In a chemical reaction, atoms are created or destroyed. true or false user: heat, gas production, and color change can all be evidence of chemical change. true or false

Chemical term for Bromine at room temperature

Watch the animation, then check off the samples that will conduct electricity.

Tough and malleable form of iron is A. Wrought iron B cast iron C pig iron D stainless steal E non of the above

Why are tombstones in a cemetery useful for comparing rates of weathering?

Calculate how many moles of NH3 form when each quantity of reactant completely reacts according to the equation: 3N2H4 (l) →4NH3 (g) + N2 (g) A.) 2.0 mol N2H4

Balance the following chemical equation: / text{CH}_ 4 + CH 4 + start text, C, H, end text, start subscript, 4, end subscript, plus / text{O}_ 2 / rightarrow 2 →start text, O, end text, start subscript, 2, end subscript, right arrow / text{CO}_2 +

How did the invention of the spectroscope in 1859 change the science of chemistry

Will zinc and sodium carbonate react?

What fraction of carbon 14 remains in an animal frozen in a glacier 18000 years ago?

How do you convert the number of molecules of a substance to the number of moles? a. add Avogardo's number b. subtract Avogardo's number c. multiply Avogardo's number d. devide Avogardo's number