A 6.4 g sample of rocket fuel is found to contain 5.6 g of nitrogen and 0.80 g of hydrogen. The molecular molar mass of the compound is twice that of its empirical molar mass. Determine the empirical formula and the molecular formula of this compound. NH₅ & N₂H₁₀

NH₂ & N₂H₄

N₂H & N₄H₂

NH₇ & N₂H₁₄

None of these.

The density of water is 1 g/cm cubed and in order for the pebble to sink its density has to be greater than the density of water and in order for the twig to float its density has to be less than the density of water

While unproven, it uses facts to support part of a conclusion. it is still factual and has predictive power, however.

Answerd. may include all of these are many definitions of bases: the  brønsted-lowry definition of acids and bases says that bases are proton acceptors.the arrhenius definition of acids and bases says that bases increase [oh⁻] in solution (thereby producing oh⁻ ions)the lewis definition of acids and bases says that bases donate electron pairs.therefore, the sensible answer is that a base may include all of the described characteristics.

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.