En la ecuación: Fe2O3 + CO = Fe + CO2. El agente reductor es:

a)oxido ferrico

b)dióxido de carbono

c)monóxido de carbono

d)hierro​

In which of these cases are the two wave points considered to be in phase with each other?

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

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