What is the percent of each element in (NH4)2(S04)

*with steps if possible*

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What are the chemical names of these compounds? ke: mg3n2: reset next

What element has similar physical and chemical properties as boron.