We know that carbohydrates and proteins typically supply 4kcal of energy per gram and fats supply 9kcal of energy per gram. using this information, calculate the number of food calories in a snickers bar if it contains 11 g of fat, 5 g of protein, and 37 g of carbohydrates.

Apeak with a retention time of 407 s has a width at half-height (w1/2) of 7.6 s. a neighboring peak is eluted 17 s later with a w1/2 of 9.4 s. a compound that is known not to be retained was eluted in 2.5 s. the peaks are not baseline resolved. how many theoretical plates would be needed to achieve a resolution of 1.5?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Write the formula for the following chemicals. 7. e. trinitrogen tetraoxide a calcium phosphate f. magnesium acetate b. potassium sulfide g nickel(iii) cyanide c carbon dioxide h. silver sulfate d. cobalt(ii) chloride