why unit of force is derived unit?
Answers
Answer:
Because it is the product of two more basic units, mass and acceleration. The calculation of force is as follows:
Force=mass*acceleration
Mass is a base unit, acceleration is a derived unit calculated as a function of length and time which are both base units.
Any unit definition that is a function of more basic units is considered a derived unit.
Related Questions
17 OT-
2021
Subject Chemistry Date
7 Evaluate and discuss how do you think
the Number of the Valence electrons
relates to con elements Chemical properties
show many Valence election are found
in the following Atoms.
Answers
calculate the mole in 4.5 molecules of carbon dioxide
Answers
Explanation:
Refer to pic...........
4.51 moles of carbon dioxide
Step by step explanation
To calculate the number of moles in 4.5 molecules of carbon dioxide, we need to use the Avogadro's number, which is the number of particles in one mole of a substance.
Avogadro's number (Nᴀ) is 6.022 x 10²³ particles per mole.
Therefore, we can calculate the number of moles of carbon dioxide as follows:
Number of moles = Number of particles / Avogadro's number
Number of particles of CO2 = 4.5 molecules x 6.022 x 10²³ particles per mole
= 2.711 x 10²⁴ particles
Number of moles of CO2 = 2.711 x 10²⁴ particles / 6.022 x 10²³ particles per mole
= 4.51 moles (rounded to two decimal places)
Therefore, 4.5 molecules of carbon dioxide is equal to 4.51 moles of carbon dioxide
would you expect the ph of .25 m acetic acid to be higher or lower than the ph of .25 m hydrochloric acid solution
Answers
The pH of a .25 M acetic acid solution would be higher than the pH of a .25 M hydrochloric acid solution. This is because acetic acid is a weak acid, meaning it only partially dissociates in water, while hydrochloric acid is a strong acid, meaning it completely dissociates in water. The pH of a weak acid solution is higher than the pH of a strong acid solution of the same concentration.
Based on the terms you provided, I'll compare the pH of 0.25 M acetic acid and 0.25 M hydrochloric acid solutions.
Acetic acid is a weak acid, which means it doesn't completely dissociate in water, whereas hydrochloric acid is a strong acid, meaning it fully dissociates in water. When an acid dissociates, it releases hydrogen ions (H+) into the solution, which determines the pH.
Here's a step-by-step comparison:
1. A 0.25 M acetic acid solution will only partially dissociate, releasing fewer H+ ions into the solution.
2. A 0.25 M hydrochloric acid solution will completely dissociate, releasing more H+ ions into the solution.
Since the pH scale is logarithmic and inversely related to the concentration of H+ ions, a solution with fewer H+ ions will have a higher pH (less acidic) than a solution with more H+ ions.
Therefore, you would expect the pH of a 0.25 M acetic acid solution to be higher (less acidic) than the pH of a 0.25 M hydrochloric acid solution.
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An alkene X undergoes ozonolysis and gives two compounds Y and Z of molecular formula CHO. Y and Z. are functional isomers of each other Write the two-steps chemical equation for the conversion of X into Y and Z. 121 Write the structural formula of Y and 7. Why are they called functional isomers? [3] ili. What happens when hydrogen gas in the presence of nickel catalyst is passed over X? (1] TV. What is the application of ozonolysis in the organic reaction mechanism? 11 How can you prove chemically the compound X is unsaturated? [1]
Answers
The answers to the given questions are given below.
What is Ozonolysis ?A reaction done with Ozone to determine the position of C-C double bond in unsaturated Hydrocarbons.
It is given in the question
An alkene X undergoes ozonolysis and gives two compounds Y and Z of molecular formula CHO
Y and Z. are functional isomers of each other
The two-steps chemical equation for the conversion of X into Y and Z.\(\rm \\(CH_3)_2 -C= CH-CH_2-CH_3 + Zn - > CH_3 -CO-CH_3 + CH0-CH_2-CH_3\\\\Y \;is \;CH_3 -CO-CH_3 \\\\and \;Z \;is \;CHO-CH_2-CH_3\)
Here X is 2 methyl pent-2 eneOn reaction with ozone , ozonide is formed\(\rm Y \;is \;CH_3 -CO-CH_3 \\\\and \;Z \;is \;CHO-CH_2-CH_3\)
These are functional isomers as they have same molecular weight , but different functional groups.When hydrogen gas in the presence of nickel catalyst is passed over 2 methyl pent-2 eneA process called catalytic Hydrogenation will take place , and the alkene will get converted into alkane , 2-methyl pentaneThe ozonolysis process is useful in the pharmaceutical industry The unsaturation can be tested by bromine water testTo know more about Ozonolysis
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5) How many kilograms are in 185.6 lbs?
Answers
Answer:
84.1 Kilograms
Explanation:
what is the mass of 1.25 mol of zinc
Answers
Answer:
1 mole is equal to 1 moles Zinc, or 65.38 grams.
Explanation:
Could i have branliest, heart and 5 stars thanks!
Help! What will cause an increase in the weight of an object
Answers
David studied different metals of equal length by different amounts when heated equally. He took two bimetallic strips X and Y of identical dimensions and heated them at the same time. This is how they looked before and after heating.
A.Metal 1 expands the most.
b.Metal 2 expands the most.
c.Metal 2 and metal 3 have the same rate of expansion.
d.Metal 2 expands more than metal 1, but less than metal 3.
Answers
David studied different metals of equal length by different amounts when heated equally. Metal 2 and metal 3 have the same rate of expansion. The correct option is c.
What are metals?Metals are chemical elements, that can be identified by their luster, and malleable quality. They are highly reactive, and they can melt down to convert into other objects.
Here, three metals are heated, and we have to see which metal expands the most. As shown in the picture, we can see that metal 2 and 3 have the same amount of expansion.
Thus, the correct option is c.
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The male parent's alleles are written on the _____________ of a Punnett Square. *
a. bottom
b. left
c. right
d. top
Answers
Answer:
d
Explanation:
took the test 2021
_______ is the process in which light energy is transformed into food energy.
photosynthesis
life
biotic
abiotic
Answers
Answer:
Photosynthesis
Explanation:
Which pairs of angles in the figure below are vertical angles? Check all that apply.
Answers
I think it's option C and option D but if you can only choose one answer then I think it's option C
Answer:
It is option C
Explanation:
Can someone plz answer this ASAP
Answers
Answer:
Youngest - limestone with crinoid
2nd - shale with ammonite
3rd - sandstone with trilobite
oldest - conglomerate rock
Explanation:
Gasohol is a mixture of gasoline and ethanol (grain alcohol), C2H5OH. Calculate the maximum work that could be obtained at 25 °C and 1 atm by burning 1. 003 mol of C2H5OH. C2H5OH(1) + 302(g) 2C02(g) + 3H20(g) Maximum work = kJ Use correct number of significant digits;
Answers
Gasohol is a blend of gasoline and ethanol. To determine the maximum work that can be obtained by burning 1.003 mol of C2H5OH at 25°C and 1 atm, the Gibbs free energy equation can be utilized. What is Gibbs free energy equation? Gibbs free energy equation is a thermodynamic equation that quantifies the maximum quantity of work that may be obtained during a chemical reaction. T
he equation is as follows: ΔG = ΔH - TΔSThe values of ΔH and ΔS are calculated from thermodynamic tables or by calculating the enthalpy and entropy of the products and reactants, and the temperature, T, is usually specified in Kelvin. The change in Gibbs free energy, ΔG, is the maximum amount of energy that can be obtained from the reaction in the form of useful work if the reaction takes place at constant pressure and temperature. The reaction will proceed spontaneously if ΔG is negative. And if ΔG is positive, the reaction will not take place spontaneously. The solution to this problem is shown below:
First, let's figure out how much heat is produced when one mole of C2H5OH is burnt.ΔHrxn = [2(moles of CO2)(-393.5 kJ/mol) + 3(moles of H2O)(-285.8 kJ/mol)] - [(moles of C2H5OH)(-277.7 kJ/mol)]ΔHrxn = [2(2.006 mol)(-393.5 kJ/mol) + 3(3.009 mol)(-285.8 kJ/mol)] - [1.003 mol(-277.7 kJ/mol)]ΔHrxn = -2043.5 kJ/mol. Now, we'll figure out the entropy change for the reaction.ΔSrxn = [2(moles of CO2)(213.8 J/mol-K) + 3(moles of H2O)(69.9 J/mol-K)] - [(moles of C2H5OH)(160.7 J/mol-K)]ΔSrxn = [2(2.006 mol)(213.8 J/mol-K) + 3(3.009 mol)(69.9 J/mol-K)] - [1.003 mol(160.7 J/mol-K)]ΔSrxn = -104.3 J/mol-KThe temperature in Kelvin is 25°C.273 + 25 = 298 KΔG = ΔH - TΔSΔG = -2043.5 kJ/mol - (298 K)(-104.3 J/mol-K)/1000ΔG = -2032.6 kJ/mol. Therefore, the maximum work that can be obtained by burning 1.003 mol of C2H5OH is 2032.6 kJ/mol, which is the value of ΔG.
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Given that the initial rate constant is 0.0140s^{-1} at an initial temperature of 24 deg.C , what would the rate constant be at a temperature of 180 deg. C for the same reaction described in Part A? Part A: activation energy: 47.8kJ/mol
Answers
The rate constant can be calculated using the Arrhenius equation:
k = Ae^(-Ea/RT)
where k is the rate constant, A is the pre-exponential factor, Ea is the activation energy, R is the gas constant, T is the temperature in Kelvin.
We can rearrange the equation to solve for the new rate constant, k2, at 180 deg. C:
k2 = k1 * e^(ΔEa/RT)
where k1 is the initial rate constant and ΔEa = Ea2 - Ea1, is the change in activation energy between the two temperatures.
T1 = 24 + 273 = 297 K
T2 = 180 + 273 = 453 K
ΔEa = ΔT * R = (453 - 297) * R = 156 * R
k2 = 0.0140 * e^(47.8 * 10^3 / (8.31 * 453))
This equation can be used to calculate the new rate constant at 180 deg. C.
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Pleaseee helpppppppp
Answers
Answer:
Potassium
1s2 2s2 2p6 3s2 3p6 4s1
Explanation:
The atom having only one electron its outermost shell must belong to an element in group one of the periodic table.
Having noted that, we proceed to find out what element in group one that has the atom just described in the question.
That atom must belong to an element in the fourth period. The only group 1 element in the fourth period is potassium.
The electron configuration of potassium is;
1s2 2s2 2p6 3s2 3p6 4s1
Ethanol absorbs more energy than water because it has a lower heat capacity
True or false?
Answers
Owing to the fact that ethanol has a lower heat capacity than water then it certainly absorbs less energy than water.
What is heat capacity?The term heat capacity refers to the quantity of heat that can be required to raise the temperature of a substance by 1 K. We must note that the higher the heat capacity of a substance, the higher the quantity of heat that is required to raise the temperature of the substance by 1K.
Now, since ethanol has a lower heat capacity than water then it certainly absorbs less energy than water.
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What is standard temperature?
A
−273K
B
100K
C
273K
D
373K
Answers
The standard temperature is defined as 0°C or 273.15 K, and is commonly used in science and engineering as a reference point for measuring other temperatures. 373K is also a common temperature measurement that is equivalent to 100°C or the boiling point of water at standard atmospheric pressure.
The standard temperature is a temperature scale that is commonly used in science and engineering. It is defined as 0 degrees Celsius (°C) or 273.15 Kelvin (K). This temperature scale is also known as the International System of Units (SI) or the Celsius scale.
In order to convert from Celsius to Kelvin, you simply add 273.15 to the Celsius temperature. Therefore, if the standard temperature is 0°C, then it is equivalent to 273.15 K.
It is important to note that standard temperature can vary depending on the application. For example, in thermodynamics, the standard temperature is defined as 25°C or 298.15 K. This is often used as a reference point for measuring other temperatures in chemical reactions or processes.
In addition, 373K is a temperature measurement that is commonly used in science and engineering. It is equivalent to 100°C or the boiling point of water at standard atmospheric pressure. This temperature is often used as a reference point for high-temperature applications, such as materials science or combustion processes.
The standard temperature is defined as 0°C or 273.15 K, and is commonly used in science and engineering as a reference point for measuring other temperatures. 373K is also a common temperature measurement that is equivalent to 100°C or the boiling point of water at standard atmospheric pressure.
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Which substance is an example of a colloid
Answers
Hey,The Answer is Milk, Go for it!!
Which is a characteristic of the part of the atom marked
"A"?
It contains most of the mass.
It is negatively charged
It is mostly empty space.
It is composed of electrons.
Answers
Answer:
It contains most of the mass
Explanation:
that part A rigth
Answer:
A
Explanation:
A student works a problem and finds that a compound has 0.074 moles of carbon and 0.148 moles of oxygen. What is the empirical formula of the compound?
Answers
Given the number of moles of carbon in the compound is 0.074 and the number of moles of oxygen is 0.148 moles. Convert these numbers to whole number ratios we get the empirical formula of the compound as CO₂.
What is empirical formula ?The empirical formula of a compound is derived from the number of moles of the constituent elements of the compound. The mole ratio of the elements give the subscripts in the formula.
Given,
number of moles of carbon in the compound = 0.074 moles
number of moles of oxygen = 0.148 moles
mole ratio of C to O is 0.074 : 0.148.
Divide both numbers by 0.074 to get whole numbers. we will obtain 1:2.
Hence, carbon and oxygen are in the ratio of 1:2 and the formula of the compound is CO₂.
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A 0.65 l(v1) balloon is filled with helium to a pressure of 101.3 kpa (p1) if the pressure of the gas increases to 2 atm (p2),what is the new volume of the balloon (v2)
Answers
Dalton's law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the component gases
How do I calculate partial pressure?Partial pressures can be calculated in one of two ways: 1) To determine the individual pressure of each gas in a mixture, use PV = nRT. 2) Determine the proportion of pressure from the total pressure that may be assigned to each individual gas by using the mole fraction of each gas.
Pressure overall is 98.8 kPa. Each gas's partial pressure relates to how many moles of that gas there are in the combination. Therefore, the partial pressure of each gas is equal to (0.500/0.750) x 98.8 = 65.9 kPa for H2 (increased)
Because pressure and force are connected, you can determine one using the physics formula pressure = force/area if you know the other.
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PLS ANSWER QUICKLY
Directions: Determine whether the following chemical reactions are synthesis (S), decomposition (D), single replacement (SR), double replacement (DR), or combustion (C). 1. CO, → C + O2
2. NaCl + AgNO3 > NaNO, + AgCl
3. S + Cl2 → SCI,
4. BaCl, + 2NaOH 2NaCl + Ba(OH)2
5. C,H, + 50, -300, +41,0 CH3
6. Zn + CuSO4 → ZnSO4 + Cu
7. 2KI + Br, 2KBr + +
8. 3CaBr, + 2Na, P Ca P, +6NaBr : - 2
9. 2NaF → 2Na+ F
10. CH.0+ 02 →CO, + H2O
Answers
2. DR
3. SR
4. DR
5. C
6. SR
7. S
8. D
10. C
To determine the limiting reactant in a chemical reaction, one must know the:.
Answers
Answer:
The available amounts of each reactant
Explanation:
The limiting reactant is the reactant that will limit the equation.
For example, I have 2N2 and H2O. In this situation, H2O would be the limiting reactant since there is only one atom, while N2 has two atoms.
Think of it like you're making peanut butter and jelly. You have 50 cans of peanut butter and only 10 jelly. Which means you can only make sandwiches using 10 jars of jelly and 10 jars of peanut butter.
Which of the following equations best describes the energy at point C.
assuming energy is conserved?
OA. PEA = KEC
O B. PEA = KEc+PEC
OC. PER = KEc+ PEC
OD. PEB = PEC
Answers
Answer:
B. PEA = KEC. +PEC
Explanation:
From the figure it is clear that there is interconversion between potential energy ( PE ) and kinetic energy ( KE ) , so that total mechanical energy is conserved .
At A only potential energy exists . Kinetic energy is zero .
At B only kinetic energy exists . Potential energy is zero .
At C both potential and kinetic energy exist .
So Potential energy at A is equal to potential energy at C and kinetic energy at C
Ie , PEA = KEC + PEC .
Option B is correct .
ACELLUS LAB-ACID BASE TITRATION
a student overshot the equivalence point when he was using NaOh to determine the concentration of an unknown acid, HA. What ions are present in the purple solution in the flask?
Answers
Answer: A-, NA+ And OH-
Explanation: Thank me later
Which will most likely happen to her soup?
Carlotta adds too much salt to her soup. She recalls that
evaporation can be used to separate salt from salt water,
so she plans to leave the soup on the stove on low heat
until the soup is less salty.
O The soup will become saltier because evaporation
removes the water and leaves the salt behind.
O The procedure will make the soup less salty because
the salt will evaporate and leave the pot.
The saltiness of the soup will not change because
both salt and water will evaporate.
O The heat will cause the soup to become more salty
because more salt dissolves in hotter water.
Answers
Answer: A! The soup will become saltier because evaporation removes the water and leaves the salt behind.
Explanation:
Just finished the test and got a 90%! <3
Answer:
A
Explanation:
Atoms of an element, X, have the electronic configuration shown below.
The compound most likely formed with magnesium, Mg, is:
(A) MgX
(B) Mg2X
(C) MgX2
(D) Mg3X2
Answers
The compound most likely formed with magnesium, Mg, is MgX . The correct option is (A) MgX.
The electronic configuration of the element, X is 2,8,7. Since X is located in group 7 of the periodic table, it has 7 electrons in its valence shell. In order to obtain a stable configuration, the atom can either gain one electron to fill the 3rd energy level completely or lose seven electrons to completely empty the 2nd energy level, which is easier. The resulting ion, X-, would have a stable electronic configuration of 2,8. Hence, the compound most likely formed with magnesium, Mg, is MgX .The correct option is (A) MgX.
Explanation: Magnesium is located in group 2 of the periodic table and has two valence electrons in its outermost shell. It loses these two electrons to form Mg2+ ions with stable electronic configurations of 2,8. On the other hand, element X gains an electron to form X- ions with stable electronic configurations of 2,8.The combination of Mg2+ and X- ions results in the formation of the compound MgX with a neutral charge.
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Lewis acid-base concept have the following characteristics except:
A. formation of an adduct
B. formation of a coordinate covalent bond
C. donation and acceptance of an electron pair
D. donation and acceptance of a proton
Answers
Answer:
Option A) Formation of an adduct.
Explanation:
Lewis acid-base concept have the following characteristics except? Option A. Have a great day .
The Lewis acid -base concepts states that acid are electron acceptors and bases are electron donors. Hence, this concept is based on the donation and acceptance of electron pair. Thus, option C is correct.
What is Lewis acid -base concept ?According to Lewis concept of acids and bases acids are substances tends to accepts electrons and bases are electron donors. Therefore, Lewis acids are electron deficient or electrophiles.
Similarly Lewis bases are electron rich or nucleophiles. For example BF₃ is a Lewis acid and NH₃ is a Lewis base. Hence, BF₃ can accept electron from the lone pair of nitrogen from the Lewis base NH₃. and forms the acid-base pair NH₃ - BF₃.
Lewis acid- base concepts thus states the donation and acceptance of an electron pair. Hence, option C is correct.
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How many grams of sodium hydroxide are in 2.5 liters of a 4 M solution?
Answers
A new element, Thorsonium, has two isotopes. Thorsonium isotopes have a mass of 255 amu and 257 amu. Given the average atomic mass of Thorsonium is 255.65 amu, calculate the percent abundance for each Thorsonium isotope.
Answers
Answer:
255 amu has relative abundance 67.5% and 257 has relative abundance 32.5%
Explanation:
Average atomic mass =sum of product of atomic mass and relative abundance all divided by hundred or total abundance