This table shows experiments done by five scientists.ScientistExperimentKylecut a bar of gold in halfKatieburned paper into ashGracereacted acid and limestone together, forming carbon dioxideIsaacmelted solid aluminum, forming liquid aluminumCalebadded oxygen to metal, forming rust
Wood is a substance that burns in the presence of oxygen. Which best describes this property of wood?
Which statement describes one feature of chemical changes?
When Gerald mixes baking soda and vinegar, the materials combine to turn into a gas. What can Gerald assume occurred?
A chemist mixes oxygen gas and hydrogen gas to form water, which is composed of one oxygen and two hydrogen atoms per molecule. What has occurred?
Which scenario best describes a chemical change?
The mixing of barium chloride and sodium sulfate is a precipitate reaction. This reaction generates barium sulfide and sodium chloride.
Indicators change color when an acid and a base are mixed together. The change in color most likely indicates that
Which statement best describes most chemical changes?
In the reaction 2Na + Cl2 → 2NaCl, the products are
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