Chemistry, 12.07.2019 00:30 runaway173
Asolution was formed by combining 25.0 g of solid a with 60.0 ml of distilled water, with the water initially at 21.4 °c. the final temperature of the solution was 25.3 °c. calculate the heat released as the solid dissolved, qsoln, assuming no heat loss to the calorimeter (see equation 1).
Answers: 1
Chemistry, 21.06.2019 20:30
Un cierto gas tiene un volumen de 800ml a 80°c y 600ml a 80°c y 600mmhg de presión. ¿cual será el volumen del gas a condiciones normales? sí el gas es oxígeno, ¿cuál será su peso? y ¿cuántas moléculas están presentes en el sistema?
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Chemistry, 21.06.2019 22:50
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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Chemistry, 22.06.2019 11:30
If blood contains 150g of hemoglobin per liter of blood, how much hemoglobin would be contained in 10 ml of blood
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Chemistry, 22.06.2019 12:00
What does a complete balanced chemical equation include? a. exothermic coefficients b. endothermic coefficients c. valence electrons d. molar coefficients
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Asolution was formed by combining 25.0 g of solid a with 60.0 ml of distilled water, with the water...
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