In general, a scientific law is the description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it. The explanation of a phenomenon is called a scientific theory.
so the third one should be correct.
Mc (Moscovium) has atomic number is 115
D. Pressure vs. temperature
<u>Explanation:</u>
In physical chemistry, this diagram or graph is utilized to predict the conditions like volume, pressure and temperature at which thermodynamic- ally different phases like solid, gases and liquid occur and both states exist at equilibrium.
The simple phase diagrams are the pressure–temperature diagrams of a simple substance like water. In that diagram, x and y axes were correspond to the temperature and pressure. It shows, in the space of pressure and temperature, the equilibrium lines occur between all the 3 phases of water.
Answer:
1.08 m is the molality of the solution.
Explanation:
1st step: Determine the mass of solvent.
13% by mass means that 13 g are contained in 100 g of solution.
Solution mass = Solute mass + solvent mass
100 g = 13 g + Solvent mass
Solvent mass = 100 g - 13 g → 87 g
Second Step: Let's determine the moles of our solute mass (mass / molar mass)
13 g / 138.2 g/mol = 0.094 moles
Third step: Replace the data to determine molality.
Molality are the moles of solute in 1kg of solvent (mol/kg)
Before this, we must convert the solvent mass to kg
87 g . 1kg / 1000 g = 0.087 kg
molality → 0.094 mol / 0.087 kg = 1.08 m
