Решение задач на приготовление растворов

Используется на уроках химии при решении задач на приготовление растворов-- Created using PowToon -- Free sign up at -- Create animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon’s animation templates help you create a