Chemistry Homework Help

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Units of Energy

Q. The label on packaged food indicates that it contains 215 Cal per serving. Convert this amount of energy to joules. (a)51.4 J (b)5.14 × 104 J (c)5.14 × 10−2 J (d)9.00 × 102 J (e)9.00 × 105 J

Solved • Nov 17, 2019

Units of Energy

Q. Calculate the number of calories in 723.01 J. (a)172.80 cal (b)172.8 cal (c)3025.1 cal (d)3025 cal (e)0.173 cal

Solved • Nov 17, 2019

Units of Energy

Q. To make use of an ionic hydrate for storing solar energy, you place 560.0 kg of sodium sulfate decahydrate on your house roof.

Solved • Oct 14, 2019

Units of Energy

Q. A typical candy bar weighs about 2.00 oz (1.00 oz = 28.4 g).

Solved • Oct 14, 2019

Units of Energy

Q. How many MeV are released per nucleus when 2.30 x 10^-3 mol of chromium-49 releases 8.11 x 10^5 kJ. __ MeV/nucleus

Solved • Aug 5, 2019

Units of Energy

Q. Arsenic-84 decays with an energy of 1.57 x 10^-15 kJ per nucleus. (a) Convert this energy into electron volts: Enter your answer in scientific notation. __ x 10 __ eV (b) Convert this eneru into :MeV: __MeV

Solved • Aug 5, 2019

Units of Energy

Q. A 3H nucleus decays with an energy of 0.01818 MeV Convert this energy into (a) electron volts; (b) joules. Enter your answers in scientific notation. __ x 10 __ eV __ x 10 __ J

Solved • Aug 5, 2019