Answers
A) wave speed = frequency x wave length
B) Time period = 1/frequency
C) Power = work done/ time taken
D) Kinetic energy = 0.5 x mass x velocity^2
E) Ep = mass x gravitational field x height
F) Ee = 0.5 x spring constant x extension^2
Hope this helps!
Related Questions
Is the bonding in carbon tetrachloride, CCl4 covalent or ionic? Explain how you know.
Answers
Answer:
covalent
Explanation:
It is between two nonmetals so it is covalent. It would be ionic if it were between a metal and a nonmetal.
Carbon tetrachloride, CCl₄ is a colorless organic compound with a sweet smell and is used as a refrigeration fluid. The covalent bonding is seen in the carbon tetrachloride compound.
What is covalent bonding?Covalent bonding is the chemical interaction that has been constituted of electron sharing between the atoms of the elements in the molecule or the compound.
This type of chemical bonding is seen when the difference between the electronegativities between the elemental atom is very small to initiate the electron transfer.
In carbon tetrachloride, carbon has 4 valence electrons whereas chlorine has 1 valence electron in its outer shells. The four Cl shares their electrons with the carbon atom to complete their octet.
Therefore, carbon tetrachloride shows covalent bonding.
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can u help me with this
Answers
Answer:
c
Explanation:
the reason is because your a homosiejenenddj
When .080 moles of propane burn at STP, what volume of carbon dioxide is produced?
The answer is 5.4 L (I NEED THE STEPS)
Answers
The volume of carbon dioxide produced is : 5.4 L
Given data:
moles of propane = 0.080 moles
Determine the volume of Carbon dioxide producedThe chemical reaction
C₃H₈ + 5O₂ ---- > 3CO₂ + 4H₂O
From the reaction
I mole of C₃H₈ = 3CO₂
0.080 moles of C₃H₈ = 3 * 0.080 = 0.24
Applying the equation below to determine the volume of CO₂
Pv = nRT
= 0.24 * R * T
v = ( 0.24 * 8.314 * 273 ) / 1 atm
= 544.7 ml = 5.4 L
Hence we can conclude that The volume of carbon dioxide produced is : 5.4 L
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What is the difference between a heterogenous and a homogenous mixture?
Answers
There are two types of mixtures: heterogeneous and homogeneous. Heterogeneous mixtures have visually distinguishable components, while homogeneous mixtures appear uniform throughout. The most common type of homogenous mixture is a solution, which can be a solid, liquid, or gas.
Hope this helped :)
describe the arrangement of the 118 elements in the periodic table how is it arrange?
Answers
Consider the nuclear equation below.
Na-
22Ne +98
0
10
Which is the missing value that will balance the equation?
O-1
O 0
O +1
O +2
Answers
Answer:
+1
Explanation:
Which is the conjugate acid base pair in the following equation.
H 2 SO4+ H20 —> HSO 4 -1 + H3O+1
H2SO4 and HSO4-1
H2SO4-1 and H3O+1
H3O+1 and H2SO4
Answers
Answer:
the correct answer is H2SO4 and HSO4-41
Describe how you might prepare disodium phosphate given a solution of phosphoric acid, 0.500 molar and a solution of sodium hydroxide base, 0.500molar.
Answers
Explanation:
When 2 moles of sodium hydroxide (NaOH) reacts with 1 mole of phosphoric acid (H3PO4) it gives 1 moles disodium phosphate Na2HPO4 and 2 moles of water.
0.5 molar solution indicates half moles of molecules are present in per ltr solution.
to prepare disodium phosphate you need to dilute phosphoric acid solution to 0.25 molar and add equal quantity of 0.5 molar solution.
[tex]2 NaOH + H_3PO_4 \: \rightarrow \: Na_2HPO_4 + 2 H_2O[/tex]
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Hydrogen has a melting point of -259 °C, and a boiling point of -253 °C. Its density at liquid state is 0.07 g/cm³. What is the physical state of Hydrogen at -250 °C? Explain your answer.
Answers
Answer:
Explanation:
Remark
-250, if you can believe it, is actually warmer than - 253. At -250 the hydrogen has gone through a phase change (a phase change means that it has gone from a liquid to a gas).
From here on as far as you are concerned, the hydrogen will stay as a gas. Later on, if all other things remain constant, you will learn that hydrogen can do some very strange things.
the measured mass of a sample would have which units
Answers
Answer:
[tex]\longmapsto \: \frak[ hello \: mate ][/tex]
The measured mass of a sample would have unit as "Kilogram "
Before balancing this equation, how many oxygen atoms are present on the product side of the following equation:
Answers
Answer:
3
Explanation:
co2 has 2 and h2o has 1
product is right side
which of the following has the smallest radius? A, Mg B, Na+ C, Na D, Mg+
Answers
Answer:
Na+
Explanation:
it is least pull by the nuclear charge
Answer:
Na+
Explanation:
It is posetively charged and in the first column
Choose the answer that describes the hierarchy among these three body regions.
A. The oral region is part of the facial region, and the facial region is part of the cephalic region.
B. The cephalic region is part of the facial region, and the facial region is part of the oral region.
C. The cephalic region is part of the facial region, and the facial region is part of the manual region.
D. The oral region is part of the cephalic region, and the cephalic region is part of the facial region.
Answers
Answer:
letter: B
Explanation:
thats is the true answer.
pleas heart my heart my answer
The release of aluminium ions as a result of acid rain is less significant in areas containing limestone rock - why?
Answers
Answer:
As it flows through the soil, acidic rain water can leach aluminum from soil clay particles and then flow into streams and lakes. The more acid that is introduced to the ecosystem, the more aluminum is released. Some types of plants and animals are able to tolerate acidic waters and moderate amounts of aluminum
Explanation:
When a 21.2 mL sample of a 0.411 M aqueous hydrofluoric acid solution is titrated with a 0.371 M aqueous barium hydroxide solution, what is the pH after 17.6 mL of barium hydroxide have been added
Answers
For a 21.2 mL sample of a 0.411 M aqueous hydrofluoric acid solution, the pH after 17.6 mL of barium hydroxide has been added is mathematically given as
pH=3.332
What is the pH after 17.6 mL of barium hydroxide has been added?Generally, the equation for the mole of HF is mathematically given as
mole of HF=molarity*volume
Therefore
mole of HF=0.361*19.2
mole of HF=6.931mmol
The chemical equation
HF+kOH⇆KF+H2O
Therefore
pH=pKa+log(Kf/HF)
pH=3.15+log(6.931*53.6/53.6*4.558)
pH=3.332
In conclusion, The pH
pH=3.332
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4. Calculate the total amount of heat a beaker of water would absorb sitting in the sun. The water has a mass of 500g, a specific heat of 4.184 (J/gx°C), and had a change in temperature of 22 °C.
Answers
Answer:
46024 j or 46.024 kj
Explanation:
500 gm * 4.184 j/(gm-C) * 22 C = 46024 j
The heat energy absorbed by water of mass 500 g and specific heat capacity of 4.184 J/°Cg with a temperature rise to 22 degree celsius is 46024 J.
What is specific heat capacity?Specific heat capacity of a substance is the heat energy required to raise the temperature of that substance by one degree celsius per mole. It is an intensive property and does not dependent on the total amount if the substance.
Specific heat capacity of a substance is a constant and water have this value of 4.184 J/°Cg. The heat energy q absorbed or evolved from a system is related to the specific heat capacity C , mass M and temperature change ΔT occured on the system as in equation written below:
q = mC ΔT .
The heat energy of water of mass 500 g absorbed for a temperature change of 22 °C can be calculated as follows:
q = 500 g × 22 °C × 4.184 J/°Cg
= 46024 J.
Hence, the total heat of absorption of water for the given mass and temperature change is 46024 J.
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A fossil is 3 half-life old. Measured Uranium-235 has half-life of 704 million years. How many years old is this fossil?
Answers
Answer: Uranium is not a problem in this case, as its radioactivity is very low. This is due to the long half-life. How much uranium will decay per second with a half-life of 700 million years? This is a very insignificant figure.
What volume will 3.0 moles of O2 gas occupy at S.T.P?
Answers
Answer:
3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.
Explanation:
A certain orbital has four nodes in total. Which of the following could it be?
-5s
-5p
-5d
-5f
-all
Answers
Answer:
5p
Explanation:
We know
Number of Nodes =n-l
i)5s
n=5
l=0
Number of nodes=5-0=5
ii)5p
n=5
l=1
Number of nodes=5-1=4
Hence correct option is option b 5P
Atomic orbitals are the property that explains the position of the electron. 5p orbital has four nodes in total. Thus, option B is correct.
What are nodes?Nodes are the point in the orbit where the electron density is zero and is given by n-1.
In 5s the n = 5, l = 0 so, number of nodes = 5. In 5p, n = 5, l = 1, so nodes = 4. In 5d, n = 5, l = 2, so nodes = 3, and in 5f, n = 5, l = 3 so, nodes = 2.
Therefore, option b. 5p has four orbital nodes.
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Calculate the energy required to excite a hydrogen electron from level n=1 to level n=3.
Answers
Answer:
The energy required is 1.634×J, the wavelength is 1.215×m, and the kind of electromagnetic radiation is the ultraviolet radiation.
Explanation:
In the question above, the initial level = 1, and = 2. Then, we use Rydberg's equation to calculate the wavelength of the light absorbed by the atom during the transition.
_______________________ yield is another name for actual yield
Answers
The second name that can be used to describe actual yield is Theoretical yield is another name for the actual yield
What is actual YieldThe actual yield is the amount of product obtained from a chemical reaction and it is lesser or equal to the theoretical yield ( the amount of product that can be obtained from a reaction when all reactants are converted ).
Hence we can conclude that theoretical yield is another name for the actual yield.
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Man is circled here in blue in the Quaternary Period. Locate it. Compare the location of man to the entire history of the world (the beginning of the spiral at the bottom left). What do you notice about the amount of water vs the amount of land as you spiral upward? Why do you think that is? What do you notice about the complexity of life as you spiral upward? Why do you think that is?
Answers
Answer:The upward spiral theory of lifestyle change explains how positive affect can facilitate long-term adherence to positive health behaviors. The inner loop of this spiral model identifies nonconscious motives as a central mechanism of behavioral maintenance.
Explanation://
Which of the following conditions would lead to a small population size? a. a low birth to death ratio b. a high birth to death ratio c. immigration d. large number of resources Please select the best answer from the choices provided A B C D Mark this and return
Answers
Answer:
Choice A.
A low birth to death ratio
Explanation:
A low birth to death ratio means that people are dying faster than they are being born. This leads to a decreasing population size.
Answer:
It's A
Explanation:
Write an equation that represents the action in water of hypoiodous acid ( HOI ) as a Brønsted–Lowry acid.
Answers
Taking into account the Brønsted-Lowry acid-base theory, the reaction between hypoiodous acid and water is:
HOI + H₂O ⇄ OI⁻ + H₃O⁺
Brønsted-Lowry acid-base theoryThe Brønsted-Lowry acid-base theory (or the Brønsted-Lowry theory) identifies acids and bases based on whether the species accepts or donates protons or H⁺.
According to this theory, acids are proton donors while bases are proton acceptors. That is, an acid is a species that donates an H⁺ proton while a base is a chemical species that accepts an H⁺ proton from the acid.
So, reactions between acids and bases are H⁺ proton transfer reactions, causing the acid to form its conjugate base and the base to form its conjugated acid by exchanging a proton.
Reaction between hypoiodous acid and waterIn this case, the reaction between hypoiodous acid and water is:
HOI + H₂O ⇄ OI⁻ + H₃O⁺
where HOI acts as an acid because it donates a potron, while water acts as a base because it accepts the proton donated by HOI.
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Consider these equations: 2S(s)+3O2(g)→2SO3(g) , ΔH=−792kJ 2S(s)+2O2(g)→2SO2(g) , ΔH=−594kJ 2SO2(g)+O2(g)→2SO3(g) , ΔH=? What is the missing ΔH ? −294kJ −198kJ +198kJ +294kJ
Answers
Hess law can help us to obtain the enthalpy of a series of reactions by summation. The missing enthalpy of this reaction is −198kJ.
What is Hess law?According to the Hess law of constant heat summation, the enthalpy of a sequence of reactions can be obtained as the sum of the enthalpies of all the reactions.
Now looking at all the reavtion written here in order to obtain the missing enthalpy, we conclude that the missing enthalpy is −198kJ.
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2SO2 (g) + O2 (g)→2SO3 (g), ΔH = −198 kJ.
what is the pH of a solution that has a [H+]=1.75x10^-11
Answers
[tex]pH = - \log[\text{H}^{+}] = -\log \left(1.75 \times 10^{-11} \right) = 10.757[/tex]
What do these 2 changes have in common?
Both are only physical changes.
Both are caused by heating.
Both are chemical changes.
Both are caused by cooling.
Answers
Answer:
Both are caused by heating. Both are Chemical changes.
Explanation:
Water evaporates from the Sun's heat and is transformed into a gas. Sediment is the particles of an object. When heat hits it, it starts breaking up, or in dry cases, heating and cracking.
Which statement about geologic times are true? ~Pick multiple answers~
Answers
Answer:
the correct answers are A,D,E, and G
Explanation:
When you exercise strenuously, your body produces excess heat. Describe what your body does to help prevent your temperature from rising excessively and
explain why your body's response effective.
Answers
Answer:
Your body can cool itself by sweating. When sweat evaporates, it lowers your temperature
Explanation:
Can I get answer to both of those questions
Answers
pH = -log(3.4x10^-2)
pH = 1.5
2. As a solution becomes more basic, [H3O+] decreases while [OH-] increases.
