Answer:
2.7 cm³ = 2.7 x 10⁻⁶ m³
2.0 mm³ = 2.0 x 10⁻⁹ m³
Explanation:
The values are multiplied by the conversion ratio, being sure to raise the ratio to the power of 3 so that the units properly cancel:
(2.7 cm³)(1m/100cm)³ = 2.7 x 10⁻⁶ m³
(2.0 mm³)(1m/1000mm)³ = 2.0 x 10⁻⁹ m³
Let's divide the three experiments: The experiment with 10.00 mL of water is A), the experiment with 15.00 mL is B), and the experiment with 25.00 mL is C).
- (1) Now let's calculate the experimental density of each experiment. Density (ρ) is equal to the mass divided by the volume, thus:
- (2)To calculate the average density, we add each density and divide the result by the number of experiments (in this case 3):
- (3) The percent error is calculated by dividing the absolute value of the substraction of the theorethical and experimental values, by the theoretical value, times 100:
%error=
%error=
%error=2.44 %
The subscripts indicate the number of atoms of the element immediately before it.
For example, the atomic mass of an oxygen atom is 16.00 amu; that means the molar mass of an oxygen atom is 16.00 g/mol. Further, if you have 16.00 grams of oxygen atoms, you know from the definition of a mole that your sample contains 6.022 x 10^23 oxygen atoms.
The gas flows from higher concentration/pressure to lower concentration/pressure, which is outside the ball.