Beaker X contains 100 milliliters of water and Beaker Y contains 250 milliliters of water. Each beaker is heated on a hot plate at the same medium heat setting for five minutes. Which is the best prediction of the water temperature in the beakers?

Modern pennies are composed of zinc coated with copper. a student determines the mass of a penny to be 2.482 g and then makes several scratches in the copper coaling (to expose the underlying zinc). the student puts the scratched penny in hydrochloric acid, where the following reaction occurs between the zinc and the hcl (the copper remains undissolved): zn(s) + 2 hcl(aq) → h2(g) + zncl(aq)the student collects the hydrogen produced over water at 25 °c. the collected gas occupies a volume of 0.899 l at a total pressure of 79 j mmhg. calculate the percent zinc (by mass) in the penny. (assume that all the zn in the penny dissolves.)

Plz ill give u brainliest which of the following steps is not likely to take place during cellular respiration? a. oxygen combines with carbon of simple sugar. b. energy molecule transfers energy to cells. d. energy is used up.

Draw the aromatic compound toluene (methylbenzene). show all hydrogen atoms, including those on the ring.