04/22/20

#### Calculating K from Free Energy Equation

The reaction 2H(g) + O(g) → 2HO(g) is used to fuel some liquid-propellant rockets. Although it has an unfavorable change in entropy (ΔS = −88.84 J/K), it is very exothermic, with a negative...
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04/22/20

#### What mass of calcium chloride, CaCl2, is needed to prepare 2.85 L of a 1.56 M solution?

What mass of calcium chloride, CaCl2, is needed to prepare 2.85 L of a 1.56 M solution? 316 grams203 grams493 grams25.0 grams

05/19/15

#### Three high school physics problems please help!

1. The Milky Way contains a supermassive black hole with mass of 4 million times the Sun(!).
a. If the black hole is 2.4x10^20 away from Earth, calculate the gravitational force between the black...
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