How many moles of Na20 are required to produce 160 grams of NaOH (40.00 g/mol)?

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

the right answer is c i just did the question.