Now
[tex]\\ \rm\rightarrowtail Q=mc\delta T[/tex]
[tex]\\ \rm\rightarrowtail Q=20(40)(0.13)[/tex]
[tex]\\ \rm\rightarrowtail Q=800(0.13)[/tex]
[tex]\\ \rm\rightarrowtail Q=104J[/tex]
how many shared electrons are in the lewis structure of h2o2
Answer:
4 shared electrons
Explanation:
There are 4 shared electrons in the lewis structure of h2o2.
Which statement describes a seismic wave during an earthquake?
A.
The wave changes directions as it is pulled by gravity.
B.
The wave changes speed as it moves through different materials.
C.
The wave loses energy to the oceans when it comes in contact with the water.
D.
The wave reflects off the surrounding rocks as it moves through the outer core.
Based on their nature of waves, seismic waves changes speed as it moves through different materials.
What are seismic waves?Seismic waves are the waves that are produced and travel through the earth crust during an earthquake.
Seismic waves are often described as elastic waves which is the energy caused by a sudden breaking of rock within the earth's crust.
Seismic waves can travel at different speeds through different types of rock, bouncing back or changing direction.
Therefore, the correct statement which describes a seismic wave during an earthquake is that the wave changes speed as it moves through different materials.
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Hellpp I don’t understand this
Answer:
Can you repost this but flip it? It’s upside down rn
Explanation:
Thermal energy transfer lab report.
I need answers for questions 1-11.
If you cannot answer every question, that is ok. I just need the help. Here are the questions.
1. What is the purpose of the lab, the importance of the topic, and the question you are trying to answer?
2. What is your hypothesis (or hypotheses) for this experiment?
3. What methods are you using to test this (or each) hypothesis?
4. Locate the data and observations collected in your lab guide. What are the key results? How would you best summarize the data to relate your findings?
5. Do you have quantitative data (numerical results or calculations)? Do you have qualitative data (written observations and descriptions)? How can you organize this date for your report?
6. What do the key results indicate?
7. If you constructed graphs, what trends do they indicate in your data?
8. Were there any problems with the experiment or the methods? Did you have any surprising results?
9. What do the results tell you about your hypothesis(es)?
10. How do the data support your claim above?
11. If you could repeat the experiment and make it better, what would you do differently and why?
Thermal energy flows from hot to colder bodies and is determined by the process of calorimetry.
What is thermal energy?Thermal energy is the energy transfer process which occurs as a result temperature difference between two bodies.
Thermal energy flows from hot to colder bodies.
The quantity of Heat transfer is determined using a calorimeter.
The calorimeter works on the principle of conservation of energy. The principle of the calorimeter is stated as follows:
Heat lost = Heat gainedThe quantity of Heat, q = mass × specific heat capacity × temperature difference
Therefore, it can be concluded that thermal energy flows from hot to colder bodies.
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Answer:
I did this earlier, here's what I put.
Set up a cell that has a Mg electrode in a 1.0 M aqueous Mg2+ solution on the left side and a Cu electrode in a 1.0 M aqueous Cu2+ solution on the right side. Add the salt bridge. What is the balanced net ionic equation for this reaction? Include physical states.
The cell notation is; Cu^2+(aq)/Cu(s)//Mg(s)/Mg^2+(aq). The standard cell notation helps us to write the cell equation easily.
What is electrochemical cell?The electrochemical cell involves the transformation of chemical energy to electrical energy in an electrochemical cell. The two electrodes involved are the cathode and the anode.
In this case, the Mg is the anode and the Cu is the cathode hence the cell notation is; Cu^2+(aq)/Cu(s)//Mg(s)/Mg^2+(aq).
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Write the balanced NET ionic equation for the reaction when ZnI₂ and Pb(ClO₄)₂ are mixed in an aqueous solution.
Answer:
The total ionic equation is:
3 Na+ + PO4-3 + 3H+ + 3Cl- --> H3PO4 + 3Na+ + 3 Cl-
And the net ionic equation is:
3H+ + PO4-3 --> H3PO4
Which solution would have the highest concentration of [H+] ions?
O a solution with a pH of 8
O a solution with a pH of 12
O a solution with a pH of 10
a solution with a pH of 6
what makes the geometry of the tin(4) hydride to have a grater stability?
Explanation:
1. wet seving has been propsed as amethofolog to study aggregete stability aganist watet erosion
how do the parts of the liverworts above the soil get the minerals from the soil that are needed for plant processes
Answer:
I don't know but I'm curious now
1. How many joules of heat are necessary to melt 500 g of ice at its freezing point?
Answer: To melt 500 g of ice, 4000 joule of heat is required.
Explanation:
I love the helps
The energy required to melt one gram of ice is 334 J. Then the heat energy required to melt 500 g of ice into water is 1.6 × 10⁵ J.
What is heat of fusion ?The change in energy associated with a phase change or any chemical reaction is called enthalpy change. Then, heat energy required to melt or freeze the substance.
The heat of fusion of ice is 334 J/g. Therefore, the heat energy required to melt the 1 g of ice is 334 J. Now the equation being used to find the energy for m g of ice to melt is:
q = mHf.
Hf = 334J/g
m = 500 g
q = 500 × 334 J/g = 1.6 × 10⁵ J
Therefore, the heat energy needed to melt 500 g of ice to water is 1.6× 10⁵ J.
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What happens when an electron jumps energy from energy level 3 energy level 6 in an atom
Explanation:
high energy to Low energy
=the electron gains energy (K.E)
Answer this question lol
How many R.P.'s is equivalent to 0.780 g of Na₂CO₂?
Answer:
pbo2+cl-=clo-+pb(oh)2
Explanation:
balance by ion electron
What do ferns and gymnosperms have in common?They are all vascular plants.
Reproduction depends on birds, bees, and other animals.
They all produce seeds.
They depend on water for fertilization.
Answer:
They are all vascular plants.
Explanation:
Vascular plants, also known as tracheophytes, are highly advanced plant creatures with leaves, stems, and roots, as well as a vascular system made up of conducting vessels. Ferns are herbaceous, pteridophytic vascular plants that do not produce flowers or seeds. Gymnosperms are vascular plants that produce seeds but do not produce blooms. Because the seeds aren't covered or protected by an ovary, they can be seen on the plant's leaves or other components. Angiosperms are flowering plants containing seeds that develop inside the ovary, which develops and produces fruit.
Answer:
They all produce seeds
Explanation:
Which would lower the reaction rate?
A. Increasing the concentration of reactants.
B. Increasing the temperature of the system.
C. Raising the value of k.
D. Decreasing the temperature of the system.
Answer:
D. Decreasing the temperature of the system
Explanation:
5.26 KG of nitrogen monoxide and 7.64 milligrams of oxygen are combined with mass of nitrogen dioxide is formed
Answer:
NO + O2 NO2
Explanation:
How much energy is needed to completely boil a 5.05g sample of water?
Which color object would be the hottest? A violet object, a red object or a green object? Why?
Answer:
A Violet object
Explanation:
An Violet object attracts the heat after white objects, followed by orange, yellow, green, blue, indigo and violet, which attracts the most heat of any visible color other than black.
What is internal pressure?
Looking at the figure, the overall (SiO4) molecule, which forms the common mineral quartz, has a tetrahedral shape. It is probably a:
non-polar molecule
polar molecule
non-polar molecule because the chemical formula is in a tetrahedral form(O4) and the (Si) is in the centre. I hope this will help you
CH2CH3
CH3CH2-C-CH2CH3
CH3
what’s the IUPAC name?
What is the pOH of a
2.6 x 10-6 M H+ solution?
Explanation:
pOH=-log(2.6×10^(-6)
we get around 5.59
(using log)
what is the mass percentage of Li2CO3
Answer: its supposed to be 18.78%.
Explanation:
A 1.0 L solution AgNO3(ag) of and Pb(NO3)2(aq) has a Agconcentration of 0.020 M and a Pb2+ concentration of
0.0010 M. A 0.0010 mol sample of K2SO4(s) is added to the solution. Based on the information in the table above,
which of the following will occur? (Assume that the volume change of the solution is negligible.)
No precipitate will form.
(B) Only Ag2SO4(s) will precipitate.
(C) Only PbSO4(s) will precipitate.
(D) Both Ag2SO4(s) and PbSO4(s) will precipitate.
With an Ag concentration of 0.020 M and a Pb2+ concentration of
0.0010 M, Only PbSO4(s) will precipitate,
Option C is correct
What will precipitate?Generally, the equation for the Chemical Reaction is mathematically given as
Ag2SO4--->2Ag++SO4^{-2}
Where
PbSO4--->Pb2+ +SO4^{-2}
Therefore
Ag2SO4=[0.02^2[0.001]]
Ag2SO4=4*10^{-7}
and
PbSO4=[0.001^2[0.001]]
PbSO4=4*10^{-6}
In conclusion,Since PbSO4>>PAg2SO4, Only PbSO4(s) will precipitate.
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What are the elements names for C9H8O4
what is an important role that fish have in our universe?
Answer:
Answer:Fish play an important role in nutrient cycles because they store a large proportion of ecosystem nutrients in their tissues, transport nutrients farther than other aquatic animals and excrete nutrients in dissolved forms that are readily available to primary producers.
(07.01 MC)
A potential energy diagram is shown.
200
Potential Energy (kJ)
150
Reactants
100
Products
50
0
Reaction Pathway
What is the activation energy of this reaction? (5 points)
O 50 kJ
100 kJ
O 150 kJ
O 200 kJ
By subtracting the energy at the highest point of the diagram from the energy of the reactants we obtain the activation energy.
What is a potential energy diagram?A potential energy diagram is a diagram that shows the energy of the reactants as well as that of the products. Even though the diagram is not shown here but we know that the actvation energy is shown by the energy difference between the highest point on the reaction profile and the energy of the reactants.
Hence, by subtracting the energy at the highest point of the diagram from the energy of the reactants we obtain the activation energy.
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Answer:
The answer would be 100 kJ
Explanation:
I took the quiz
A 5.00 L flask at 25˚ C contains 0.200 mol of Cl2 . What is the pressure in the flask?
The pressure of a 5.00 L flask at 25˚ C that contains 0.200 mol of Cl2 is 0.98atm.
How to calculate pressure?The pressure of a gas can be calculated by using the following expression:
PV = nRT
Where;
P = pressureV = volumen = number of molesR = gas law constantT = temperatureP × 5 = 0.2 × 0.0821 × 298
5P = 4.893
P = 4.893 ÷ 5
P = 0.98atm
Therefore, the pressure of a 5.00 L flask at 25˚ C that contains 0.200 mol of Cl2 is 0.98atm.
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Answer:
Your answer would be:
0.98atm.
Explanation:
Have a great rest of your day
#TheWizzer
The dark areas on the map show the distribution of coral reefs around the world. What explanation best
describes why the distribution of coral reefs is limited to the areas shown on the map? ( marine science)
- Competition for space is lowest in waters along the equator.
- Equatorial waters provide some of the clearest water for symbiotic algae to pro
pce energy,
- Predation is lowest in areas along the equator because of increased rates of decomposition.
- The corals need the strong water currents found here in order to find sufficient mates.
Answer:
I think is D not sure
Explanation:
In an ecosystem, the corals need the strong water currents found here in order to find sufficient mates.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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Suppose that a car's starter motor draws 221 A of current for 6.20 s to start the car. What mass of Pb is oxidized in the lead–acid battery to supply this much electricity?
1.47 grams
Actually, I figured it out., here is the answer in case anyone is wondering:
It has two electrons in the process and Q is 1370.2 (Q= I*T= 221*6.2=1370.2) this gets to 1370.2/192736 (the number on the denominator is due to that fact that there are two electrons involved) That equals 0.007 Mols, and then using the grams per mol from the periodic table for lead, we get that value is equal to 1.47 grams.
The lead acid battery produces energy by oxidation of lead. The amount of lead oxidized in this case is 1.47 g.
What is lead acid battery?The lead acid battery is the common accumulator that we have in use. It is made up of a cell that contains lead electrodes in an acid.
The oxidation of lead occurs according to thr equation;
Pb(s) ----> Pb^2+(aq) + 2e
If 207 g of Pb is oxidized by 2(96500)C
x g of lead is oxidized by (221 * 6.20) C
x = 207 g * (221 * 6.20) C/2(96500)C
x = 1.47 g
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