Apiece of aluminum at 81.9°c is placed in a calorimeter containing 75.0 grams of water at 24.9°c. if the temperature at equilibrium is 28.3°c, what is the mass of the aluminum?

Select the correct answer. which statement is true about a polarized object? o a. it gains electrons and becomes negatively charged. ob. it gains protons and becomes positively charged. oc. the number of positive and negative charges can be the same. od. it has to be a metal. o e. there is no change in the distribution of the charge in the object. reset next what

For the reaction c6h14(g) & longrightarrow; c6h6(g) + 4h2(g), δp(h2)/δt was found to be 2.5 x 10-2 atm/s, where δp(h2) is the change in pressure of hydrogen. determine δp(c6h14)/δt for this reaction at the same time.

Which type of intermolecular attractions holds ammonia molecules together with other ammonia molecules?