Answer:
B)
Explanation:
because the wind is moving the sand and the rain moves the soil
16) weathering and erosion
A reversible reaction is a reaction that takes place in the ___________________
. If the reaction were to _________________, the rate of the forward reaction would equal that of the reverse reaction.
Answer:
A reversible Reaction is a reaction that takes place in the (Reactants)
If the reaction Were to (Equal), the rate of the forward reaction would equal that of the reverse reaction
Explanation:
A reversible reaction is a reaction that takes place in the both direction.
If the reaction were to equilibrium, the rate of the forward reaction would equal that of the reverse reaction.
What is reversible reaction?A reversible reaction can be identified as one in which the reactants, , as well as products, react together to return the reactants to their previous form.
What is equilibrium?The phase of chemical equilibrium occurs if both reactants, as well as products, products, are occupied in concentrations that do not alter with time.
Therefore, A reversible reaction is a reaction that takes place in the both direction. If the reaction were to equilibrium, the rate of the forward reaction would equal that of the reverse reaction.
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which scientist made the most important discovery concerning indemnifying the sun as a star
Answer: Isaac Newton
Isaac Newton, an English scientist, lived from 1642 to 1727. In 1665 he realized that it was gravity that held the solar system together.
Explanation:
BUT YOULL NEVER BE ALONEEEE
ILL BE WITH YOU FROM DUSK UNTIL DAWWWNNNNN
ILL BE WITH YOU FROM DUSK TILL DAWN
ILL HOLD U WHEN THINGS GO WRONG
ILL BE WITH U FROM DUSK TIL DAWN
ILL BE WITH U FROM DUSK TIL DAWNNNNN
Describe what happens inside a CD
player when you listen to an audio CD.
The thing that happens inside a CD player when you listen to an audio CD is that laser beam turns on and scans along a track with the photocell from the CD's center.
What are semiconductors?The electrical conductivity of a semiconductor material is between that of a conductor, such as metallic copper, and that of an insulator, such as glass.
A small photoelectric cell and a smaller laser beam (called a semiconductor diode laser) are found inside your CD player (an electronic light detector). When you hit play, the disc is rotated at a high speed by an electric motor (not visible in this figure) (up to 500rpm).
The laser beam turns on and scans along a track with the photocell from the CD's center to its edge (in the opposite way to an LP record). As the laser/photocell scans from the center to the periphery of the disc, the motor gradually slows it down (as the track number increases, in other words).
Hence laser beam turns on and scans along a track with the photocell from the CD's center.
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Tori completed an experiment to see what happens to differently charged objects when they come close to each other. Based on the observations that she collected, her teacher told her there is an error in her table. How can Tori correct her table?
A table with two columns. The first row is the headings of the table. The first column is labeled electrically charged objects and the second column is labeled attract or repel. In the first column, second row, there is an image of a beach ball with a negative charge on it and a dress with a positive charge on it. In the second column, second row, is attract. In the first column, third row, there is an image of a t shirt with a negative charge on it and a beach ball with a negative charge on it. In the second column, third row, is attract. In the first column, fourth row, there is an image of a t shirt with a negative charge on it and a glove with a negative charge on it. In the second column, fourth row, there is repel. In the first column, fifth row, is an image of a chair with a positive charge on it and a dress with a positive charge on it. In the second column, the fifth row is attract.
Answer:
A negatively charged T-shirt and a negatively charged beach ball will repel each other, so Tori should change "attract" to "repel" for these objects.
Explanation:
According to the Bohr model, what period and group would the element be in on the Periodic Table?
Answer:
Group: 16 Period: 2
Explanation:
There are 8 protons, which determine that the element is Oxygen. Oxygen is in group 16 and Period 2.
1. Calculate the resistivity of the given material whose resistance is 2Ω, length and area of cross section are 15 cm and 25cm² respectedly
Answer:
0.033 Ω . m
Explanation:
This is a typical problem that can be solved with the resistivity formula.
ρ = R . A / l
where R is the resistance, A is the area and l, length of the object.
We have all the data in the statement but firstly, we need to convert the area and length in m² and m, respectively because units of ρ are Ω . m
15 cm . 1 m/100 cm = 0.15 m
25 cm² . 1m² / 10000 cm² = 0.0025 m²
We replace → R = 2Ω . (0.0025 m² / 0.15) ⇒ 0.033 Ω . m
A conductive object will be more or less resistant according to the resistivity, which increases with length and decreases with area. Furthermore, resistivity is also conditioned to temperature, where as T ° increases, resistivity increases too.
Liquid Mercury has a density of 13.55 g/cm3 at room temperature (20.0 ° C).
You are trying to design a container to hold a 3.40 X 104 mg sample of mercury.
This mercury expands at 1.11 μl (microliter) per degree it is heated.
What is the minimum volume ( in liters) of the container if you want the sample to be able to be heated to 200.0 ° C? (Assume that the sample starts at room temperature.)
If this was in a sealed tube with a diameter of 0.550 cm, how tall(in cm) would the tube need to be to hold the mercury through these temperature changes? [ V= π r2h (cylinder) ] Please show your work!
Answer:
A long glass tube with one end open and the other end sealed was completely filled with mercury, then it was stood on end with the open end in a container filled with mercury.
If the tube is relatively short, it will still be filled with mercury all the way to the top. If it's long enough, the column of mercury will not reach the top. The air pressure on the surface of the mercury pool that the tube sits in is what supports the mercury. When the weight of a 1 cm^2 column of mercury is greater than the air pressure per cm^2, it can't be supported by that pressure. The top of the tube will have an almost perfect vacuum, with only a tiny amount of mercury vapor in it.
The height of a column of water or mercury that can be supported by air pressure depends on, and is proportional to, the density of the water or mercury.
How you're supposed to get the answers depends on what units are used to define 1 bar of pressure. Your textbook or lecture notes should give you the value and units of a bar. If you're supposed to look it up, you'll find a variety of different combinations, including 750.06 mm of Hg or 1019.72cm of H 2 O. That would actually give you the answers directly.
750.06 m m ≈ 0.75 m of H g
1019.72 c m ≈ 10.20 m of water
If you're supposed to calculate everything, you'll need to use 1 bar = 1 x 105 N / m 2. Then you'll have to look up the g r a v i t a t i o n constant and calculate the weight of a column of mercury or water. Note that g rams and k i l o g r a m s are units of mass, not weight, which is a force. The unit of force in the m e t r i c system is the N e w t o n. This is confusing because we measure weight in pounds, which is a force. Most of the rest of the world measures "weight" in k i l o g r a m s, which is really mass.
How is 1 bar defined for you?
If it's m m H g, just multiply that by 13.6 to get the height for a column of water.
If it's a force per unit area:
We can calculate the force (weight) of H. g using the g r a v i t a t i o n constant and the given density, then go from there."
Explanation:
I do not own this information
Using the amount of each element you calculated in part A, calculate the ratios of the elements to each other to determine the empirical formula.
Select the correct answer from each drop-down menu to complete the empirical formula.
Answer:
C2H6O1
Explanation:
Divide the number of moles of each element by the smallest number of moles, which is 9.69 moles.
Divide the number of moles of carbon by 9.69:
19.3 mol/ 9.69 mol ≈ 2.
Divide the number of moles of hydrogen by 9.69:
57.5 mol/ 9.60 mol ≈ 6.
Divide the number of moles of oxygen by 9.69:
9.69 mol/ 9.69 mol = 1.
So, the empirical formula of the unknown compound is C2H6O.
What type of Star is this?
1. Main Sequence
2. Super Giant
3. Giant
4. White Dwarf
Answer:
#3
Explanation:
not sure but it's close to 5,100
Which expressions are equal to 675? 700 – 25 O 700 – 75 O 600 + 75 O 634 + 31 500 275
Answer:
30
Explanation:
Answer:
The first one, The third one.
700-25, 600+75!
Explanation:
I need filling the blank spots
Answer:
have you tried c
Explanation:
the chicken and I don't know if you can make it
What does the word photosynthesis mean?
PIC IS BELOW!
BCL PART
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10 of 25
Fill in the coefficients with the correct numbers to create a balanced equation,
Al + _ Brg _M1Brz
0 1,21
2,3,2
4,6,4
34,3
Answer:
im not sure sorry
Explanation:
What can describe the form of precipitation
Do you have a picture/answer choices?
Some forms of precipitation are rain, sleet, snow, and hail, if that's what you were asking for.
10. Which of these elements is the most electronetative?
(10 Points)
Nitrogen
Calcium
Bromine
O Aluminum
If A is the symbol for an element, which of the following is an isotope of 15
7 A?
Is A correct ??
Answer: No It's B
Explanation:
13 = 7 so 15 = ? b because 7 + 8 = 15
How many oxygen atoms are in diiodine heptoxide?
Answer:
there are seven oxygen atoms
Explanation:
look look at the prefix hept- to help you answer this question
What is the name for the layer of electrically charged particles that allows radio waves to travel across the country and which atmosphere layer is it found in?
Answer:
Electrons are the electrically charged particles u r looking for
someone help please????
Answer:
A
Explanation:
Your answer is A
Answer:
A is the answer
Explanation:
Give an example of an amorphous solid.... PLS HELP ON THIS
Macoy Inda
ns: Read and analyze each item carefully and choose and encircle the letter of the correct answ
Tven.
Which of the following is NOT a special product?
12x + 5)(2x - 5)
B. (m + 3) (m + 3)
(m. 5)(
m5)
D. (x-2)(x-2)(x-2)
What is the product of squaring the binomial (5x + 4)??
А. ЛОх2 + 16
B. 25x2 + 16
C. 25x2 + 40x + 16
D. 25x2 + 20x + 16
One of the factors of x2 + 2x – 15 is (x + 5). What is the other factor?
Arx+3)
B. (x-3)
C/(x-5)
D. (x + 5)
Which of the following gives a product of 9y2 – 16?
A. (3y + 4) (3y + 4)
B/(3y + 4) (3y - 4)
C. (3y-2)(3y - 8)
D. (3y + 2)(3y + 8)
Which of following is the product of (n-3) (n - 3)(n-3)?
. n3 – 27
B.n
3-9n2 + 27n + 27
C. n3 + 27
D. n3 + 9n2-27n - 27
Find the missing terms: (x + _) (x + _) = x2 + 18% + 81.
B. -9,-9
D. 9,9
C.) 4,4
The area of the square is t? – 18t + 81 square units. Which expression represents the ler
-4, -4
Answer:
? the question isn't clear
Explanation:
What is the balanced equation of Na2S+CuSO4=CuS+Na2SO4?
Using the average atomic masses given inside the front cover of this book, calculate the number of atoms present in each of the following sample. a. 1.50 g of silver, Ag
b. 0.0015 mole of copper, Cu
C. 0.0015 g of copper, Cu
d. 2.00 kg of magnesium, Mg
e. 2.34 oz of calcium, Ca
f. 2.34 g of calcium, Ca
g. 2.34 moles of calcium, Ca
Answer:
c. 0.0015 g of coopet, cu
Explanation:
The list shows five processes that occur during digestion.
1. Tearing
II. Grinding
III. Mixing
IV. Churning
V. Rolling
Where do these processes most likely occur?
A
in the mouth
B
in the esophagus
С
in the stomach
D
in the colon
1. Calculate the energy of interaction between a lithium ion and a magnesium ion at a distance of 4,55/10^-10m
what is the molecular formula if the emperical formula C2H5 and the molcuar molar mass is 58.14 g/mol0
Answer:
C4H10
Explanation:
Remark
Every periodic table is different. I'm going to use approximate numbers.
Emperical Formula Mass
2C = 2 * 12 = 24
H5 = 5 1 5
Emperical Formula Mass = 29
Solution
To get the molecular Molar Mass, you use
Molecular Molar Mass = number of mol of each constituent * empirical molar mass
Molecular mass = 58.14 rounded to 58
empirical mass = 29
moles = constitutent = ?
58 = 29 * mols constituent Divide by 29
2 = moles constituent
Answer
(C2H5)_2
C4H10
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Answer:
Time and Distance
Explanation:
The equation needed to calculate speed is distance ÷ time.
A 0.25 mol sample of neon gas at 18 °C and 0.799
atm is heated to 49 °C. The new gas pressure is 1.11
atm. What is the change in volume of the neon gas?
Answer: The change in volume is 1.52 L
Explanation:
According to ideal gas equation:
[tex]PV=nRT[/tex]
P = pressure of gas = 0.96 atm
V = Volume of gas = ?
n = number of moles
R = gas constant =[tex]0.0821Latm/Kmol[/tex]
T =temperature =[tex]18^0C=(18+273)K=291K[/tex]
[tex]V=\frac{nRT}{P}[/tex]
[tex]V=\frac{0.25mol\times 0.0820 L atm/K mol\times 291K}{0.799atm}=7.47L[/tex]
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 0.799 atm
[tex]P_2[/tex] = final pressure of gas = 1.11 atm
[tex]V_1[/tex] = initial volume of gas = 7.47 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]T_1[/tex] = initial temperature of gas = [tex]18^0C=(18+273)K=291K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]49^0C=(49+273)K=322K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{0.799\times 7.47}{291}=\frac{1.11\times V_2}{322}[/tex]
[tex]V_2=5.95L[/tex]
The change in volume = (7.47 - 5.95)L=1.52 L
The space occupied by the substance, solution or particle in a system is called volume. The change in volume of the neon gas is 1.52 L.
What is the ideal gas equation?The ideal gas equation is the equation that states the relation between the pressure, volume, temperature, moles and gas constant of the hypothetical gas.
The ideal gas equation of a hypothetical ideal gas can be given as,
[tex]\rm PV = nRT[/tex]
Where,
Pressure (P) of the gas = 0.96 atmThe volume of the gas = VNumber of moles (n) = 0.25 molGas constant (R) = 0.0821 Latm/ KmolTemperature (T) = 291 KFrom the above equation volume can be calculated as,
[tex]\begin{aligned} \rm V &= \rm \dfrac{nRT}{P}\\\\&= \dfrac{0.25 \times 0.0820 \times 291}{0.799}\\\\&= 7.47 \;\rm L\end{aligned}[/tex]
The combined gas equation can be shown as,
[tex]\rm \dfrac{P_{1}V_{1}}{T_{1}} = \dfrac{P_{2}V_{2}}{T_{2}}[/tex]
Where,
The initial pressure of the gas [tex]\rm (P_{1})[/tex] = 0.799 atmThe final pressure of the gas [tex]\rm (P_{2})[/tex] = 1.11 atmThe initial volume of gas [tex]\rm (V_{1})[/tex] = 7.47 LThe final volume of gas [tex]\rm (V_{2})[/tex] = ?The initial temperature of the gas [tex]\rm (T_{1})[/tex] = 291 KThe final temperature of the gas [tex]\rm (T_{2})[/tex] = 322 KSubstituting values in the above equation:
[tex]\begin{aligned}\dfrac{0.799 \times 7.47}{291} &= \rm \dfrac{1.11 \times V_{2}}{322}\\\\&= 5.95 \;\rm L\end{aligned}[/tex]
Volume change of the gas is, [tex](7.47 - 5.95)\;\rm L = 1.52\;\rm L[/tex]
Therefore the change in the volume of the neon gas is 1.52 L.
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please answer fast! Which of the following statements are false?
A: In a chemical change, atoms are rearranged to make new compounds.
B: The same element is present before and after a chemical change.
C: A physical change does not produce an entirely new substance.
D: A chemical property can be observed without changing the identity of the substance.
I believe it is C.
Hope this helps!
2. The following are representative particles of matter: which among them
represents a covalent compound?
A. atom
B. ion
C. molecule
D. particle unit