Chemistry, 19.01.2021 22:00 darrenmcfadden220
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When oxygen reacts with hydrogen, it has the capacity to release 29 kilojoules of energy. Inside a fuel cell, oxygen reacts with hydrogen to produce 23 kilojoules of useful energy. The rest of the energy is lost as heat. What’s the efficiency percentage of the fuel cell?
The efficiency of the fuel cell is percent.
Answers: 2
Chemistry, 22.06.2019 17:10
Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth
Answers: 2
Chemistry, 23.06.2019 08:40
Calculate the number of grams of sodium in 3.00 g of each sodium-containing food additive.
Answers: 3
Type the correct answer in the box. Round your answer to the nearest whole number.
When oxygen reac...
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