The decomposition of N2O to N2 and O2 is a first order reaction. At 730 0C, thehalf-life of the reaction is 3.58x103 min. If the initial pressure of N2O is 2.10 atm at 730 0C, calculate the total gas pressure afterone half-life. Assume that the volume remains constant.

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

the answer is 75.0%.

the transfer of heat by electromagnetic radiation is called thermal radiation . it is usually carried out by electromagnetic waves in an energy range just below the visible spectrum, which is the infrared range.

so the answer would be radiation.

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