cho 7,35 gam hỗn hợp gồm kim loại kiềm A và Kali tác dụng với nước . để trung hòa dung dịch thu được cần 0,25 mol HCl vậy A là ?

State the formula for density in words and mathematical symbols

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

Which formula can be used to calculate the molar mass of hydrogen peroxide