Answer:
The temperature of the mixture is 60°C
Explanation:
We can write the energy of water as follows:
E = m×C×T
<em>Where E is energy in Joules, m is mass of water, C is specific heat of water = 4.184J/g°C and T is temperature</em>
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Replacing fot both samples:
E = 20g×4.184J/g°C×30°C
E = 2510.4J
E = 40g×4.184J/g°C×75°C
E = 12552J
The total energy of the mixture is 12552J + 2510.4J = 15062.4J
Mass = 60g:
15062.4J = 60g×4.184J/g°C×T
60°C = T
<h3>The temperature of the mixture is 60°C</h3>
Answer:
Subscripts are small numbers right next to the letters
B only plants and some prokaryotes have cell walls
Answer:
Option (A).
Explanation:
A). Structural formula
Structural formula of a chemical compound represents a graphic structure of a molecule.
B). Chemical formula
Chemical formula shows the chemical proportions of the atoms which constitute a molecule of the compound.
C). Space filling model
Space filling model is a 3-D molecular model in which atoms are represented by the spheres whose radii are proportional to the radii of the atoms and distances between the atoms are proportional to the distances between the atomic nuclei.
D). A ball and stick model
This model shows the 3-D positions of the atoms and the bonds between them.
In this model atoms are represented by the spheres and bonds connected by the sticks.
Therefore, model shown is STRUCTURAL FORMULA.
Option (A) is the answer.
