At the bottom of the ocean, a rock has a mass 25 g. At sea level, the same rock will have a mass of:

B?

less than 25 g

more than 25 g

exactly 25 g

4Fe + 3O2  2Fe2O3 1. Classify the reaction that occurred between the iron and oxygen. 2. What evidence was there that a reaction took place?

Are 2 polar molecules strongly attracted to each other

What protects the plant embryo?

A sample of hydrated calcium sulfate has a mass of 20.88 g. After it is heated, it has a mass of 16.51 g. What is the percentage by mass of water in the hydrate

A new element - - quickly named Reachium by the scientific community - - is discovered. This element is found to have two isotopes. 86.4% of all Reachium atoms are Reachium-328 and 13.6% are Reachium-333. What is the atomic mass of this element?

How many grams of NH3 are needed to provide the same number of molecules as in 0.55 grams of SF6?

Round 129.752416 to the requested number of significant figure a. 3 significant figures c. 6 significant figures_22 b. 4 significant figures d. 7 significant figures

What is the [oh-] in a sample of lime juice with a ph of 2.0?

What is the chemical name for nicl2?

How to determine the formula is you know g and L?