Answer:
mixture
Explanation:
Chromatography separates components of a material based on their difference in polarity. Since the chromatography experiment resulted in more than one mark appearing, there must be more than one component in the material.
Upon standing for 24 hours, the liquid ink separates into its different components based on their differing properties, such as density or solubility. Since a pure substance is homogeneous and has the same properties throughout, the ink cannot be a pure substance.
Fossil Fuels give off energy when they are burned
One valuable fossil fuel is natural gas. It is a cleaner-burning fuel source.
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Marble has the same mass but a different volume so its less dense
Answer:
1.39 × 10⁴ g
Explanation:
Step 1: Given data
Density of gold (ρ): 19.3 g/cm³
Volume of the gold bar (V): 720 cm³
Step 2: Calculate the mass (m) of the gold bar
The density of a substance is equal to its mass divided by its volume. This is expressed through the following expression.
ρ = m/V
m = ρ × V
m = 19.3 g/cm³ × 720 cm³
m = 1.39 × 10⁴ g
The mass of the gold bar is 1.39 × 10⁴ g.