have a huge test tomorrow, please help!! teacher is awful at explaining, and i jsut need to know more about
telling the differences between heterogeneous, solutions (homogeneous), micxtures, and compounds
physical vs. chemical reations
physical vs. chemical properties
2006-08-31 13:11:38 · 2 answers · asked by abbs 2 in Science & Mathematics ➔ Chemistry
a physical reaction happens to an object, a chemical reaction changes the composition of the substance. Getting hit with a ball is a physical reaction. neither you nor the ball change what they are. Adding vinegar to baking soda is a chemical reaction. It changes both substances to a new one. The fizzy mush you get is now neither vinegar nor soda. A compound is when two elements bond together: Salt for example, NaCl : Sodium bonded to chlorine... Water: H2O Two hydrogen atoms bonded to an oxygen. A homogenous mixture is a mixture or solution where two compunds maintaing their individual essence. Salt dissolves in water. You can taste the salt, and drink the water: a homogenous mixture. Oh wow.. check out this link I found.... good luck on your test :)
2006-08-31 13:28:15 · answer #1 · answered by dbs1226 3 · 0⤊ 0⤋
i have a test over that tomrrow too. too bad i dont know alot of it. sorry.
2006-08-31 13:14:05 · answer #2 · answered by kaitlin_danette09 2 · 0⤊ 1⤋