Ethanol is added to gasoline because the oxygen it contains improves gasoline's burning efficiency. its combustion reaction is given below. ch3ch2oh(l) 3o2(g) → 2co2(g) 3h2o(g) ∆h
a) is this an exothermic or endothermic reaction? b) if 15.3 grams of pure ethanol is completely converted to products, calculate how much heat is absorbed or released, in (1) kj and in (2) kcal. c) if 42.7 g of water vapor is produced, how much heat, in kl, is absorbed or released?

20 drops hope this

answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.

what is the question?

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.