cho các bazơ sau đây:NaOH ;Mg(OH)2 ;Fe(OH)2;Fe(OH)3;KOH;Ba(OH)2 bazo nào là bazo tan, không tan. Hãy gọi tên chúng

What food can provide the body with a quick source of the energy needed to carry out cell functions (a) whole grain bread (b) ground hamburger (c) vegetable oil (d) whole milk

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

A60-tooth gear is connected to a 72-tooth gear.if the smaller gear turns 12 times,how many turns does the larger gear make?