Is the equation above balanced? How do you know? Mg + 2HCl → MgCl2 + H2

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness