An unknown substance was observed and the following information obtained: The unknown substance is a shiny gold solid with a density of 8.72 g/mL. The unknown does not dissolve in water, but, when placed in acid, begins to fizz and produce gas. When heated, the substance produces two different new materials. Which of the following is true: Group of answer choices The substance is not an element. A physical property of this substance is that it is soluble in acid. A chemical property of this substance is that it's density is 8.73 g/mL This substance must be a mixture.
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
An unknown substance was observed and the following information obtained:
The unknown substance is a shiny gold solid with a density of 8.72 g/mL. The unknown does not dissolve in water, but, when placed in acid, begins to fizz and produce gas. When heated, the substance produces two different new materials.
Which of the following is true:
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