Answer:
Electrons
Explanation:
Consider the reaction H2O(g)+Cl2O(g)=2HClO(g). At equilibrium,the concentrations of the different species:[H2O]=0.077M,[Cl2O]=0.077M,[HClO]=0.023M. What is the equilibrium constant for the reaction at this temperature?
Choices: 0.089, 0.26, 3.9, or 11
The equilibrium constant K : 0.089
Further explanationGiven
Reaction
H₂O(g)+Cl₂O(g)⇔2HClO(g)
[H2O]=0.077M,[Cl2O]=0.077M,[HClO]=0.023M
Required
the equilibrium constant
Solution
The equilibrium constant or Kc is the value of the concentration product in the equilibrium state of the substance in the right segment divided by the product of the substance in the left section, each of which has a reaction coefficient raised
[tex]\tt K=\dfrac{[HClO]^2}{[H_2O][Cl_2O]}\\\\K=\dfrac{0.023^2}{0.077\times 0.077}\\\\K=0.08922[/tex]
As you move down a group, you will recall that the radius increases. Why do you think an increase in atomic radius would result in a lower ionization energy?
Answer:
Because as we move down the group size/ radius of atom increases due to increase in shells and screening effect. The hold of nucleus on valence electrons decreases and effective nuclear charge decreases so it is easy to remove electron from greater sized atoms as compared to smaller sized aroms.
Energy required to remove electron is ionization energy so greater sized atoms have low ionization energy.
Explanation:
Two reindeer are winding through the winter forest . They spot three owls ,two foxes and four bear . How many legs are there in total?
Answer:
40
Explanation:
8 + 8 + 8 + 16
The molar enthalpy of fusion for water is 6.008 kJ/mol. How much energy is released when 4.81 mol of water freezes?
Answer: The energy released when 4.81 mol of water freezes is 28.9kJ
Explanation:
Latent heat of fusion is the amount of heat required to convert 1 mole of solid to liquid at atmospheric pressure or energy released when 1 mole of liquid freezes to solid at atmospheric pressure.
[tex]\Delta H_{fusion}[/tex] = enthalpy change for fusion = 6.008 KJ/mole
Energy released when 1 mole of water freezes = 6.008 kJ
Energy released when 4.81 moles of water freezes = [tex]\frac{6.008 kJ}{1}\times 4.81mol=28.9kJ[/tex]
Therefore, the energy released when 4.81 mol of water freezes is 28.9kJ
ATP, the energy used inside a cell, is created in the Ribosomes
?true or false?
Answer:
false
Explanation:
because its made in the mitochondria
help is science, if you don't know the answer just don't put anything /:
Answer:
Light
Explanation:
Light is a good example of invisible particles. We cannot see light particles aka photon. We only know the light is present by the objects we see. Because we can only see objects when light reflects from them on our eyes.
[I could only think of one example if I can remember one more I'll edit it down]
Do acids lose or gain hydrogen ions?
Help
please
Answer: They lose them :)
Explanation:
What pieces of evidence do scientists use to support the current theory of rapid expansion?
Answer:
When looking at the radiation emitted by distant stars or galaxies, scientists see emission spectra 'shifted' towards the red end of the electromagnetic spectrum—the observed wavelengths are longer than expected. ... Something causes the wavelength of the radiation (emitted by faraway stars and galaxies)
An object at rest has equal forces acting on it. This can be described as a(n) ______ force.
Answer:
it would be balanced forces.
Explanation:
Balanced forces acting on an object do not change the objects motion.
How many grams of NaCl would be required
to react with 346 mL of 0.607 M AgNO3
solution?
Answer:
Mass = 12.27 g
Explanation:
Given data:
Mass of NaCl are required = ?
Volume of AgNO₃ = 346 mL (346 mL× 1L/ 1000 mL = 0.346 L)
Molarity of AgNO₃ = 0.607 M
Solution:
Chemical equation:
NaCl + AgNO₃ → NaNO₃ + AgCl
Number of moles of AgNO₃:
Molarity = number of moles / volume in L
0.607 M = number of moles / 0.346 L
number of moles = 0.607 M × 0.346 L
number of moles = 0.21 mol
now we will compare the moles of NaCl and AgNO₃.
AgNO₃ : NaCl
1 : 1
0.21 : 0.21
Mass of NaCl:
Mass = number of moles × molar mass
Mass = 0.21 mol × 58.44 g/mol
Mass = 12.27 g
Newton determined that the attractive force between two masses was DIRECTLY proportional to:
Answer:
This is Newtons 2nd Law: Force is directly proportional to the acceleration of the object, acceleration is inversely proportional to the mass of the object.
The green pigment required for photosynthesis is:
A. glucose
B. chloroplast
C. chlorophyll
D. carbon dioxide
The mass of a mole of a substance can be found using the ____ of the substance.
Answer:
mass
Explanation:
Answer:
mass mass mass mass mass
Consider the reaction: 2AB2 → A2 + 2B2 You start with one mole of AB2 and the reaction is done at constant pressure of 3.7 atm and 28.2 °C. Assume all gases behave like ideal gases. What is the value of the work (in J)?
Answer:
-2503.2J
Explanation:
At constant pressure, change in work follows the equation:
W = -P*ΔV
Where W is work, P is pressure (3.7atm) and ΔV is change in volume
We can obtain change in volume using ideal gas low:
ΔV = ΔnRT/P
Where Δn is change in moles (3moles of products - 2 moles of reactants = 1)
R is gas constant (0.082atmL/molK)
T is absolute temperature (28.2°C + 273.15 = 301.35K)
P is pressure (3.7atm)
ΔV = ΔnRT/P
ΔV = 1mol*0.082atmL/molK*301.35K/3.7atm
ΔV = 6.69L
And work is:
W = -3.7atm*6.69L
W = -24.71atmL
1atmL = 101.3J
-24.71atmL * (101.3J / 1atmL) =
-2503.2J
Part A:
Identify a property of water that contributes its movement through the capillary tubes. Explain how the
molecular structure of water contributes to this property.
Plants use a similar mechanism to move water through their stems. In a specific species of plant, the
vessels are approximately 0.3 mm in diameter.
Part B:
Estimate how tall this species of plant can grow. Explain how the molecular structure of the vessels can
be modified to increase the maximum height of the plant without changing the diameter of the vessels.
Answer:
Part A
i) A property of water that contributes to its movement through capillary tubes is adhesion, which is the capacity of water to stick to other surfaces
ii) Water has a polar molecular structure as such the hydrogen present in the water molecules form bonds with the oxygen present in the silicon oxide molecules from which the capillary tube is normally made
Part B.
i) From the given graph, the function appears to have a vertical asymptote at x = 0, therefore, the plant can grow infinitely tall
ii) The molecular structure of the vessel can be modified such that the walls incorporate more oxygen molecules per mole which will increase the number and the strength of the hydrogen bond between the water molecules and the walls of the plant vessel and therefore, increase the capillary action, the water height and the maximum height of the tree
Explanation:
Which transformations in the rock cycle require heat? Select all that apply.
Igneous rock to metamorphic rock
Metamorphic rock to sedimentary rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Igneous rock to sedimentary rock
Answer:
Igneous rock to metamorphic rock
Metamorphic rock to igneous rock
Sedimentary rock to metamorphic rock
Explanation:
In changing a rock through the listed processes heat is highly required.
Transformation from a rock to igneous rocks requires the most heat because the rock body must be molten.
Igneous rock to metamorphic rock is a metamorphic change that requires significant heat and pressure. The mineralogical fabric is affected by this change. In moving from metamorphic to igneous rock, the melting temperature of a rock must be attained in order for magma to form. Sedimentary changes to metamorphic rocks also require heat.Can I have an answer for this?
Mass of Aluminium: 27 [tex]\frac{gm}{mol}[/tex]
Mass of Ferous Oxide: 71.84 [tex]\frac{gm}{mol}[/tex]
Aluminium: 7.5 Moles Given
How many moles of Iron (II) oxide(FeO)?
_____________________________________SOLUTION:As there are 2 moles of aluminium involved and 3 moles of ferrous oxide So,
2 moles Al and 3 moles FeO
7.5 moles Al and x moles FeO
For X moles:
X = [tex]\frac{3\ x\ 7.5 }{2}[/tex]
X= [tex]\frac{22.5}{2}[/tex]
X= 11.25 [tex]\frac{gm}{mol}[/tex]
_____________________________________Best Regards,'Borz'What type of liquid is sucrose solution? (Salt solution, weak acid, etc)
Sucrose solution is an example of sugar solution. Details about a solution can be found below.
What is a solution?A solution is a mixture, which may be liquid, gas or solid, formed by dissolving one or more substances.
A solution is formed when a solute substance dissolved in a solvent.
For example; sucrose is a solute molecule that dissolves in water to form a sucrose solution.
It is important to note that sucrose solution is hypertonic to water i.e. it is a more concentrated solution. There is a net movement of water molecules, by osmosis from the water outside to the sucrose solution.
Learn more about solution at: https://brainly.com/question/3850162
#SPJ1
In order for photosynthesis to take place, energy in the form of ______ is required.
A. sound
B. light
C. electricity
D. kinetic
Answer:
B. Light
Explanation:
Light is converted into energy during photosynthesis
Hi can anyone answer these two distance and time questions
How do waves travel through space?
Explanation:
Electromagnetic waves are waves which can travel through the vacuum of outer space. Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component.
Why do helium balloons pop in a hot car?
Answer: because helium molecules get bigger when they heat up, so if your balloons keep getting hotter, they will eventually pop.
Explanation:hope these gave u a clue and have a wonderful Christmas break ❄️
Explanation:
Because helium molecules grow bigger as they are heated up and eventually they popped out
3 A 60.00 g sample of tetraethyl lead, a gasoline additive, is found to contain 38.43 g lead, 17.83 g carbon, and 3.74 g hydrogen. Find its empirical formula.
Answer:
The empirical formula is PbC₈H₂₀
Explanation:
To determine the empyrical formula, we need to determine the % of each element:
(38.43g / 60 g ). 100 = 64.05 % of Lead
(17.83 g / 60 g) . 100 = 29.72 % of Carbon
(3.74 g / 60 g) . 100 = 6.23 % of H
Now we divide by the atomic mass:
64.05 / 207.2 = 0.309
29.72 / 12 = 2.48
6.23 / 1 = 6.23
We pick the lowest value and we divide again, with this number
0.309 / 0.309 = 1 Pb
2.48 / 0.309 = 8 C
6.23 / 0.309 = 20 H
PbC₈H₂₀
Find the product 78.3 times 0.45
Please help :(
Answer:
35.235
Explanation:
I plugged 78.3x0.45 it into a calculator
6. Which part leads the blood to the heart?
10 points
a. capillaries
b. veins
O c. arteries
d. blood vessels
Answer:
Your answer should be D
5gm of hydrogen diffused through a porus membrane
in 30 minutes. Find the time required to diffuse
the some amount of so2 gas at identhal conditions.
169.71 minutes
Further explanationGiven
Rate of diffused of Hydrogen=5 gm/30 min
Required
The time required for SO₂
Solution
Graham's law: the rate of effusion of a gas is inversely proportional to the square root of its molar masses or
the effusion rates of two gases = the square root of the inverse of their molar masses:
[tex]\tt \dfrac{r_1}{r_2}=\sqrt{\dfrac{M_2}{M_1} }[/tex]
r₁=5gm/30 min
M₁=molar weight of H₂-hydrogen= 2 g/mol
M₂=molar weight of SO₂-sulfur dioxide= 64 g/mol
[tex]\tt \dfrac{5/30}{r_2}=\sqrt{\dfrac{64}{2} }\\\\\dfrac{5/30}{r_2}=4\sqrt{2}\\\\\dfrac{5}{30}=r_2.4\sqrt{2}\\\\r_2=\dfrac{5}{30\times 4\sqrt{2} }=\dfrac{\sqrt{2} }{48}[/tex]
the time required (for the same amount=5 gm) :
[tex]\tt \dfrac{5}{x}=\dfrac{\sqrt{2} }{48}\rightarrow x=120\sqrt{2}=169.71 minute[/tex]
When a car burns gas most of the energy is lost as heat. This inefficiency of energy transfer is an example of which law of energy?
A. second
B. fourth
C. first
D. third
Answer:
C) first
Explanation:
You have 0.21 moles of Al how many atoms do you have
Number of atoms : 1.26 x 10²³
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
0.21 moles of Al, so n = 0.21
Number of atoms :
[tex]\tt N=0.21\times 6.02\times 10^{23}\\\\N=1.26\times 10^{23}[/tex]
Activity
solve the problems below to practice what you have learned. Remember to use the formula for a heat transferred: Q=mC(T: - T:).
Part A
The specific heat of lead is 0.129 yg°C. Find the amount of heat transferred to lead when 355 grams are heated from 95°C to 140°C.
BIŲ x
Font Sizes
Characters used: 15000
Answer:
2060.775 J
Explanation:
From the question given above, we obtained the following data:
Specific heat capacity (C) = 0.129 J/g°C
Mass (m) = 355 g
Initial temperature (Tᵢ) = 95 °C
Final temperature (Tբ) = 140 °C
Heat (Q) tranfered =?
We can calculate the amount of heat transferred by using the following formula:
Q = mC(Tբ – Tᵢ)
Q = 355 × 0.129 (140 – 95)
Q = 45.795 × 45
Q = 2060.775 J
Thus, 2060.775 J of energy was transferred.
Answer:
2060.775 Joules
Explanation:
what major gases are absorb by the ocean
A) oxygen and nitrogen
B) oxygen and hydrogen
C) carbon dioxide and hydrogen
D) oxygen and carbon dioxide
Answer:
C) carbon dioxide and hydrigen
