Assuming no calorie intake from water or minerals, if a 100 gram steak contains 49% water, 15% protein, 0% carbohydrates, and 36% fat, what is the estimated gross energy content of the steak (in kcal)? For every 3500 Cal consumed but not burned up through activity, roughly 1 pound of body fat is produced. If no energy is burned up during the eating of steak, how many pounds of body fat are stored?

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

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