Ai citit pe coperta unei cartii urmatoarea cugetare: ,nu judeca o carte dupa coperta."înlocuieste cele doua substantive cu altele.(de exemplu ,nu judeca un om dupa haina.)scrie-le in jurnalul tau. relateaza in 80-100 de cuvinte, o întâmplare imaginară la care ia parte unul dintre personajele textului citit.

How are elements arranged in a periodic table

The covalent compound acetylene, which is the fuel of the oxyacetylene torch used by welders, has the molecular formula c2h2. the covalent compound benzene, a commercial solvent, has the molecular formula c6h6 each of these covalent compounds contains carbon and hydrogen atoms in a one-to-one ratio. would it be correct to write the chemical formulas of each as ch? explain.

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