.
The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation.
As the amount of salt in water increases, the density of the water _________.
The type of energy possessed by moving water.
The rising of ocean water bringing nutrients up from the deep
1.
The water cycle
2.
vapor transport
3.
salinity
4.
increases
5.
decreases
6.
surface currents
7.
Coriolis Effect
8.
deepwater currents
9.
trough
10.
wave period
11.
wavelength
12.
water molecules
13.
energy
14.
crest
15.
fetch
16.
electrical
17.
kinetic
18.
downwelling
19.
upwelling
The water cycle iss a process which helps to circulate and replenish water on earth.
What is hydrology?Hydrology is the scientific study of water bodies , the changes that occur in them as well as the various features and behavior of water bodies such as oceans and rivers.
Water circulation created by prevailing wind systems. The Gulf Stream is an example up of the Coriolis effect.
The length of open sea over which wind can blow steadily to create waves is called fetch.
Salinity is the amount of dissolved salt in a liquid
The distance from the crest of one wave to the crest of another is called wavelength
Water circulation created by differences in density deepwater currents
Energy is what moves forward and through a wave.
The cyclical process of the changing state and movement of water around the Earth through evaporation, condensation, and precipitation is called water cycle.
As the amount of salt in water increases, the density of the water increases.
The type of energy possessed by moving water is called kinetic energy.
The rising of ocean water bringing nutrients up from the deep us called upwelling.
Therefore, the water cycle helps to circulate and replenish water on earth.
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Describe How did the sun form?
The Sun formed about 4.6 billion years ago in a giant, spinning cloud of gas and dust called the solar nebula. As the nebula collapsed under its own gravity, it spun faster and flattened into a disk.
Answer:
in space billons of year ago dust particles together to create solar nebula also the sun made with helium and hydrogen the sun will run out of energyhope it's helpful thanks
What type of charge do electrons have?
negative charge
positive charge
no charge
atomic charge
Answer:
negative charge
Explanation:
Neutrons have no charge, protons have positive charge, and electrons have a negative charge
Which is a property of acids in aqueous solutions?
O They feel soapy.
O They taste bitter.
They increase the concentration of H* ions.
O They decrease the concentration of H* ions.
Answer:
2 and 3
Explanation:
acids are known for being H+ donors so they increase concentration of h+ ions
Use the drop-down menus to name these structures
F
FICH
H
Answer:
What Structures??
Explanation:
Can you please explain the question more
Is Fe^+2 the same ion as Fe^2+?
Yes, it doesn't matter if you put the number first or the sign first therefore... +2 = 2+
No, Fe^+2 is a cation and Fe^2+ is an anion
Answer:
It doesn't matter because either or it's still a cation because its positive
What is the total energy required to break all the bonds in 1 mol hexane, c6h14
The enthalpy of formation or the total energy required to break all the bonds in 1 mol hexane and has a value of -198.67 kJ.
What is the energy of bond breaking?The energy of bond breaking is the energy required to break all the bonds in 1 mole of a substance.
This energy is also the energy required to form the bonds known as enthalpy of formation of that substance.
Therefore, the total energy required to break all the bonds in 1 mol hexane is known as it enthalpy of formation and has a value of -198.67 kJ.
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Pls help !
What happens to the speed of a tsunami wave as it approaches the shore?
It increases and then decreases.
It increases.
It remains at a constant speed.
It decreases.
Which term represents when a tsunami wave slows down as it reaches shore?
surfing
waving
sinking
shoaling
Answer: It decreases.
Explanation:
A molecule has two bonded atoms around the central atom. The central atom does not have any lone pairs. What is the geometry of the molecule?
Bent
Linear
Trigonal planar
Tetrahedral
Answer:
I think Tetrahedral
Explanation: HaHa I D K
Answer:
Linear
Explanation:
Because it has zero lone pairs and only two atoms.
Understanding the theory of plate tectonics can help people better understand Earth
movements. How can knowledge of plate tectonics help people living in areas prone to
earthquakes and volcanic eruptions?
Understanding the theory of plate tectonics can make people more prepared if a natural disaster occurs. By understanding the theory of tectonic plates, you can possibly predict when the next tectonic-plate related natural disaster will occur.
A constant volume of oxygen is heated from 100oC to 185 oC. The initial pressure is 4.1 atm. What is the final pressure?
Therefore, the final pressure of the oxygen is 5.51 atm.
How is the ideal petrol rule applied in real-world situations?Let's say an engineer wants to keep 500 g of oxygen at 1 atm and 125 degrees Fahrenheit in a container. The Ideal Gas Law is used to calculate the required capacity of a container before construction can begin.
Assuming that the oxygen behaves as an ideal gas and the volume is constant, we can use the ideal gas law to solve for the final pressure.
The ideal gas law states that:
PV = nRT
where:
P = pressure
V = volume
n = number of moles
R = gas constant
T = temperature
Since the volume is constant, we can rewrite the ideal gas law as:
P1/T1 = P2/T2
where:
P1 = initial pressure
T1 = initial temperature
P2 = final pressure
T2 = final temperature
We can plug in the given values and solve for the final pressure:
P1/T1 = P2/T2
4.1 atm / (100 + 273) K = P2 / (185 + 273) K
P2 = (4.1 atm / 373 K) * (185 + 273) K
P2 = 5.51 atm
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AgC2H3O2 + K2CrO4 = Ag2CrO4 + KC2H3O2 How many moles of silver chromate, Ag2CrO4 are produced in this reaction
Taking into account the reaction stoichiometry, 1 mole of silver chromate Ag₂CrO₄ are produced in this reaction.
Reaction stoichiometryIn first place, the balanced reaction is:
2 AgC₂H₃O₂ + K₂CrO₄ → Ag₂CrO₄ + 2 KC₂H₃O₂
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
AgC₂H₃O₂: 2 moles K₂CrO₄: 1 mole Ag₂CrO₄: 1 moleKC₂H₃O₂: 2 molesMoles of Ag₂CrO₄ formedBy reaction stoichiometry 2 moles of AgC₂H₃O₂ form 1 mole of Ag₂CrO₄.
In other words, according to this balanced chemical equation, 1 mole of silver chromate Ag₂CrO₄ are produced in this reaction.
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Which of the following ions is least likely to form colored compounds?
A) V^(4+)
B) La^(3+)
C) Ti^(2+)
D) Mn^(3+)
E) Cr^(3+)
Answer:
i think d maybe correct me if im wrong
Explanation:
La³⁺ ions are colorless compounds because they have a 4f⁰ electronic configuration. Therefore, option (B) is correct.
What are lanthanoids?The lanthanide series comprises 15 metallic chemical elements with atomic numbers 57 to 71, from lanthanum through the lutetium. These elements have chemically similar elements scandium and yttrium, which are often collectively called rare-earth elements.
The chemical symbol Ln can be used to refer to any lanthanide. They are f-block elements, corresponding to the filling of the 4f-shell. All lanthanoids form trivalent cations, Ln³⁺ are determined by the ionic radius, which decreases from lanthanum to lutetium.
The valence orbitals in lanthanides have f → f transitions that are much weaker and narrower than d → d transitions. In general, the colors of lanthanide complexes are far fainter than transition metal complexes.
The electronic configuration of the lantanum is [Rn]5d¹6s². In the +3 oxidation state, it has all shells fully filled therefore, no electron transitions are possible. Therefore, La³⁺ form colorless compounds.
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Energy and Chemical Reactions: Mastery Test 4 Select the correct answer. Which factor is defined as the average kinetic energy of a substance? A. the mass of the substance B. the volume of the substance C. the pressure of the substance D. the temperature of the substance
Answer:
D. Temp
Explanation:
Temperature is a mesure of the KE of the molecules/atoms of the substance
Calculate the root mean square velocity, in m/s, of carbon dioxide molecules at 100.0
Answer:
459.8m/s
Explanation:
T=Temperature in Kelvin
M=molar mass in kg/mol
Molar mass of CO2,
mm=44.01g/mol
=0.04401kg/mol
T =100.0C
= (100.0 +273) K
=373K
So,
vrms= sqrt(3×R×T/M)
vrms=sqrt(3×8.314×373.0/0.04401)
=459.8m/s
pls help mee with this
Answer:
C. Shield Volcano
Explanation:
Flow after flow pours out in all directions from a central summit vent, or group of vents, building a broad, gently sloping cone of flat, domical shape, with a profile much like that of a warrior's shield.
difference between saturated unsaturted and supersaturatted
Explanation:
Unsaturated solution: A solution with less solute that completely dissolves without leaving any remaining substance
Saturated solution: A solution with solute that dissolves until it can't dissolve anymore, leaving some of the remaining substance left.
Supersaturated solution: A solution that has more remaining substance left than a saturated solution and tends to crystallize more than a saturated solution.
How did you do? Rate your work on a scale of 1 to 5, with 5 as the highest score. Then write a brief evaluation of your work below. Note what you learned and what challenged you.
Blood samples are important for toxicology tests in crime forensics. However, there are other biological samples that are commonly used for post-mortem toxicology. Research three such biological specimens. Describe how they are collected and their significance.
u did a five because u are awsome.
Answer:
I would rate myself a 5 because I completed all the work with no issues.
Explanation:
Convert the following 59m to nm
Explanation:
[tex]1m = {10}^{ 9} nm[/tex]
[tex]59m = 59 \times {10}^{9} nm[/tex]
I hope it helped you
5.9 × 10⁹
Explanation:
1m = 10^-9 nm
=5.9 × 10⁹
=5.9 × 1 000 000 000
=5 900 000 000 nm
=5.9 ×10⁹
compare the boiling point of water at sea leavel to the boiling point in denver (altitude = 1 mile) Explain
Answer:
boiling point decreases in denver
Explanation:
in higher places
theres less atmospheric pressure
it takes less energy to bring water to the boiling point.
Less energy means less heat
which means water will boil at a lower temperature
wonderopolisorg
1. A weather balloon with a volume of 2000L at a pressure of 96.3 kPa rises and the pressure
decreases to 60.8kPa. Assuming there is no change in the temperature or the amount of gas,
calculate the weather balloon's final volume.
Answer:
3167 .8 liters
Explanation:
P1 V1 = P2 V2
96.3 * 2000 = 60.8 * V2 solve for V2 =3167.8 l