Which is the most likely reason that magnets will sometimes repel one another?

Select one:

Neither magnet has a charge

One magnet has a positive charge and the other is neutral

One magnet has a negative charge and the other is neutral

Both magnets have the same charge

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

Now look at the segment of the graph between the two data points marked with black squares. describe how the boiling point and melting point plots behave between these points. be as specific as possible.

Which type of volcano is shown in the image?