Answer:
Oxygen with the symbol O has the atomic number 8 which means it is the 8th element in the table. The number eight also means that oxygen has eight protons in the nucleus.
Explanation:
Ch2o is the empirical formula of the substance.
A river flows from approximately 45° north latitude toward the equator, as shown in the diagram below. As the water molecules in the river approach the equator the next to be happen is t<span>he molecules heat up and eventually form water vapor.
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Answer:
129.453 kJ is required to heat 0.850 pints of water
Explanation:
1 pint requires 36400 cal of energy to heat a pint of water from room temperature to boil.
Sometimes he uses 0.850 pints. The energy he needs then : 36400 * 0.85 = 30940 cal
Since we know that 1 cal = 4.184 J
⇒ 1 cal = 4.184J so 30940 cal =4.184 * 30940 = 129452.96 J = 129.453 kJ
So 0.850 pints of water require 129.453 kJ, at roomtemperature.