Laboratory Grade Sodium Hydrogen Carbonate Bicarbonate, 2.5kg Hypotenuse_50mm Five-hundred-gram bottle of coarse 50-mesh

Five-hundred-gram bottle of coarse 50-mesh laboratory-grade iron filings

Concave glass mirror at 75mm diameter and 150mm focal length on a ~3mm-thick blank

Jumbo honey bee life cycle model demonstrates complete metamorphosis

4 inches with thread-fitted adjustment

demonstrating potential-to-kinetic energy conversion through cord-suspended winding and unwinding

Laboratory Grade Sodium Hydrogen Carbonate Bicarbonate, 2.5kg Hypotenuse_50mm Five-hundred-gram bottle of coarse 50-meshSmaller 2. 5kg pack of laboratory grade sodium hydrogen carbonate (NaHCO3), the standard buffering and acid neutralization agent for general chemistry and biology laboratory student work.