1) NaOH + H, CO, → Na, Co, + H,0 a- Balance the chemical equation
b- What is the mole ratio between sodium carbonate and carbonic acid?
Find the mass of water when 3.5 moles of NaOH react
d- Find the number of moles of Na2CO3 produced when 5.7x1023 formula units of NaOH react

Which statement best describes the oxidation numbers of the atoms found in magnesium chloride? a. magnesium has a 2- oxidation number and chlorine has a 1+ oxidation number. b. magnesium has a 2- oxidation number and chlorine has a 2+ oxidation number. c. magnesium has a 2+ oxidation number and chlorine has a 1- oxidation number. d. magnesium has a 1+ oxidation number and chlorine has a 1- oxidation number.

The movement of tectonic plates and in two locations is described below: location a: tectonic played push together location b: tectonic plates push apart

According to the passage, which of these is true about gray water systems? a) gray water systems use plants that require less water. eliminate b) gray water systems require the use of less fossil fuels. c) gray water systems reduce the amount of fresh water used. d) gray water systems reduce the amount water used by shower heads.