True. Ions can have a positive or negative charge.
the melting point of water is 32 degrees Fahrenheit , 0 degrees Celsius. <span />
B. 1, 1, 1, 2
Explanation:
You only need to balance the NaNO3 on the right. Since there is 2 NO3 on the left, you need to put a 2 in front of the NaNO3 on the right. Everything else is already balanced so the only coefficient needed is 2 in front of the NaNO3.
The pebbles become smooth and even because of erosion. the waves from the sea rub against the pebbles this is erosion. x