30
Answers: 3
Chemistry, 22.06.2019 06:00
If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?
Answers: 3
Chemistry, 22.06.2019 12:00
Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.
Answers: 2
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
The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom?
28
30
30
Mathematics, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
History, 23.03.2021 01:00
Biology, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
English, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00
History, 23.03.2021 01:00
Advanced Placement (AP), 23.03.2021 01:00
Geography, 23.03.2021 01:00
Mathematics, 23.03.2021 01:00