Answers
Answer:
it is letter c
Explanation:
the thing is the thing i need pionts
Answer:
b
Explanation:
I think the answer is b mmmmmmmmmm
Related Questions
will mark brainlist need help
Hydrochloric acid (HCl) and sodium sulfide react by forming the gas Hydrogen sulfide and aqueous sodium chloride. Write the complete and net ionic equation for the reaction
Answers
Answer:
0.219 mol HCI
Explanation:
Iron(II) sulfide reacts with hydrochloric acid according to the reaction:
FeS (s) + 2HCl (aq) → FeCl2 (s) + H2S (g)
A reaction mixture initially contains 0.223 mol FeS and 0.665 mol HCl.
Once the reaction has occurred as completely as possible, what amount (in moles) of the excess reactant remains?
How many moles are in 23 grams of potassium
Answers
Answer:
.588mol K
Explanation:
K has a molar mass of 39.1 g/mol. This means that one mole of potassium has a mass of 39.1 grams. We can use stoichiometry/dimensional analysis to figure out how many moles is equal to 23 grams.
[tex]23.0g K(\frac{1 mole}{39.1} ) = .588mol K[/tex]
Helppppp pleaseeee xx
Answers
Answer:
2.5 moles of O₂ = 5 moles of H₂O
Explanation:
The balanced equation for the reaction is given below:
2H₂ + O₂ —> 2H₂O
From the balanced equation above,
1 mole of O₂ reacted to produce 2 moles of H₂O.
Finally, we shall determine the number of mole of H₂O produced by the reaction of 2.5 moles of O₂. This can be obtained as follow:
From the balanced equation above,
1 mole of O₂ reacted to produce 2 moles of H₂O.
Therefore, 2.5 moles of O₂ will react to produce = 2.5 × 2 = 5 moles of H₂O.
Thus,
2.5 moles of O₂ = 5 moles of H₂O
Is it possible for a reaction with + ΔG° to still be spontaneous in the forward direction? Explain.
Answers
Answer:
See explanation.
Explanation:
Hello!
In this case, according to the thermodynamic definition of the Gibbs free energy:
[tex]\Delta G=\Delta H-T\Delta S[/tex]
In the scenario by which G>0 (nonspontaneous) it would be possible for reaction to have a G<0 (spontaneous) if:
- If H>0 and S>0, then the temperature should be increased until the process was entropy-driven for it to be possible.
- If H> and S<0, then it'd be impossible to have an spontaneous process.
- If H<0 and S>0 then the process was not spontaneous.
- If H<0 and S<0 it is possible if the temperature is not high enough to ensure the process is enthalpy-driven.
Best regards!
explain the following terms using examples basic oxide acidic oxide an amphoteric oxide
Answers
Answer:
Example of basic Oxide: sodium oxide which reacts with water to produce sodium hydroxide.
Example of Acidic Oxide: SO² in acidic oxide reacts with water and produces an acid.
Example of Amphoteric Oxide: ZnO(s)+2HC(aq)→ ZnCI2(aq)+H2O (I)
Explanation:
Hope this helped Mark BRAINLEST!!!!
How does air flow when a low-pressure center occurs in the
atmosphere?
Answers
Answer:
A
Explanation:
It is so because the low air pressure create vacuum and the air from high pressure area move toward the low air pressure.
Please..................
Answers
Sorry so what I think u should do is ask your teach or look up on how to do this problem
Consider the following reversible reaction.
Upper C (s) + Upper O Subscript 2 Baseline (g) double arrow Upper C Upper O Subscript 2 Baseline (g)
What is the equilibrium constant expression for the given system?
k Subscript e q Baseline = StartFraction left-bracket Upper C Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper C right-bracket left-bracket Upper O Subscript 2 Baseline right-bracket EndFraction
k Subscript e q Baseline = StartFraction left-bracket Upper C Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper O Subscript 2 Baseline right-bracket EndFraction
k Subscript e q Baseline = StartFraction left-bracket Upper C right-bracket left-bracket Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Subscript 2 Baseline right-bracket EndFraction
k Subscript e q Baseline = StartFraction left-bracket Upper O Subscript 2 Baseline right-bracket Over left-bracket Upper C Upper O Subscript 2 Baseline right-bracket EndFraction
Answers
Answer:
Keq = [CO₂]/[O₂]
Explanation:
Step 1: Write the balanced equation for the reaction at equilibrium
C(s) + O₂(g) ⇄ CO₂(g)
Step 2: Write the expression for the equilibrium constant (Keq)
The equilibrium constant is equal to the product of the concentrations of the products raised to their stoichiometric coefficients divided by the product of the concentrations of the reactants raised to their stoichiometric coefficients. It only includes gases and aqueous species. The equilibrium constant for the given system is:
Keq = [CO₂]/[O₂]
Answer:
C on edge
Explanation:
got it correct :)
Which property among the following is best suitable for metalloids
1 Brittle and behaves like a non-metal
2 Have the property of metals and non-metals
3 Malleable and ductile
4 Conducts electricity and behaves like a metal
Answers
Answer:
2. Have the property of metals and non-metals
Explanation:
A metalloid is a substance that posseses the characteristics of both metals and non-metals. In other words, it can be said to be an intermediary between metals and nonmetals.
According to this question, a metalloid
How is the kinetic energy of the particles of a substance affected during a phase change?
O Kinetic energy increases during exothermic changes and decreases during endothermic changes.
O Kinetic energy decreases during exothermic changes and increases during endothermic changes.
O Kinetic energy does not change, but the potential energy does.
O Kinetic energy changes in the opposite way that the potential energy changes,
Answers
TRUE OR FALSE! Please help
Answers
giving 300 pts if u get it correct I will put up a separate link so u can get the
Which gases makes up most of Earth’s atmosphere?
Question 1 options:
argon and water vapor
carbon dioxide and oxygen
nitrogen and oxygen
oxygen and argon
Question 2 (1 point)
What is the correct order of earth's atmospheric layers from bottom to top?
Question 2 options:
Mesosphere, Stratosphere, Troposphere, Thermosphere, Exosphere.
Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere
Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere.
Thermosphere, Mesosphere, Stratosphere, Troposphere Exosphere.
Question 3 (1 point)
Which characteristics makes the mesosphere different from the other layers of the atmosphere?
Question 3 options:
It is the lowest layer
It is the largest layer
It is the coldest layer
It is the thinnest layer.
Question 4 (1 point)
Based on the diagram above which change can be observed when moving from the troposphere into the stratosphere?
Question 4 options:
Air pressure decreases
Air particles increase
Temperature increases
Question 5 (1 point)
Certain gases in Earth’s atmosphere slow down the movement of energy away from Earth’s surface by absorbing and re-emitting infrared radiation. This helps to keep the surface of Earth at an average temperature of 15°C (59°F). What is this process called?
Question 5 options:
The Coriolis Effect
The Solar Effect
The Greenhouse Effect
The Global Warming Effect
Question 6 (1 point)
How might the increase of volcanic eruptions affect Earth?
Question 6 options:
It might produce more ozone in the atmosphere
It might decrease temperature across Earth
It might increase the carbon dioxide in the atmosphere
It might cause the Earth’s surface to absorb more oxygen.
\
Determine which heat transfers below are due to the process of conduction.
I) You walk barefoot on the hot street and it burns your toes.
II) When you get into a car with hot black leather seats in the middle of the summer and your skin starts to get burned when you touch the seats.
III) A flame heats the air inside a hot air balloon and the balloon rises.
IV) A boy sits to the side of a campfire. He is 10 feet away, but still feels warm.
Question 1 options:
I & II
III & IV
I, II, & IV
II, III, IV
Question 2 (1 point)
Saved
The heat transfer depicted in the image is MOST likely
Question 2 options:
circulation
conduction
convection
radiation
he method of heat transfer by which the sun energy reaches the earth is
Question 3 options:
conduction
convection
radiation
solaration
Question 4 (1 point)
Carol owns a two story house with a heating and cooling unit on each floor. In the winter she mostly uses the downstairs unit because the volume of warm air __________ warming the whole house through __________.
Question 4 options:
rises, convection
sinks, conduction
rises, conversion
sinks, radiation
Question 5 (1 point)
The prevailing westerlies are global winds that move from west to east and push most weather in this direction in the United States.
Question 5 options:
True
False
Question 6 (1 point)
Due to the Earth's rotation, global winds follow a curved path known as___.
Question 6 options:
Sea breezes
Wind Direction
Coriolis effect
Wind Chill effect
Answers
2) troposphere, stratosphere, mesosphere, thermosphere, exosphere
3) it is the coldest layer
4)(there is no diagram so i can’t help with that...if you dolmens it i will try to help)
5) The greenhouse effect
6) Volcanoes can impact climate change. During major explosive eruptions huge amounts of volcanic gas, aerosol droplets, and ash are injected into the stratosphere. ... But volcanic gases like sulfur dioxide can cause global cooling, while volcanic carbon dioxide, a greenhouse gas, has the potential to promote global warming.
———————————————————
# 1 and #2
———————————————————
(there is no image for the next one)
The next one is radiation
QUESTION #4: rises; convection
QUESTION #5: true
QUESTION #6: coriolis effect
*hope this helps*
Which statement is correct for a plant cell?
O A plant cell membrane forms a thick wall.
O A plant cell does not have a cell membrane,
O The cell membrane is inside the cell wall,
O The cell membrane is outside the cell wall,
Answers
Answer:
The cell membrane is inside the cell wall
Explanation:
Please help..... :(((
The last part says group 2 if you’re wondering
Answers
True or false. The geological features of the eastern part of South America and western Africa matched each other.
Answers
Answer:
True
Explanation:
If you look at a map they look like they connect and the have similarities like mountains
Answer:
It is true c:, I hope I helped yoy
Which of the following has the lowest entropy?
O A. Water solution
B. Water vapor
C. Ice
D. Water
Water
Answers
Answer: Ice
Explanation:
Answer:
the answer is B.
Explanation:
Because unlike the closed system, in which the entropic process cannot stop itself
Q7: Three identical flasks contain three different gases at standard temperature and pressure. Flask A contains
CH4, flask B contains O3, and flask C contains N2. Which flask contains the largest number of molecules?
Answers
Answer:
Flask A
Explanation:
Cause it has high gas temperature
A sample of oxygen had an initial volume of 4.0L and was at a standard pressure of 10 atm, what would the new volume be if the pressure was increased to 25.00atm?
Answers
The new volume would be 1.6 L
How to calculate the new volume of a substance if pressure changes?The best way to calculate the volume of a substance in this situation is to use Boyle's law:
P1V1 = P2V2
In this formula, the initial pressure multiplied by the initial volume is equivalent to the second pressure multiplied by the volume.
Let's now use the values given:
P1V1 = P2V210atm x 4 L = 25atm x V2V2 = 10 atm x 4 L / 25 atmV2= 40 /25V2 = 1.6 LLearn more about Volume in: https://brainly.com/question/1578538
Rotation: Choose ALL that are TRUE (15 points for you, Sorry I can't find the answer to it..)
Question 2 options:
Earth spins on its axis and has no tilt.
A day on a planet is the time it takes the planet to complete one rotation on its axis
A year on a planet is the time it takes the planet to complete one rotation on its axis
Earth spins on its axis at a 23.5 degree tilt
Answers
A day is one rotation
A day on a planet is the time it takes the planet to complete one rotation on its axis and Earth spins on its axis at a 23.5 degree tilt are the true statements.
What is rotation?Rotation is a process in which any body show movement of 360 degree at their own place.
Earth do rotation at its own place all the time with little tilt position of 23.5 degree and due to this day and night occurs in the earth. And earth do revolution in 365 days around the sun in the orbital and due to this movement different seasons occur in the earth.
Hence, option (2) & (4) is correct, i.e. Earth spins on its axis at a 23.5 degree tilt and a day on a planet is the time it takes the planet to complete one rotation on its axis.
To know more about rotation, visit the below link:
https://brainly.com/question/15734021
How many moles of gas are present at a pressure of 1.00 atm in a container that is 4.0 liters in a room that is 25°C?
A) 0.013 mol
B) 1.9 mol
C) 0.16 mol
D) 6.1 mol
One mole of gas is in a 2.0 L container at 1.0 atm pressure and 20°C. If the volume is doubled, and the temperature remains constant, what will happen to the pressure?
A) The pressure will quadruple.
B) The pressure will double.
C) The pressure will decrease by half. D) The pressure will decrease by one-quarter.
Answers
Answer:
A) 0.013 mol
Explanation:
B) The pressure will double.
Fill in the blanks 2. A forest is a purtier of- and following
Answers
Answer:
Odors and pollutant gases
Explanation:
If the temperature of 96.5 g of water increases from 25.2 YC to 37.6 YC, how much heat did the water absorb?
Answers
Answer:
Q = 5,006.6 J
Explanation:
Hello there!
In this case, for these calorimetry problems, it is possible for us to compute the heat absorbed or released by a substance by considering the involved mass, specific heat and temperature change:
[tex]Q=mC(T_2-T_1)[/tex]
Thus, since the mass of water is 96.5 g, its specific heat is widely known as 4.184 J/g°C and the temperature increases, the resulting heat turns out to be:
[tex]Q=96.5g*4.184\frac{J}{g\°C} (37.6\°C-25.2\°C)\\\\Q=5,006.6J[/tex]
Best regards!
The given values are:
Temperature,
[tex]T_1 = 25^{\circ} C[/tex][tex]T_2 = 37.6^{\circ} C[/tex]then,
[tex]\Delta T = T_2-T_1[/tex][tex]= 37.6-25.2[/tex]
[tex]= 12.4^{\circ} C[/tex]
Mass,
[tex]m = 96.5 \ g[/tex]As we know the formula,
→ [tex]Q = mC\Delta T[/tex]
By substituting the values, we get
[tex]= 96.5\times 4.184\times 12.4[/tex]
[tex]= 5006.6 \ J[/tex] (required heat)
Thus the response above is right.
Learn more about heat here:
https://brainly.com/question/15334876
10 gram sample of methane (CH 4 ) has the same number of molecules as 10 gram sample of O 2
Answers
The given question is incomplete. The complete question is:
10 gram sample of methane [tex](CH_4)[/tex] has the same number of molecules as 10 gram sample of [tex]O_2[/tex]. True or False
Answer: Thus the statement is False.
Explanation:
According to avogadro's law, 1 mole of every substance contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar Mass}}[/tex]
1. [tex]\text{Number of moles for methane}=\frac{10g}{16g/mol}=0.625moles[/tex]
Now 1 mole of [tex]CH_4[/tex] molecule contains = [tex]6.023\times 10^{23}[/tex] of molecules
0.625 mole of [tex]CH_4[/tex] molecule contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.625=3.76\times 10^{23}[/tex] molecules
2. [tex]\text{Number of moles for oxygen}=\frac{10g}{32g/mol}=0.3125moles[/tex]
Now 1 mole of [tex]O_2[/tex] molecule contains = [tex]6.023\times 10^{23}[/tex] of molecules
0.3125 mole of [tex]O_2[/tex] molecule contains = [tex]\frac{6.023\times 10^{23}}{1}\times 0.3125=1.88\times 10^{23}[/tex] molecules
The number of molecules are different.
HELP ME SOLVE THIS WORKSHEET
Answers
How many moles of Ca(NO3)2 must be added to 1.0 L of a 0.255 M HF solution to begin precipitation of CaF2(s)
Answers
Answer:
6.1×10^(-10) mol
Explanation:
CaF2(s) -----------> Ca2+(aq) +2F-(aq)
Ksp = [Ca2+][F-]^2
Given data
[F-] = 0.255 M
∴ The concentration of Ca2+required to start the precipitation
[Ca2+] = Ksp / [F-]2
= (4.0 X 10^-11) /(0.255)^2
= 6.1×10^(-10) M
Here the volume is 1.0 L
∴ The number of molesof Ca(NO3)2 must be added to 1.0 L of a1.0 L of a 0.255 M HF solution to begin precipitation ofCaF2 (s)= 6.1×10^(-10) mol
Changing the size and shapes of wood would be a chemical change.
O True
O False
Answers
Answer:
False.
Explanation:
False because there's no chemicals making change. its a physical change
How many moles is 8.42 x 10^22 representative particles of iron (III) oxide?
Answers
Answer:
1 Mole = 602 billion trillion. 602,000,000,000,000,000,000,000; 6.02 X 1023 (this is known as Avogadro's number) ... 1 mole of H2O= about 1/3 of a cup (18 mL). It is helpful in ... x 1023 particles. Note: Particles could refer to atoms, molecules, formula units ... How many moles of Sulfur (S) are in 1.8 x 10 24 atoms of sulfur ?
Explanation:
Set of degenerate orbital in germanium
Answers
Answer:
Which set of orbitals are degenerate?
Degenerate is used in quantum mechanics to mean 'of equal energy. ' It usually refers to electron energy levels or sublevels. For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy, as shown in the diagram.
Explanation:
Answer:
Electron orbitals having the same energy levels are called degenerate orbitals, For example, orbitals in the 2p sublevel are degenerate - in other words the 2px, 2py, and 2pz orbitals are equal in energy.
How many moles is 130g of CoCl2
Answers
Answer:
1 mol
Explanation:
The mass of CoCl2 is 129.83. 130 divided by the mass is 1. This is to convert the mass given to mols that exist in the sample.
Mention three careers that have to do with STEM. Use complete sentences when you answer.
Answers
Statistician.
Software developer.
Physician assistant.
Dentist.
Cartographer.
Actuary.
Civil Engineer.
Psychologist.