What is the most obvious sign of a chemical change in this reaction.
a. a gas was produced.
b. the powder mixed with the water.
c. there was a change in temperature. eliminate
d. the powder dissolved in the water.?

Starch and are common polysaccharide carbohydrates found in plants. sucrose glycogen fructose cellulose

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?

Which produce would best increase the amount of heat energy that is actually gained by calorimeter b