¿Son los grupos funcionales de los alquinos?

Which of the following pairs of elements belong to the same groupa. h and he b. li and bec. c and pb d. ga and ge

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.