what energy is watching tv
1.thermal
2.sound
3.light
4.electrical
5.mechanical
Answer:
4. electrical
Explanation:
The answer is electrical let me know if it's right
If 0.959J of heat is added to 0.88g of water, how much will its temperature increase
Answer:
0.260 Celsius
Explanation:
q =c x m x (T2-T1)
c - specific heat of water 4.186 J/g.C
T2-T1 = q /(c x m) = 0.959 /(4.186 x 0.88) = 0.959/3.68 =0.260 C
ethyne gas is passed into ammonical silver nitrate solution?
Answer:
When acetylene gas is passed over ammoniacal silver nitrate soln gives white ppt of disilveracetylide is formed. - When acetylene is passed over ammoniacal silver nitrate solution, white ppt of disilveracetylide is formed.
A sample of nitrogen gas has a temperature of 22.7oC when the volume of the container is 12.2L and it is under 150.4kPa of pressure. What temperature, in Kelvin, would the gas need to be in order to occupy a 9.7L container at 101.3kPa? Show all your work and round your answer to the hundredths place.
22.7 degrees Celsius = 22.7 + 273 = 295.7 K
[tex]\frac{(12.2)(150.4)}{295.7}=\frac{(9.7)(101.3)}{T_{2}} \\ \\ \frac{295.7}{(12.2)(150.4)}=\frac{T_{2}}{(9.7)(101.3)} \\ \\ T_{2}=\frac{(295.7)(9.7)(101.3)}{(12.2)(150.4)} \approx \boxed{158.35 \text{ K}}[/tex]
Calculate the number of moles of solute in 27.55 mL of 0.1185 M K2Cr2O7(aq).
Answer:
0.01185M = moles/0.02755L
0.02755*0.01185=0.00032647
Explanation:
What most likely accounts for the difference between curve A and curve B on
the energy diagram?
A. The reaction described by curve B is under greater pressure.
B. The reaction described by curve B is at a different temperature.
C. The reaction described by curve B has higher reactant
concentrations.
D. The reaction described by curve B is occurring with a catalyst.
Answer:
D
Explanation:
Ap3x
The accounts for the difference between curve A and curve B on the energy diagram is the reaction described by curve B is occurring with a catalyst. Therefore, option D is correct.
What is an energy diagram ?An energy profile is a theoretical representation of a chemical reaction or process as a single energetic pathway that transforms reactants into products.
The amount of relative potential energy in each step of a reaction is depicted by an energy diagram. Reactants, transition states, and products are typically depicted on energy diagrams. It may also include intermediates and activation energy, depending on the reaction.
An energy diagram depicts how an object's potential energy varies with position and provides information about the object's motion.The potential energy curve depicts the amount of potential energy that the boulder has at each position.
Thus, option D is correct.
To learn more about an energy diagram, follow the link;
https://brainly.com/question/15751837
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What is the structural equation for aspirin esterificarion
Answer:
The synthesis of aspirin is known in organic chemistry as an esterification reaction. This is a substitution reaction in which an alcohol (the –OH group in salicylic acid) reacts with acetic anhydride to form an ester, aspirin.
Explanation:
Why do convection currents matter in our lives today? How do they affect us?
Answer:
Convection currents are the result of differential heating. Lighter (less dense), warm material rises while heavier (more dense) cool material sinks. It is this movement that creates circulation patterns known as convection currents in the atmosphere, in water, and in the mantle of Earth. These constantly circulating cells of hotter and cooler molten rock are thought to help heat the surface. Some geologists believe convection currents within the earth are a contributing cause of volcanoes, earthquakes, and continental drift.
Explanation:
Please help me with this
Answer:
C
Explanation:
Protons and neutrons!
Have a great day :))))
True or false. Compounds are two or more DIFFERENT elements.
A. True
B. False
Answer:
the answer is letter B,FALSE
a solution is prepared by dissolving 4.85 g of HCl into enough water to make 2.50 L of a solution
Answer:
0.0532 M
Explanation:
Just did the test :)
A gas that exerts a pressure of
15.6 psi in a container with a volume of
L will exert a pressure of
25.43 psi when transferred to a
container with a volume of 1.895 L.
Answer:
3.1L
Explanation: using Boyle's law p1v1=p2v2
p1=15.6,v1=?,p2=25.43,v2=1.895
manipulate the formula to favor so to find v1 the formula would be
p2v2/p1
25.43*1.895\15.6=3.1L
Which of the following chemical equations is balanced correctly?
Cl2 + NaI—> 2 NaCl + 12
B202 + 2C—>B4C +CO
C6H6 + 02–>2C02 + 3H20
CS2 + 3C12–>CCl4 +S2Cl2
draw the structure of carbon and diamond
Answer:
hiiiiiiiiiiiiiiiiiiiiiiiiii
4. How many molecules are in one mole of oxygen gas, 02?
Answer:
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
Explanation:
-hope it helps♡
Can someone please help me
Answer:
Potassium iodide increases the decomposition rate of hydrogen peroxide.
Explanation:
Potassium iodide increases the decomposition rate of hydrogen peroxide because potassium iodide act as a catalyst. A catalyst speed up the process of chemical reaction without reacting with the molecules present in reaction. If the potassium iodide is not present as a catalyst for the decomposition of hydrogen peroxide then the decomposition of hydrogen peroxide takes too much time because the catalyst is absent that speed up the reaction.
3. Copper (1) phosphate reacts with lithium chromate in a double displacement
reaction, as shown in the unbalanced equation:
Cu3PO4 + Li Cro. → LisPOA + Cu,Cros
B) How many grams of lithium phosphate can be made from reacting 25.0 mL of
1.5 M lithium chromate with excess copper (D) phosphate?
C) How many mL of 0.5 M copper (1) chromate will be formed from 500 mL of
3.0 M copper (1) phosphate?
what are the main forces that operate between nonpolar molecules
Answer:
Van der Waals forces
Explanation:
Answer:
Dispersion
Explanation:
They said it was the answer.
Which of the following is a standard state?
Answer:
Answer
Standard State Conditions are
- The standard state temperature is 25°C (298 K).
- The concentration of all solutions is 1 M (1 molar).
- All gases are at 1 atm pressure.
Therefore
- Solution at 1 atm - Not a standard state
- Liquid at 1 atm - Not a standard state
Explanation:
PLEASE HELP
CH4 + 2O2
Answer:
the answer of the question is =ch4+2o2
Which layer of the ocean can support organisms that photosynthesize?
Answer:
Epipelagic zone
Explanation:
The Epipelagic zone is the upper most layer of the ocean. It is the layer which receives maximum sunlight, because of availability of sunlight and nutrients like fresh oxygen and atmospheric carbon dioxide, this zone is suitable for active photosynthesis activity.
The order of the layers from the inside of the Earth outwards is:
(10 Points)
Mantle, crust, core
Core, mantle, crust
Core, crust, mantle
Mantle, core, crust
In the equation:
2H2 + O2 --> 2H2O
What mass of Hydrogen Gas will completely react with 4 moles of Oxygen gas
(Hint: going from moles to mass of another compound)
A)8 g
B)16 g
C)24 g
Answer:
B) 16 g
Explanation:
2H₂ + O₂ → 2H₂OFirst we convert 4 moles of O₂ into moles of H₂, using the stoichiometric coefficients of the balanced reaction:
4 mol O₂ * [tex]\frac{2molH_2}{1molO_2}[/tex] = 8 mol H₂Finally we convert 8 moles of H₂ into grams, using its molar mass:
8 mol H₂ * 2 g/mol = 16 gThus, the correct answer is option B).
What mass of carbon dioxide (CO2) is produced when 62.8g of methane (CH4) reacts with oxygen (O2)?
Answer:
Explanation:
Hello!
In this case, when methane is burnt in the presence of carbon dioxide, the following chemical reaction is carried out:
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
Thus, since there is a 1:2 mole ratio between methane and oxygen, we set up the following mathematical expression to obtain the produced mass of carbon dioxide as a result of the reaction:
[tex]m_{CO_2}=62.8gCH_4*\frac{1molCH_4}{16.05gCH_4}*\frac{1molCO_2}{1molCH_4} *\frac{44.01gCO_2}{1molCO_2} \\\\m_{CO_2}=172.2gCO_2[/tex]
Best regards!
The graph models the amount remaining, in milligrams, of a radioactive substance as a function of time, in years. Explain the meaning of the point ( 3 , 100 ) shown on the graph. Answer in complete sentences.
Answer:
Point (3, 100) shows that 3 years is the half-life and 100 mg is remaining of the radioactive substance.
Explanation:
From the diagram given above,
The original amount of the radioactive substance is 200 mg because at time 0 from the graph, this is the amount (i.e 200 mg) remaining.
At point (3, 100), we can see that 100 mg of radioactive material is remaining. This is exactly half the original amount.
Thus, point (3, 100) shows that 3 years is the half-life and 100 mg is remaining of the radioactive substance.
NOTE: Half-life is simply defined as the time taken for half the original amount of radioactive material to decay.
explain answer too, CHEM HELP
How does the Sun get energy?
Answer:
Nuclear fushion
Explanation:
The sun generates energy from a process called nuclear fusion. During nuclear fusion, the high pressure and temperature in the sun's core cause nuclei to separate from their electrons
Rank the following compounds in order of decreasing acid strength using periodic trends.Rank the acids from strongest to weakest. To rank items as equivalent, overlap them.
HI, HBr, MgH2, H2Se.
Explanation:
H2Se, HBr, MgH2, Hl
Because H2Se is stronger than Hl..
The rate constant of a reaction is 6.4 × 10−3 s−1 at 25°C, and the activation energy is 33.6 kJ/mol. What is k at 75°C? Enter your answer in scientific notation.
Answer:
k₂ = 5 x 10⁻² s⁻¹
Explanation:
Using the Clausis - Clapyron Equation ...
ln(k₁/k₂) = ΔH/R(T₁-T₂/T₁·T₂) => lnk₂ = lnk₁ + ΔH/R(T₁-T₂/T₁·T₂)
k₁ = 6.4 x 10⁻³s⁻¹
ΔH = 33.6 Kj/mole
R = 0.008314 Kj/mol·K
T₁ = 25°C = 298K
T₂ = 75°C = 348K
lnk₂ = ln(6.4 x 10⁻³s⁻¹) + (33.6kj/mol·K/0.008314Kj/mol·K)·[(348K - 298K)/(348K)(298K)] = -3.10s⁻¹
k₂ at 75°C = exp(-3.10) = 5 x 10⁻²s⁻¹ (faster k-value at higher temp)
An atom is to a molecule as
A.a nail is to a hammer
B. A brick is to a house
C. A house cat is to a lion
D. A sentence is to a word.
Answer:
it is B ^^ have a great day
Answer:
the correct answer is c a brick to a house
Explanation:
E