Vitamin A has a molar mass of 286.4 g and has a general molecular formula of CxHyE, where E is an un-known element. If vitamin A is 83.86% C and 10.56% H by mass, what is the molecular formula of vitamin A?
Answer to relevant QuestionsBoron consists of two isotopes, 10B and 11B. Chlorine also has two isotopes, 35Cl and 37Cl. Consider the mass spectrum of BCl3. How many peaks would be present, and what approximate mass would each peak correspond to in the ...An unknown binary compound containing hydrogen (XHn) has a density as a gas that is 2.393 times that of oxygen gas under the same conditions. When 2.23 × 10-2 mole of this compound reacts with excess oxygen gas, 0.803 g of ...Lanthanum was reacted with hydrogen in a given experiment to produce the nonstoichiometric compound LaH2.90. Assuming that the compound contains H2, La2+, and La3+, calculate the fraction of La2+and La3+ present. Silane (SiH4) is the silicon analogue of methane (CH4). It is prepared industrially according to the following equations: Si(s) + 3HCl(g) → HSiCl3(l) + H2(g) 4HSiCl3(l) → SiH4(g) + 3SiCl4(l) a. If 156 mL of HSiCl3 (d = ...A sealed balloon is filled with 1.00 L of helium at 23oC and 1.00 atm. The balloon rises to a point in the atmosphere where the pressure is 220. torr and the temperature is 231oC. What is the change in the volume of the ...
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