A vase with a mass of 0.800 kilograms falls from a height of 0.750 meters to a position of 0.500 meters above the floor. Ignoring frictional effects, the kinetic energy at the 0.500 position is _____.
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Answer:
The kinetic energy at the 0.500 position is 1.96 J.
Explanation:
Mass of the vase = 0.800 kg
Height from where vase fallen = 0.750 m
Potential energy of vase at 0.750 m:
Kinetic energy of the vase at the point just before it was about to fell:
(absence of motion)
P.E + K.E = 5.88 J + 0 J = 5.88 Joules
Potential energy of vase at 0.500 m:P.E'
Kinetic energy of the vase at the point 0.500 m above the floor: K.E'
As we know, that sum of P.E and K.E remains constant.;
P.E' + K.E' = 3.92 J + K.E' = 5.88 J
K.E' = 5.88 J - 3.92 J = 1.96 J
The kinetic energy at the 0.500 position is 1.96 J.
Answer: The kinetic energy of vase at 0.500 m position is 1.96 J
Explanation:
Law of conservation of energy states that energy can neither be created nor be destroyed but it can only be transformed from one form to another form.
Here, the potential energy of the vase is getting converted into kinetic energy of the vase
So, calculating the potential energy of vase, we use the equation:
P = mgh
where,
m = mass of vase = 0.800 kg
g = acceleration due to gravity =
h = height of vase = (0.750 - 0.500) m = 0.250 m
Putting values in above equation, we get:
At 0.500 m, the potential energy gets converted to kinetic energy.
Kinetic energy of the vase = 1.96 J
Hence, the kinetic energy of vase at 0.500 m position is 1.96 J
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Answers
Answer : The correct formula of the given compound will be,
Explanation :
Calcium chloride is an ionic compound because calcium element is a metal and chloride element is a non-metal. The bond formed between a metal and a non-metal is always ionic in nature.
The nomenclature of ionic compounds is given by:
1. Positive ion is written first.
2. The negative ion is written next and a suffix is added at the end of the negative ion. The suffix written is '-ide'.
The charge on calcium is (+2) and the the charge on chloride is (-1). The charges are not balanced. Thus they combine and their charges are exchanged and written in simplest whole number ratios to give neutral .
Hence, the formula of the compound calcium chloride will be
Answers
Look, this shouldn't be that hard. As long as you know the symbol for each element, you just put a subscript to indicate how many there are in each compound.
For the second row, there is one C and 4 H's. That's , or methane.
For the third row, there is one Si and 2 O's. That's , or common glass/quartz.
used?
Answers
If there are three methyl groups on the same carbon, the prefix used is methyl.
What is methyl group?
A molecule called a methyl group, which is a member of the chemical family known as the alkyl group, is made up of one carbon atom surrounded by three hydrogen atoms.
A substituent with a trisubstituted second-to-last carbon is identified by the prefix "neo-" (has three methyl groups attached to it).
The molecule comes before a name prefix. The quantity of carbon atoms determines the prefix of the molecule's name. For instance, the prefix hex- might be used to name a chain of six carbon atoms.
The name's suffix is a finishing touch that specifies the kinds of chemical bonds that make up the molecule.
Therefore, the prefix used is methyl when there are three methyl groups on a single carbon.
To learn more about methyl group, refer to the link:
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Answer:
tri
Explanation:
1-nothing
2-di
3-tri
- Hope that helps! Please let me know if you need further explanation.
IE1(Rb) = 397.5
BE(Cl2) = 226
deltaHf(RbCl) = -431
Electron Affinity Cl = -332
a. -53.7
b. +53.7
C. -695
d. -808
e. +808
Answers
Answer:
Option C
Explanation:
The chemical reactions which are involved while solving this problem is there in the file attached and each chemical reaction is represented by a certain equation number
Lattice energy for rubidium chloride ( RbCl) is represented by the equation 6
Equation 1 represents the change in enthalpy for formation of RbCl
Equation 2 represents the sublimation reaction of rubidium
Equation 3 represents the ionization enthalpy of rubidium
Equation 4 represents the enthalpy of atomization of chlorine which means it describes the bond enthalpy of Cl2 molecule
Equation 5 represents the electron affinity of chlorine
To find the lattice energy for RbCl we have to use all the equations from 1 to 5 so that at last we get the equation 6
We have to perform operations such as
Equation 1 - equation 2 - equation 3 - equation 4 - equation 5
By performing these operations the intermediate compounds gets cancelled and at last we get equation 6
So Equation 1 ≡ ΔH = -431 kJ/mol
Equation 2 ≡ Rb(s) ---> Rb(g) = 85.8 kJ/mol
Equation 3 ≡ IE1(Rb) = 397.5 kJ/mol
Equation 4 ≡ BE(Cl2) = 226 kJ/mol
Equation 5 ≡ Electron Affinity Cl = -332 kJ/mol
Value corresponding to the equation 6 will be the value of lattice energy of RbCl and the value is -695·3 kJ/mol
∴ Lattice energy for rubidium chloride is approximately -695 kJ/mol
Final answer:
The lattice energy for rubidium chloride (RbCl) is calculated by substituting the given values into the equation derived from Hess's Law. The calculated lattice energy is found to be -695 kJ/mol.
Explanation:
In this question, you are asked to select the lattice energy for rubidium chloride (RbCl). The lattice energy can be calculated using various given energies including enthalpy of formation (ΔHf), electron affinity (Cl), enthalpy of sublimation, ionization energy, and bond dissociation energy. Using Hess's Law, this can be summed up as:
ΔHf(RbCl) = [Sublimation Energy (Rb) + Ionization Energy (Rb) + 0.5 × Bond Energy (Cl₂) + Electron Affinity (Cl)] - Lattice Energy (RbCl)
By rearranging this formula, we find that the Lattice Energy (RbCl) = [Sublimation Energy (Rb) + Ionization Energy (Rb) + 0.5 × Bond Energy (Cl₂) + Electron Affinity (Cl)] - ΔHf(RbCl). Substituting in the given values, we find the lattice energy to be -695 kJ/mol. Therefore, the correct option is C. -695.
Learn more about Lattice Energy here:
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Answers
the cell theory states that all new cells come from other living cells, and it's true for both multicellular as well as unicellular organisms.unicellular organisms reproduce through asexual reproduction,There are different types of reproduction like binary fission, vegetative, budding, fragmentation etc reproduction in unicellular organisms, through that they directly divide into new similar cells.
whiltin multicellular organisms, reproduction takes place through sexual reproduction, where male and female gametes are formed in separate reproductive organs and get transferred to form an embryo.
so in nut cell in unicellular organisms there is no specific organs,that is responsible for reproduction, while in multicellular there coplex reproductive system