Answer:
The correct answer is 281.39 grams.
Explanation:
To arrive at this answer you must first keep in mind the basic equation:
<em>Q = m*Cp* ΔT</em>
Now, in order to calculate the necessary aluminum mass that absorbs 2138 J when passing from 14.83 to 23.31 ° C you must "clear" <em>m</em> of the previous equation.
This means, leave only the mass on one side of the equation, and "pass" <em>Cp</em> and <em>ΔT</em> to the other side dividing <em>Q</em>. This would look like this:
m= Q/ (Cp*ΔT)
Then, <u>you need the value of specific heat of aluminum</u> in the correct units, that is J / g ° C, the approximate value is 0.896.
ΔT is calculated by doing the mathematical operation:
23.31 °C - 14.83 °C = 8.48 °C
<em>
Finally, the values of: Q (data provided in joules), Cp (J / g ° C) and ΔT (calculated in ° C) are replaced in the last equation and the mass (in grams) is calculated resulting in 281.39 grams.</em>
They are tetrahedral in shape
they carbon atom share all four of its outer electrons with other carbon atoms to form 3D shape
SI unit- Quantity
second- time
kilogram- mass
kelvin- temperature
ampere- electric current
S.I. Unit of time is second.
S.I. Unit of mass is kilogram.
S.I. Unit of temperature is kelvin.
S.I. Unit of electric current is ampere.
So match will be as follows:
second- time
kilogram- mass
kelvin- temperature
ampere- electric current
D is incorrect it is not a compound.
