In which reaction is nitric acid acting as an oxidising agent ? A Cu+4HNO 3 Cu(NO 3 ) 2 +2H 2 O+2NO 2 B CuO+2HNO 3 Cu(NO 3 ) 2 +H 2 O C Na 2 CO 3 +2HNO 3 2NaNO 3 +H 2 O+CO 2 D NaOH+HNO 3 NaNO 3 +H 2 O

Calculate the frequency of a wave in a spring toy. the wave has a speed of 1.1 meters per second and a wavelength of 0.1 meters. *

Pinene is an unsaturated hydrocarbon found in pine resin. if pinene has m+ = 136 and contains 1 double bond(s) and 2 ring(s); what is its molecular formula? enter the formula in the form ch first, then all other atoms in alphabetical order; do not use subscripts. the formula is case-sensitive

Scientists often deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each of these numbers in an alternate form.