Based on the complete and balanced reaction below, what is the charge for copper (Cu)?
You must provide two pieces of evidence to support your claim.
Look at the reaction below to answer the question. Remember that
copper (Cu) is a transition metal and it can have different possible
charges:
2NaCl + Cu(NO3)2 --> 2NaNO3 + CuCl2

How many atoms of mg are present in 97.22 grams of mg? 6.022 × 1023 2.408 × 1024 4.818 × 1024 5.855 × 1025

The content of manganese (mn) in steel was determined spectrophotometrically and with the use of the standard addition method. an unknown sample of mn from a digested steel sample gave an absorbance of 0.185 when analyzed spectrophotometrically. when 5.00 ml of solution containing 95.5 ppm mn was added to 50.0 ml of the unknown steel solution (digested sample), the absorbance was 0.248. calculate the concentration, in parts-per-million (ppm), of mn in the digested steel sample solution.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?