Rank the following molecules in terms of their expected λmax in the u. v.-visible spectrum.

1. structures of 1,5-diphenyl-1,4-pentadien-3-one,
2. benzaldehyde
3. 1-phenyl-1-buten-3-one.

He table below gives the atomic mass and relative abundance values for the three isotopes of element m. relative abundance (%) atomic mass (amu) 78.99 23.9850 10.00 24.9858 11.01 25.9826 what is the average atomic mass (in amu) of element m? 2.86 5.36 24.30 24.98

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?

Write a balanced equation showing the formation of copper (ii) nitrite from its elements