Which technology is unted to service versand

If vinegar is added to baking soda, the reaction Cu (s) + 2Ag (NO3) (aq) à 2Ag (s) + Cu (NO3) 2 (aq) occurs. What evidence would indicate that the reaction is occurring? a. a precipitate is formed b. light and heat are given off c.

Non-example of applied force

Which atom attracts electrons more strongly? cesium (Cs) bromine (Br)

The element nickel has five naturally occurring isotopes. Which of the following describes the relationship of these isotopes?

The whale shark has rows of teeth despite being a filter feeder. What's the best explanation of this feature? A. The whale shark's teeth are an example of vestigial structures.

Using your knowledge of symbols, determine which compound listed must contain both copper and oxygen. a. glucose, C6H12O6 b. chalcopyrite, CuFeS2 c. malachite, Cu2CO3 (OH) 2 d. calcite, CaCO3

Molecules move most slowly in: solids liquids gases compounds

When limestone (solid) is heated, it decomposes into lime (solid) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powdered lime mixed with water is the basis for mortar and concrete - the lime

Identify each enthalpy change by name and classify each change as exothermic or endothermic. 1. 1 mol NaCl (s) à 1 mol NaCl (l) 2. C4H10 O (l) à C4H10O (g) 3. H2O (g) à H2O (l) 4. 1 mol NaCl (s) + 3.

Calculate the number of atoms in a 1.26*103 g sample of silicon.