Answer:
The answer is 7.8 kJ / mol.
Explanation:
Energy = (number of methyl group) (Gauche interactions)(3.8kJ/mol per interaction)
= (2)(2)(3.8 kJ / mol)
= 15.2 kJ / mol.
The energy = (number of methyl group) - ( energy of gauche interactions)
= (23 kJ/mol) - 15.2 kJ/mol
= 7.8 kJ / mol.
E force needed to accelerate a 68 kilogram-skier at a rate of
1.2
m
s
2
is 81.6 Net forces.
Explanation:
Take the mass(68kg) and the acceleration of the skier(
1.2
m
s
2
) and multiply them together
Answer:
8977.7 kg/m^3
Explanation:
Volume of water displaced = 55 cm^3 = 55 x 10^-6 m^3
Reading of balance when block is immersed in water = 4.3 N
According to the Archimedes principle, when a body is immersed n a liquid partly or wholly, then there is a loss in the weight of body which is called upthrust or buoyant force. this buoyant force is equal to the weight of liquid displaced by the body.
Buoyant force = weight of the water displaced by the block
Buoyant force = Volume of water displaced x density of water x g
= 55 x 10^-6 x 1000 x .8 = 0.539 N
True weight of the body = Weight of body in water + buoyant force
m g = 4.3 + 0.539 = 4.839
m = 0.4937 kg
Density of block = mass of block / volume of block
= ![\frac{0.4937}{55\times10^{-6}}](https://tex.z-dn.net/?f=%5Cfrac%7B0.4937%7D%7B55%5Ctimes10%5E%7B-6%7D%7D)
Density of block = 8977.7 kg/m^3
The number of protons, electrons, and neutrons in the atom of cr-24 is 28, 24, and 24 respectively.
<h3>What is atom?</h3>
An atom is the smallest unit of matter, consisting of the positively charged nucleus and the electrons which move around it. The atom can not be divided further.
The atom of a matter is made by three elements-
- 1) Neutron-Neutron is the element of an atom, which has zero charge.
- 2) Proton-Proton is the element of an atom, which has a positive charge.
- 3) Electron-Electron is the element of an atom, which has a negative charge.
The atom of cr-24 has the atomic number 24. The atomic number of atom is equal to the number of proton and electron in an atom. Thus,
Now, if this atom has the mass number of 52 (most common). Then the number of neutron is,
![\rm Neutrons=Mass\; Number-Atomic\; Number\\\rm Neutrons=52-24\\\rm Neutrons=28](https://tex.z-dn.net/?f=%5Crm%20Neutrons%3DMass%5C%3B%20Number-Atomic%5C%3B%20Number%5C%5C%5Crm%20Neutrons%3D52-24%5C%5C%5Crm%20Neutrons%3D28)
Thus, the number of protons, electrons, and neutrons in the atom of cr-24 is 28, 24, and 24 respectively.
Learn more about the atom here;
brainly.com/question/17545314
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Answer:
E = -4000 N / C
Explanation:
The potential and electric field are related
V = - E s
E = - V / s
we reduce the magnitudes to the SI system
s = 4 mm (1 m / 1000 mm) = 0.004 m
we calculate
E = - 16 /0.004
E = -4000 N / C