Na chemical reaction, exactly 2 mol of substance a react to produce exactly 3 mol of substance b. 2a⟶3b how many molecules of substance b are produced when 27.6 g of substance a reacts? the molar mass of substance a is 27.8 g/mol. step 1: convert the mass of a to moles. moles of a: mol step 2: convert the number of moles of a to the number of moles of b. moles of b: mol step 3: convert the number of moles of b to molecules of b. molecules of b:

Compare and contrast physical changes with chemical changes.

Melting and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Someone offer some answers to this, i will give 98 coins and mark as brainliest! i will put the rest of the lab down in the comments, solutions pre-lab questions: in this lab, you will make fruit drinks with powdered drink mix. complete the pre-lab questions to get the values you need for your drink solutions. calculate the molar mass of powered fruit drink mix, made from sucrose (c12h22o11).using stoichiometry, determine the mass of powdered drink mix needed to make a 1.0 m solution of 100 ml. (hint: use molarity = to find the moles of drink mix, then convert moles to grams using a mole conversion.)what mass of powdered drink mix is needed to make a 0.5 m solution of 100 ml?