Which of the following reactions in a redox reaction? a
2 Mg(s) + O2(g) → 2 MgO(aq)

b
HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)

c
Pb(NO3)2(aq) + KCl(aq) → PbCl2(aq) + KNO3(aq)

d
CaCO3(s) → CaO(s) + CO2(g)

Compare the valence electron configuration of the nobles gas elements seen here. what statement is correct?

What is the wavelength of a 3*10^12 hz infrared wave a 3*10^20m b 1* 10^4m c 3*10^-3m d 1*10^-4 m

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.