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Answer:</h3>
Change in temperature = 2.03°C, the temperature is increasing
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Explanation:</h3>
- To calculate the quantity of heat absorbed or released by a substance we multiply mass of the substance by it's specific heat capacity and the temperature change.
- Therefore, Quantity of heat, Q = mass × specific heat × change in temperature
In this case;
Mass of water = 30.0 g
Quantity of heat absorbed = 255 J
Specific heat capacity of water = 4.186 J/g°C
Rearranging the formula, Δt = Q ÷ mc
Δt = 255 J ÷ (4.186 J/g°C×30.0 g )
= 2.03 °C
The temperature change is 2.03°C, the temperature is therefore increasing.
They have thier own group because because they have traits or metals and nonmetals
Upthrust = loss in weight = 0.82 - 0.059 = 0.761 Kg
upthrust = weight of the displaced fluid = 0.79*Vg where Vg is the volume of the piece of wood
Therefore:
0.761 = 0.79 Vg
Vg = 0.96329
Density of wood (sg of wood) = mass / volume
density of wood = 0.82 / 0.96329 = 0.85
The statements which correctly describe the Cl-Cl bond is:
It is a sigma bond.
It is formed by overlap of two hybrid orbitals.
Explanation:
The 2 atoms of the chlorine atom are bonded by single bond by sharing of electrons as chlorine has 7 electrons in its outer shell.
1s22s2p63s23p5 configuration of each atom
A covalent bond is formed between the two chlorine atoms.
The electrons are shared by molecular orbitals by overlapping the orbital as each of the chlorine atom will try to complete its octet. The electrons from p orbitals are shared hence sigma bond.
There is no hybridization in Cl2 it only has only overlapping of electrons in p orbitals.
