According to the balanced equation: MgCO3 (s) + 2 HBr (aq) → MgBr2 (aq) + CO2 (g) + H2O (l) how many mL of 3 M HBr solution are needed to react completely with 7.22 g of MgCO3?

2points why do scientists need governmental funding? o a. government politicians ask all the important scientific questions. o b. scientists have to pay taxes to the government on the money they make. o c. the cost of doing scientific research can be very high. o d. the government is controlled by scientists. submit

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

Ais a mountain created from eruptions of lava, ash, rocks, and hot gases.