Some of the oldest rocks ever found have been estimated to be about 3.5 billion years old. Is it likely that these rocks were pr
esent when Earth was first formed? a. No, rock material is constantly recycled on Earth as rock is melted into magma.
b. Yes, most of the rocks on Earth can be dated back to the time when Earth was first formed.
c. No, this rock is probably just a sedimentary rock that was formed by much younger igneous rocks.
d. No, it is likely that any rocks older than a few hundred years are meteorites from outer space.
You have to rewrite the ideal gas law in terms of n. (n=PV/RT) you are given V=0.53L, T=329K, and P=3.0atm, R is a constant so you already know that R=0.08206atmL/molK. n=(3.0atmx0.53L)/(0.08206atmL/molKx329K) n=0.0589mol gas
The last step is to calculate the percent by mass of each element in ammonium nitrate (NH4NO3). The masses of the elements in one mole of the compound are: mass N = 28.0 g mass H = 4.0 g mass O = 48.0 g The molar mass of the compound is 80.0 g/mol. What is the mass of one mole of the compound? 80.0g