Answer:
The correct option is;
A.) 15 g to 18 g
Explanation:
The solubility of sulfur dioxide at room temperature = 94 g/L of water forming sulfurous acid as follows;
SO₂ + H₂O ⇄ HSO₃⁻ + H⁺
Which is a partial reversibly association with water molecules
Whereby 1 liter of water weighs 1 kg
9.4 gram of SO₂ will dissolve in 100 g of water at room temperature of 23 to 24°C
The solubility increases as the temperature reduces therefore as shown from the sulfur dioxide solubility chart we have;
At 10°C the solubility of SO₂ (g) is midway between 150 g to 200 g per kg of water
Therefore;
The solubility of SO₂ (g) is between 15 g to 18 g per 100 of water.
The mass of SO2 in the given solution should be an option a 15g to 18g.
Calculation of the mass:Since the solubility of sulfur dioxide at room temperature = 94 g/L of water forming sulfurous acid likewise:
SO₂ + H₂O ⇄ HSO₃⁻ + H⁺
This represents the partial reversibly association along with water molecules
Here 1 liter of water weighs 1 kg
So we can say that
9.4 gram of SO₂ will dissolve in 100 g of water at room temperature of 23 to 24°C
Due to this, there is an increase in solubility this result in decrease in the temperature
Also, At 10°C the solubility of SO₂ (g) is midway between 150 g to 200 g per kg of water
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Carbon-14 is a common isotope of the element. How many electrons
does it contain?
O 14
O 12
O 8
O 6
Use the balanced equation below to answer the question that follows
6 CO2 + 6H2O - CH206 +60,
How many moles of water are needed to produce 4 moles of CH420?-
a.4
b. 6
c. 10
d. 24
CH3CH2CHCH2 + HCl in iupac
Answer:
But-1-ene and Hydrochloric acid
Explanation:
CH3CH2CHCH2
H H H
H - C- C - C = C
H H H
C - Carbon
H - Hydrogen
But-1-ene
H - Cl
H - Hydrogen = 1+ = Hard Acid
Cl - Chlorine = 1- = Hard Base
Hydrochloric acid
How do the HOX genes in the paddlefish match the HOX genes in human
Answer:
Hox are transcription factors that are evolutionarily conserved across bilaterians and, therefore, they share sequence homology between paddlefish and humans .
Explanation:
The Hox genes represent a family of homeodomain transcription factors that play roles in the development of the axial and appendicular skeleton, being therefore critical during embryonic development. In this case, the human Hox genes are homologous to homeobox genes found in the paddlefish. These genes have a DNA-binding domain of 60 amino acids which is evolutionarily conserved in bilaterian species including paddlefish and human species.
A scuba tank contains air at 2975 psi and 25°C. The tank is left in a car in the
hot sun and the temperature increases to 44°C. What will be the pressure (psi)
in the tank?
Answer:
The new pressure is 3164.58 psi.
Explanation:
We have,
Initial pressure, [tex]P_1= 2975\ psi[/tex]
Initial temperature, [tex]T_1=25^{\circ}=298.15\ K[/tex]
The tank is left in a car in the hot sun and the temperature increases to 44°C, [tex]T_2=44^{\circ} =317.15\ K[/tex]
Let [tex]P_2[/tex] is the final pressure in the tank. Gay Lussac's law,
[tex]P\propto T\\\\\dfrac{P_1}{P_2}=\dfrac{T_1}{T_2}\\\\P_2=\dfrac{P_1T_2}{T_1}[/tex]
Plugging all the values,
[tex]P_2=\dfrac{2975\times 317.15}{298.15}\\\\P_2=3164.58\ psi[/tex]
So, the new pressure is 3164.58 psi.
22.00 g of CO2 has a volume of 50.00 L and a pressure of 0.8210 atm. What must be the
temperature of the gas?
Answer:
T = 9.875K
Explanation:
The ideal gas Law is PV = nRT.
P = Pressure
V = Volume
n = amount of substance
R = 8.314 J/(K. mol)
T = Temperature in Kelvin
22g CO2
CO2 Molar Mass = 44g/mol
C = 12g/mol
O = 16g/mol
P = 0.8210atm
V = 50L
PV = nRT
0.8210 x 50 = 8.314 x 0.5 x T
41.05 = 4.157T
T = 41.05/4.157
T = 9.875K
At what temperature does the solid start meltin
-20°C
0°C
20"
80°C
Answer:
0 C.
Explanation:
What happens at the particle level during a chemical reaction?
Answer:
Reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.RT
Explanation:
Iodine-131 has a half-life of 8 days. How long would it take for the number of unstable nuclei in the sample to be reduced from 1,000 to 125?
Answer:
After one-half life: 16 mg
After 2-half lives: 8 mg
After 3-half lives: 4 mg
After 4-half lives: 2 mg
After 5-half lives: 1 mg
(5 half-lives) x (8 days/half-life) = 40 days
or doing it the mathematical way: Let z be the number of days to be found:
1 mg = 32 mg x (1/2)^(z / 8 days)
1/32 = (1/2)^(z / 8 days)
log (1/32) = (z / 8 days) x log (1/2)
z / 8 days = log (1/32) / log (1/2)
z = 8 days x log (1/32) / log (1/2) = 40 days
Explanation:
Iodine-131 has a half-life of 8 days, then it would it take for the number of unstable nuclei in the sample to be reduced from 1,000 to 125 is 512 days.
How do we calculate total time?Total time of the reduction of any substance from an initial concentration to a particular concentration will be calculated as:
T = (t)ⁿ, where
n = number of half lives
t = half life time = 8 days
1st half life: 1000 → 500
2nd half life: 500 → 250
3rd half life: 250 → 125
So number of half life times is 3. On putting values we get,
T = (8)³
T = 512 days
Hence total duration of time is 512 days.
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Which type of reaction is described by the following equation Na2O (s) + 2CO2 (g) + H2) (g) Produces 2 NaHCO3 (s)
Answer:
If the reaction is going from left to right it would be synthesis, if going right to left it would be decomposition.
Explanation:
Na2O (s) + 2CO2 (g) + H2O (g) = 2 NaHCO3 (s)
Left Side
Na = 2
O = 6
C = 2
H = 2
Right Side
Na = 2
O = 6
C = 2
H = 2
Ok so is balanced already, though initial equation in question had an error in regards to the left hand side the ) should have been an O.
Hmm
Na2O (s) + 2CO2 (g) + H2O (g) = 2 NaHCO3 (s)
If it was going from right to left would be decomposition
But going from left to right it would be synthesis
Plz help me with this question
In a undisturbed layer, how do we know which layer was deposited first ?
Answer:
It's the bottom layer.
Explanation:
Scientists use the Law of Superposition to determine the relative age of a layer of sedimentary rock:
The oldest rock layer is at the bottom of an undisturbed bed.
Thus, Layer A in the figure below was deposited first.
What is the percent by mass in a solution with 10.0 grams of solute and 25.0 grams of solvent?
Answer:
Percent by mass of solute is (10/35) x 100 = 28.57%
Percent by mass of solvent is (25/35) x 100 = 71.43%
Explanation:
10.0 grams of solute
25.0 grams of solvent
Total Mass = 35 grams
percent by mass = (Mass A / Total Mass) x 100
Percent by mass of solute is (10/35) x 100 = 28.57%
Percent by mass of solvent is (25/35) x 100 = 71.43%
pleaseeeeee yelp!!! 100 points
Question 10 Multiple Choice Worth 3 points)
(05.03 MC)
A glass of juice at 20°C was kept in the open. After 30 minutes, the temperature of the juice remained the same. Which statement is correct?
The temperature of the surrounding air was greater than 20 °C.
The temperature of the surrounding air was less than 20 °C.
The temperature of the juice was equal to the temperature of the surrounding air.
The temperature of the juice was less than the final temperature of the surrounding air.
Answer:
The answer would be B the temperature of the juice was the temperature of the surrounding air...trust me lolllllllllllllllll
A bobsled has a momentum of 4000 0 kg* m/s to the south. Friction on the track reduces its momentum to 500 kg* m/s to the south. What impulse is applied to the bobsled by the friction?
A. 6500 kg* m/s north
OB. 1500 kg* m/s south O
C. 6500 kg* m/s south
O 1500 kg* m/s north
Answer: 1500 kg•m/s north
Explanation:
A PE X
For the reaction NH4Cl (s)→NH3 (g) + HCl (g) at 25°C, ΔH = 176 kJ/moland ΔS = 0.285 kJ/(mol - K).
What is the ΔG, and will this reaction be spontaneous in the forward direction?
169 kJ/mol; no
-91 kJ/mol; yes
91 kJ/mol; no
91 kJ/mol; yes
please answer quick
Answer:
91kj/mol;no
Explanation:
Took this before I gotchu.
What is the ΔG, and will this reaction be spontaneous in the forward direction? 91 kJ/mol; no
What does ΔG mean in chemistry?
Gibbs is a free number of power converters
In the active and frequent use of the Gibbs free energy change equation, ΔG is calculated from the fixed values that scientists can measure: the enthalpy and entropy changes of the reaction, and the temperature at which the reaction occurs.
What is Delta G measured in?
joules
measured in joules in SI) is the maximum amount of non-expansion work that can be extracted from a closed system (one that can exchange heat and work with its surroundings, but no matter) at fixed temperature and pressure. This maximum can be attained only in a completely reversible process.
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The following half-reaction can be balanced in acidic solution:
N2O5 --> NH4+
How many electrons appear in the balanced equation?
A. 13e-
B. 14e-
C. 16e-
D. 18e-
Answer:
None of them, answer seems to be 24 unless I messed up
Explanation:
How many electrons appear in the balanced equation
What the heck do they mean, do they mean transferred?
N2O5 --> NH4+
Left Side
N 5+ Electrons 2 in central shell, 5 in outer
O 2- Electrons 2 in central shell, 6 in outer
Right Side
H 1+ Electrons 1 in central shell
N 3- Electrons 2 in central shell, 5 in outer
Hmm, ok so need to balance the half equation first, this is a redox reaction.
Hmm, so it's going to be something like
H2 + N2O5 → NH + O3
Step 1. Write down the unbalanced equation ('skeleton equation') of the chemical reaction. All reactants and products must be known. For a better result write the reaction in ionic form.
H2 + N2O5 → NH + O3
Step 2. Separate the process into half reactions. A redox reaction is nothing but both oxidation and reduction reactions taking place simultaneously.
a) Assign oxidation numbers for each atom in the equation. Oxidation number (also called oxidation state) is a measure of the degree of oxidation of an atom in a substance (see: Rules for assigning oxidation numbers).
H02 + N+52O-25 → N-1H+1 + O03
b) Identify and write out all redox couples in reaction. Identify which reactants are being oxidized (the oxidation number increases when it reacts) and which are being reduced (the oxidation number goes down). Write down the transfer of electrons. Carefully, insert coefficients, if necessary, to make the numbers of oxidized and reduced atoms equal on the two sides of each redox couples.
When one member of the redox couple is oxygen with an oxidation state of -2 or hydrogen with an oxidation state of +1, it is best to replace it with a water molecule.
O:3H+12O-2 → O03 + 6e-(O)
H02 → H+12O-2 + 2e-(H)
R:N+52O-25 + 12e- → 2N-1H+1(N)
c) Combine these redox couples into two half-reactions: one for the oxidation, and one for the reduction (see: Divide the redox reaction into two half-reactions).
O:3H+12O-2 + H02 → O03 + H+12O-2 + 8e-
R:N+52O-25 + 12e- → 2N-1H+1
Step 3. Balance the atoms in each half reaction. A chemical equation must have the same number of atoms of each element on both sides of the equation. Add appropriate coefficients (stoichiometric coefficients) in front of the chemical formulas to balance the number of atoms. Never change any formulas.
a) Balance all other atoms except hydrogen and oxygen. We can use any of the species that appear in the skeleton equations for this purpose. Keep in mind that reactants should be added only to the left side of the equation and products to the right.
O:3H+12O-2 + H02 → O03 + H+12O-2 + 8e-
R:N+52O-25 + 12e- → 2N-1H+1
b) Balance the charge. For reactions in an acidic solution, balance the charge so that both sides have the same total charge by adding a H+ ion to the side deficient in positive charge.
O:3H+12O-2 + H02 → O03 + H+12O-2 + 8e- + 8H+
R:N+52O-25 + 12e- + 12H+ → 2N-1H+1
c) Balance the oxygen atoms. Check if there are the same numbers of oxygen atoms on the left and right side, if they aren't equilibrate these atoms by adding water molecules.
O:3H+12O-2 + H02 + H2O → O03 + H+12O-2 + 8e- + 8H+
R:N+52O-25 + 12e- + 12H+ → 2N-1H+1 + 5H2O
Balanced half-reactions are well tabulated in handbooks and on the web in a 'Tables of standard electrode potentials'. These tables, by convention, contain the half-cell potentials for reduction. To make the oxidation reaction, simply reverse the reduction reaction and change the sign on the E1/2 value.
Step 4. Make electron gain equivalent to electron lost. The electrons lost in the oxidation half-reaction must be equal the electrons gained in the reduction half-reaction. To make the two equal, multiply the coefficients of all species by integers producing the lowest common multiple between the half-reactions.
O:3H+12O-2 + H02 + H2O → O03 + H+12O-2 + 8e- + 8H+| *3
R:N+52O-25 + 12e- + 12H+ → 2N-1H+1 + 5H2O| *2
O:9H+12O-2 + 3H02 + 3H2O → 3O03 + 3H+12O-2 + 24e- + 24H+
R:2N+52O-25 + 24e- + 24H+ → 4N-1H+1 + 10H2O
Step 5. Add the half-reactions together. The two half-reactions can be combined just like two algebraic equations, with the arrow serving as the equals sign. Recombine the two half-reactions by adding all the reactants together on one side and all of the products together on the other side.
9H+12O-2 + 2N+52O-25 + 3H02 + 24e- + 3H2O + 24H+ → 3O03 + 4N-1H+1 + 13H2O + 24e- + 24H+
Step 6. Simplify the equation. The same species on opposite sides of the arrow can be canceled. Write the equation so that the coefficients are the smallest set of integers possible.
2N+52O-25 + 3H02 → 3O03 + 4N-1H+1 + H2O
Based on the Lewis/electron dot representation
of the two atoms, predict the ratio of metal
cationic (+) atom to nonmetal anionic (-) atom in the compound
Answer:
A. 1:3
Explanation:
If we look at the ions shown in the image attached to the question, we will notice that we have aluminum (Al^3+), a trivalent ion combining with the iodide ion (I^-).
Aluminum can easily give out its three outermost electrons to three atoms of iodine. If aluminum gives out its three electrons, it achieves the stable octet structure. Iodine atoms have seven electrons in their outermost shell. They only need one more electrons to complete their octet. This one electron can be gotten by the combination of three iodine atoms with one atom of aluminum. One electron each is transferred from the aluminum atom to each iodine atom to form AlI3 with a ratio of 1:3.
Lewis dot structure is a diagrammatic representation of valence electrons in an atom of a molecule.
The ratio of the cations to anions in the given compound is 1:3.
In the given figure, Aluminum has 3 electrons, which can be donated to iodine. Aluminum has atomic number 13, this means that if the element donates three electrons then it will attain a stable electronic configuration.
In the Iodine atom, each iodine needs only one electron to complete its octet. Thus, three atoms of iodine will be required to gain electrons from aluminum.
Thus, the ratio cation to the anion is 1:3.
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plz help i need the answer ASAP If 6.20 cm3 of a 6.75 M (M = mol/dm3) solution are diluted to 85.6 cm3 with water, what is the concentration of the final solution?
A. 6.75 (6.20/85.6)
B. 6.75 (8.56/6.20)
C. 6.75 (6200/85.6)
D. 6.75 (85.6/6200)
a) A
b) B
c) C
d) D
Answer:
Option A. 6.75 (6.20/85.6)
Explanation:
The following data were obtained from the question:
Initial volume (V1) = 6.2cm³
Initial concentration (C1) = 6.75M
Final volume (V2) = 85.6cm³
Final concentration (C2) =.?
The final concentration can be obtained by using the dilution formula as show below:
C1V1 = C2V2
6.75 x 6.2 = C2 x 85.6
Divide both side by 85.6
C2 = (6.75 x 6.2) /85.6
C2 = 6.75 (6.2 / 85.6).
What's the sequence of a single complete engine cycle?
Intake, compression, power, exhaust
Intake, power, compression, exhaust
Compression, power, intake, exhaust
Intake, exhaust, compression, power
Answer:
Intake, compression, power, and exhaust
Explanation:
A four-stroke cycle engine is an internal combustion engine that utilizes four distinct piston strokes (intake, compression, power, and exhaust) to complete one operating cycle. The piston make two complete passes in the cylinder to complete one operating cycle.
The sequence of a single complete engine cycle is Intake, compression, power, exhaust. Therefore option 1 is correct.
1. Intake: In this step, the intake valve opens, allowing a mixture of air and fuel to enter the combustion chamber.
2. Compression: After the intake stroke, the intake valve closes, and the piston moves back up, compressing the air-fuel mixture. This compression increases the pressure and temperature inside the cylinder, preparing it for combustion.
3. Power: Once the air-fuel mixture is compressed, the spark plug ignites it. The burning mixture rapidly expands, generating a high-pressure force that pushes the piston down.
4. Exhaust: After the power stroke, the exhaust valve opens, and the piston moves back up, pushing the burned gases out of the cylinder and into the exhaust system.
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What happens to the motion of the atoms in a spoon after is placed in hot soup?
Answer:
they move faster
Explanation:
Answer:
They move faster.
What is the Log(10^-4)
Answer:
-4
Explanation:
[tex]log 10^{-4} = -4 log 10[/tex]
log 10 = 1
Therefore -4 log 10 = -4 x 1 = -4
) carbon + oxygen = _____________
E) calcium carbonate = ______________ + _________________
F) carbon + hydrogen = ____________
G) carbon + hydrogen + oxygen = ______________
H) water = ___________ + ___________
I) Iron + sulphur = _______________
J) magnesium + oxygen = ________________
M) magnesium oxide + water = ___________________
O) carbon monoxide + oxygen = ______________
Answer:
d)carbon(iv)oxide/carbon(ii)oxide
e)Calcium,carbon,oxygen
f)carnonhydride
g)Carbonhydrate
h)hydrogen+oxygen
I)Iron sulphide
j)Magnesiumoxide
m)magnesium hydroxide+hydrogen gas
d)carbon dioxide
Cracking of octane please help! Show the chemical formula and the diagrams
Answer:
Fuels made from oil mixtures containing large hydrocarbon molecules are not efficient as they do not flow easily and are difficult to ignite. Crude oil often contains too many large hydrocarbon molecules and not enough small hydrocarbon molecules to meet demand. This is where cracking comes in
Explanation:
In 450 BCE, Greek philosopher Democritus first thought of the existence
of tiny particles that compose everything around us. He named them
'atomos', meaning
A. Invisible
B. Particle
C. Indivisible
D. None of these
Reset Selection
Answer:
A. Invisible
Explanation:
Answer: Indivisible
Explanation: There was a brilliant philosopher named Democritus, and he proposed the Greek word atomos, which means uncuttable.
Synonyms for uncuttable are as follows:
Joined, inseparable, Indivisible, unbreakable, irreducible, impenetrable, unalterable, indissoluble, unified, permanent, immutable and unchangeable.
Why other answers are wrong:
I simply believe the other user may have had a minor typo which caused such confusion. Who knew one letter could effect an answer that much XD
What is the shape of the H2S molecule?
bent
pyramidal
linear
trigonal planar
Answer:
The answer is bent
Answer:
The molecule is bent
Explanation:
Which shows the correct order of steps in the formation of coal?
Layers of dead plants pile up - plant matter is buried by rocks and dirt - dead plants fall in swamp - plant matter is
compressed and is exposed to heat - coal forms
Plant matter is compressed and is exposed to heat - dead plants fall in swamp - layers of dead plants pile up - plant
matter is buried by rocks and dirt - coal forms
Plant matter is buried by rocks and dirt - dead plants fall in swamp - layers of dead plants pile up - plant matter is
compressed and is exposed to heat - coal forms
Dead plants fall in swamp - layers of dead plants pile up - plant matter is buried by rocks and dirt - plant matter is
compressed and is exposed to heat - coal forms
Answer:
it is Dead plants fall in swamp, Layers of dead plants pile up, Plant matter is buried by rocks and dirt, Plant matter is compressed and is exposed to heat, and Coal forms.
if iam right please make this into brainlest
The type of energy transferred by a wave in a medium is kinetic energy.
Answer:
The statement is true.
Explanation:
The different means by which the energy is transferred is commonly termed to be 'wave'.
Wave refers to the disturbance transmission from a specific point to another. Different sources are involved in this transmission. The vibration of particles helps in the flow of energy from one medium to another. Vibration leads to the formation of kinetic energy flowing from one medium to another.
Ammonia (NH3) Is base.
How best do you describe Ammonia when dissolved in water
B. Ammonia forms a neutral solution.
C. Ammonia forms a buffered solution.
d. Ammonia acts as base because has OH- and makes water accepts hydrogen.
Answer:
Ammonia accepts a proton from water
Explanation:
Let us quickly remind ourselves of the Brownstead-Lowry definition of an acid. According to Brownstd-Lowry, an acid is any substance that donates hydrogen ions while a base is any substance that accepts hydrogen ions. The hydrogen ion is also known as a proton.
If we look at the behaviour of ammonia in water;
NH3(g) + H2O(l) ----> NH4^+(aq) + OH^-(aq)
We can easily see that ammonia accepts a proton from water (this makes it a Brownstd-Lowry base) and the hydroxide ion is formed in the process. Water functions as the proton donor here.
Which term should replace the question mark?
Answer:
Can you explain a little bit more?
Explanation: