Answer as soon as possible! 1.) list and describe the three challenges of life. 1. 2. 3. 2.) what is biology? 3) list the seven characteristics of life and give an example of each. 4) what is taxonomy? who is known as the father of taxonomy? 5) list the levels of classification from largest to smallest. 6) what is a dichotomous key? how do you use a dichotomous key? 7) list and describe the three domains of life. 1. 2. 3. 8) what are the 4 kingdoms of the domain eukarya? what is special about kingdom protista? 9) compare and contrast autotroph and heterotroph. 10.) what classifies something as an organism? 11.) how do organisms get energy? 12.) what is binomial nomenclature? 13.) what is binary fission?

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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.

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol