Chemistry, 26.02.2021 06:20 proudmarinemom7186
9. Wood and oxygen are commonly burned in campfires, and all that's leftover is ash and char. Which of the
following explanations best describes the chemical reaction taking place in a campfire? (7.PS1.4)
a
Mass is created in the reaction in the form of smoke.
b. Mass is destroyed in the reaction which causes the ash to be a light gray color,
c. The mass of the reaction increases as the wood gets hotter.
d. The total mass of the reaction stays the same, but mass leaves the wood as smoke.
Answers: 3
Chemistry, 22.06.2019 11:00
As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter
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Chemistry, 22.06.2019 18:00
The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.
Answers: 1
Chemistry, 22.06.2019 19:00
How does a catalyst increase the speed of a reaction? a. the catalyst eliminates the activated complex stage, allowing products to form immediately. b. the catalyst lowers the energy level of the reactants, making it easier for them to react. c. the catalyst makes it easier for the activated complex to form, lowering the activation energy. d. the catalyst raises the energy level of the products, making the reaction finish sooner. reset next
Answers: 1
Chemistry, 22.06.2019 19:30
Phosphorous can form an ion called phosphide, which has the formula p3â. this ion can form an ion called phosphide, which has the formula p3â. this ion properties very similar to those of pforms when a phosphorus atom loses three protonsis called a cationcontains 18 electrons
Answers: 2
9. Wood and oxygen are commonly burned in campfires, and all that's leftover is ash and char. Which...
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