Coffee and tea are weak acids. what would you expect their ph values to be?

What overall charge must all compounds have

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.

How many neutrons does an element have if its atomic number is 50 and its mass number is 166