How does the composition of a mixture of hydrogen and oxygen differ from the composition of a compound containing hydrogen and o
1 answer:
Chemical compounds have chemically bonded molecules so that they exhibit different properties (i.e. chemical) compared to the individual molecules comprising the compound. Mixtures are simply the combinations of different molecules and compounds that are not chemically bonded together, and can therefore be separated by physical means. Mixtures usually retain the properties of its components.
The hydrogen and oxygen molecules in a mixture do not form strong bonds between each other. The molecules of both gases are only contained in the same space or volume and the individual molecules retain their chemical properties.
A compound containing hydrogen and oxygen molecules exhibit different chemical (and even physical) properties compared to the individual molecules themselves.
Water for example, is a compound with 2 hydrogen atoms and 1 oxygen atom, chemically-bonded together. Hydrogen gas is highly flammable, water is not. Oxygen gas is an essential reagent for combustion (or burning) reactions, water is not.
Thus, throwing a lighted match to a gaseous mixture of hydrogen
and oxygen 
would create fire, or even an explosion (since hydrogen is flammable and oxygen feeds the reaction). Throwing a match to water vapor 
would not create fire.
The hydrogen and oxygen molecules in a mixture do not form strong bonds between each other. The molecules of both gases are only contained in the same space or volume and the individual molecules retain their chemical properties.
A compound containing hydrogen and oxygen molecules exhibit different chemical (and even physical) properties compared to the individual molecules themselves.
Water for example, is a compound with 2 hydrogen atoms and 1 oxygen atom, chemically-bonded together. Hydrogen gas is highly flammable, water is not. Oxygen gas is an essential reagent for combustion (or burning) reactions, water is not.
Thus, throwing a lighted match to a gaseous mixture of hydrogen
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Answer:
1) La masa del agua a temperatura ambiente es de 500 gramos, 2) La masa del agua cuando se congela es de 500 gramos, 3) La masa de agua que queda después de la evaporación es de 400 gramos, 4) Se ha evaporado 100 gramos de agua.
Explanation:
1) <em>¿Cuál es la masa de agua a temperatura ambiente?</em>
Podemos determinar la masa inicial del agua (), medido en gramos, al conocer su densidad (
), medida en gramos por mililitro, y volumen inicial ocupado en el vaso de precipitado (
), medido en mililitros, a partir de la siguiente expresión:
Si sabemos que y
, entonces:
La masa del agua a temperatura ambiente es de 500 gramos.
2) <em>¿Cuál es la masa de agua cuando se congela?</em>
Puesto que el proceso de congelación no implica transferencia de masa, la masa de agua se conserva al transformarse en hielo. Por tanto, la masa resultante es de 500 gramos.
3) <em>¿Cuál es la masa de agua que queda después de la evaporación?</em>
Durante la evaporación una parte del agua es transferida al aire, entonces podemos calcular la masa final (), medido en gramos, de la sustancia al multiplicar el volumen final (
), medido en mililitros, por la densidad del agua (
), medida en gramos por mililitro,. Es decir,
Si sabemos que y
, entonces:
La masa de agua que queda después de la evaporación es de 400 gramos.
4) <em>¿Qué masa de agua se evaporó? </em>
Determinamos que la masa evaporada de agua (), medida en gramos, es igual a la diferencia entre las masas inicial y final, ambas medidas en gramos:
Si y
, entonces tenemos que:
Se ha evaporado 100 gramos de agua.