Check my answers ? only 5 multiple choice questions. i'm really confused. any and all is appreciated! will give medal! 1. which of the following is a correctly written thermochemical equation? nh4cl nh4+ + cl 2c8h18 + 25o2 16co2 + 18h2o, h = 5,471 kj/mol fe (s) + o2 (g) fe2o3 (s), h = 3,926 kj --> c3h8 (g) + 5o2 (g) 3co2 (g) + 4h2o (l), h = 2,220 kj/mol 2. how does a phase change affect a thermochemical equation? it alters the moles of reactants. --> it can affect the (delta) h value. it alters the products. it affects the balance of the equation.

Imagine if during the cathode ray experiment, the size of the particles of the ray was the same as the size of the atom forming the cathode. which other model or scientific observation would have also been supported? 1. this would support dalton's postulates that proposed the atoms are indivisible because no small particles are involved. 2. this would support bohr's prediction about electrons moving in orbits having specific energy. 3. this would support bohr's prediction about electrons being randomly scattered around the nucleus in the atom. 4. this would support dalton's postulates that proposed that atoms combine in fixed whole number ratios to form compounds.