Answer:
I would say you would check for temperature change. A chemical reaction is shown by a change in color, a change in temperature, solids forming, odor, or smoke. So check temperature.
edit: while odor is an option in the answer. i think temp is a better choice.
Answer: ZnS
Explanation: usually salts of alkali metals are well soluble in water.
Also most nitrates are well soluble.
Sulfides of transition metals are generally insoluble in water
Carbon dioxide is a gas at normal room temperature and atmospheric pressure. Carbon dioxide gas converts into solid carbon dioxide when frozen to a particular temperature with no intermediate liquid phase. This frozen or solidified carbon dioxide is called dry ice. Dry ice is formed when gaseous carbon dioxide is cooled to very low temperatures under high pressure. High pressure brings about condensation of the gas molecules and low temperature solidifies the carbon dioxide gas. Therefore, tow factors that help in formation of dry ice are low temperature and high pressure.
Answer:
3.00x107 cm
Explanation:
They answer would be the 4th one
That would be protons ! They are positive
