ΔS is positive for the reaction . a. C2H4 (g) + H2 (g) → C2H6 (g) b. Mg (s) + Cl2 (g) → MgCl2 (s) c. 2NO (g) + O2 (g) → 2NO2 (g) d. 2N2 (g) + 3H2 (g) → 2 NH3 (g) e. C3H8 (g) + 5 O2 (g) → 3CO2 (g) + 4 H2O (g)

What are scientists who study fossils called? ( a ) astronomers. ( b ) biologists. ( c ) geologists. ( d ) paleontologists.

Which of the following is the correct formula for copper (i) sulfate trihydrate? cuso4 · 3h2o cuso4(h2o)3 cu2so4(h2o)3 cu2so4 · 3h2o

Plzz a sample of table sugar (sucrose, c12h22o11) has a mass of 7.801 g. ● a) calculate the number of moles of c12h22o11 in the sample b) calculate the number of moles of each element in c12h22o11 (number of moles of c, number of moles of h & number of moles of o) in the sample. (use your answer from part a as your starting point.) show your work and highlight your final answer. calculate the number of atoms of each element in c12h22o11 (number of atoms of c, number of atoms of h & number of atoms of o) in the sample. (use your answers from part b as your starting for each element.) show your work and highlight your final answer.