Chemistry, 16.11.2020 23:40, powberier6979
Lava often flows into the ocean from volcanoes. A student wants to know how much water would be needed to
cool a small sample of lava to 100°C. She calculates that the water would need to absorb 2,000 kJ of energy to
cool the lava. She also finds the information in the table.
Temperature of ocean water 26.0°C
Specific heat of water 4.186 kJ/kg°C
Use the equation q= mc^T to calculate the mass of water needed to cool the lava.
A
3.79 kg
B
4.78 kg
С
6.46 kg
D
18.4 kg
Answers: 3
Chemistry, 22.06.2019 17:00, brownvester44
Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.
Answers: 2
Chemistry, 23.06.2019 03:50, timothymoles
Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products
Answers: 1
Lava often flows into the ocean from volcanoes. A student wants to know how much water would be need...
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