1. What is the empirical formula for
a compound that is 50.61%
copper (Cu), 11.16% nitrogen (N),
and 38.23% oxygen (O)?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

What is the percentage of hydrogen in c2h4

The data below were determined for the reaction shown below. s2o82– + 3i – (aq) → 2so42– + i3– expt. # [s2o82–] (m) [i –] (m) initial rate 1 0.038 0.060 1.4 × 10 – 5 m/s 2 0.076 0.060 2.8 × 10 – 5 m/s 3 0.076 0.030 1.4 × 10 – 5 m/s the rate law for this reaction must be: