Tính chất hóa học của kim loại , phi kim , oxit , bazo , muối . Viết phương trình minh họa

The speed of light is around 6.706×10^8 miles per hour. what is the speed of light in units of miles per minute?

Often on a topographic map, every fifth contour line is darkened. what is this line called? a. key b.slope c.benchmark d. index contour

How many liters of hydrogen gas will be produced at stp from the reaction of 7.179×10^23 atoms of magnesium with 54.219g of phosphoric acid (h3po4) the equation is 3mg + 2h3(> mg(po4)2+3h2