Question 3: The following reaction between calcium hydride and water is used to inflate life rafts and weather balloons: CaH2(s) + 2 H2O(l) → Ca(OH)2(aq) + 2 H2(g) If 65.0 grams of CaH2(s) is completely reacted with an excess of water, then: 1. What mass, in grams, of hydrogen gas will be produced? 2. What volume (in L) would the hydrogen gas generated in part (A) occupy at 12.0oC and 745 Torr?
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.
Question 3: The following reaction between calcium hydride and water is used to inflate life rafts and weather balloons:
CaH2(s) + 2 H2O(l) → Ca(OH)2(aq) + 2 H2(g)
If 65.0 grams of CaH2(s) is completely reacted with an excess of water, then:
1. What mass, in grams, of hydrogen gas will be produced?
2. What volume (in L) would the hydrogen gas generated in part (A) occupy at 12.0oC and 745 Torr?
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