N2H4 (1) --> N2 (g) + 2 H2 (g) 2 H2(g) + O2 (g) --> 2 H20 (1)
- If you lost some of your hydrogen gas during your reaction and only produced 7.25 g of H2
(g) how many grams of water will you produce?
1g = 1ml and 1 L = 1000 ml
- How many liters of water will this produce?
- Watney needs 618L of water to survive on Mars until the next mission arrives and can
rescue him. Does 7.25g of H2 produce enough water for him to survive?

The atomic radius of sodium is 186 pm and of chlorine is 100 pm. the ionic radius for na+ is 102 pm and for cl– is 181 pm. in going from na to cl in period 3, why does the atomic radius decrease while the ionic radius increases? a. the inner electrons in the sodium cation shield its valence electrons more effectively than the inner electrons in the chloride anion do. b. the inner electrons shield the valence electrons more effectively in the chlorine atom than in the chloride anion. c. the outermost electrons in chloride experience a smaller effective nuclear charge than those in the sodium cation do. d. the outermost electrons in chloride experience a larger effective nuclear charge than those in the sodium cation do. e. monatomic ions are bigger than the atoms from which they are formed.

The minerals found in bones are deposited by living cells called

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.