Chemistry, 04.02.2021 04:50 loudermilkb117
Someone please help me with these two problems. I will give the formula too from above the question is:
1. How much heat is lost when a 500g sample of copper is cooled from 450 degrees celsius to 20 degrees celsius
2. How much heat is gained when a 20g mercury thermometer is raised from 25 degrees celsius to 35 degrees celsius
Answers: 2
Chemistry, 22.06.2019 07:30
11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
Answers: 3
Chemistry, 22.06.2019 17:30
What will most likely happen in the absence of a cell membrane? a) photosynthesis will not take place. b) the cell will not store food, water, nutrients, and waste. c) energy will not be released during cellular respiration. d) substances will pass in and out of the cell in an uncontrolled manner.
Answers: 1
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, 23.06.2019 04:00
What two categories of toxins were present in the air at dish,texas as a result of the gas pipelines that pass through the area
Answers: 1
Someone please help me with these two problems. I will give the formula too from above the question...
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