Blast furnaces give off many unpleasant and unhealthy gases. If the total air pressure is 1.02 atm, the partial pressure of carbon dioxide is 0.07 ATM, and the partial pressure of hydrogen sulfide is 0.04 atm, what is the partial pressure of the remaining air?

We're told oxygen is the most common element in the Earth's solid crust. But how much oxygen is there? Let's compare to the amount of oxygen in the Earth's atmosphere, like this: • The most common minerals in the Earth's crust are feldspars, and anorthite (CaAl,Si₂O) is a typical feldspar. Let's assume the entire crust is made of anorthite, with a density of 2.8 g/cm³. • The radius of the Earth is 6371. km and let's say the crust is the upper 75.0 km of it. • Let's model the Earth's atmosphere as a layer on top of the Earth about 100. km thick with an average density of 0.99 g/m³, and which is 23.1% oxygen by mass. Use this information to calculate the ratio of the mass of oxygen in the Earth's atmosphere to the mass of oxygen in the Earth's crust. Round your answer to 2 significant digits.

a sample of dolomitic limestone containing only CaCO3 and MgCO3 was analyzed a) when a 0.2800-gram sample of this limestone was decomposed by heating, 75.o milliliters of CO2 at 750. mm Hg and 20°C were evolved. How many grams of CO2 were produced? b) write equations for the decomposition of both carbonates described above.  c) It was also determined that the initial sample contained 0.0448-gram of calcium. What percent of the limestone by mass was CaCO3? d) How many grams of the magnesium-containing product were present in the sample in a. after it had been heated?

What is the coordination number (CN) for each type of hole (cubic, octahedral,tetrahedral)