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___17. क्या होता है जब जल को 0°C तक ठंडा किया जाता है?gas ko Thanda karne...
Chemistry, 06.04.2020 09:44 haleeleslie
पापा पा पारमापा लिखा
___17. क्या होता है जब जल को 0°C तक ठंडा किया जाता है?gas ko Thanda karne par kya hota hai
Answers: 3
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Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point
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If 1.8 l of water is added to 2.5l of a 7.0 molarity koh solution, what is the molarity of the new solution
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Which theory was contradicted by experiments with the photoelectric effect? light spreads out after it passes through a small opening. as soon as light strikes metal, electrons will be ejected. visible light, regardless of color, will cause the ejection of electrons when striking metal. the kinetic energy of ejected electrons depends on the frequency of light that strikes the metal.
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