Earth’s surface area is 5.10x10^8km², and its crust has amean thickness of 35 km and mean density of 2.8 g/cm3. Thetwo most abundant elements in the crust are oxygen (4.55x10^5g/metric ton, t) and silicon (2.72x10^5g/t), and the two rarest non-radioactive elements are ruthenium and rhodium, each with anabundance of 1104g/t. What is the total mass of each of theseelements in Earth’s crust (1 t =1000 kg)?

デジタル形式で段階的に解決 ありがとう!! SOLVE STEP BY STEP IN DIGITAL FORMAT Structure of Metal Materials: 8. A colleague calculated the density of iron with BCC structure using the following data of atomic radius equal to 1.24 Angstrom and atomic weight of 55.85 as follows: p = [(4 atoms / C. U.) x (55.85 g/atomic weight)/(atoms/atomic weight) / [2(1.24x108 cm)/√2]³ p = 68.8 g/cm³ Is the result obtained logical? Explain and justify your answer.

CH,2, Zn(Cu) Et,0 CH,l,, Zn(Cu) Et,0

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C₃₄H₃₂FeN₄O₄, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 30.5 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?

You have a 11.5 mg sample of blood that contains various proteins. Hemoglobin is the only protein in the sample containing Fe. Hemoglobin contains 3.83% by mass of a compound called heme (C34H32FEN.O4, MW = 616.49 g/mol). You find that your 11.5 mg blood sample contains 10.9 micrograms of Fe. What is the mass percent of hemoglobin in your protein sample?

In 1986 an electrical power plant in Taylorsville,Georgia, burned 8,376,726 tons of coal, a national record at the time.

(1. On the second floor of Kent Laboratory a chemistry student in 111B finds that 15.20 g of nitrogen will react with 17.37 g, 34.74 g, or 43.43 g of oxygen to form three different compounds: (a) Calculate the ratio of the mass of oxygen to the mass of nitrogen for each compound and (b) Explain briefly how the numbers in part (a) support the atomic theory.

A chardonnay wine is 13.5 percent by mass alcohol. If we consume 24 fluid oz of wine, and the density of the wine is 0.982 mg/mL, how much alcohol was consumed? 09.6 x 103 g alcohol O 301 g alcohol O 94 g alcohol O 106 g alcohol O 13.3 g alcohol

student found a bottle of unknown origin in the basement of an "CAUTION—contains С₁H₁O.” No other A old house. The bottle was labelled information was given, but inside the bottle were some white crystals. The student took the bottle to a chemistry laboratory, where she analyzed the crystals with the help of the laboratory staff. C₁2H₁6O reacted with Br₂ in CCl4 adding one mole of Br, and forming C₁₂H₁OB2₂. When a sample of C₁₂H₂O was reacted with O3 followed by Zn/H₂O, two different samples, J and K, were obtained. Compound J had a molecular formula of C.HgO₂, and its NMR is shown below. Compound K had a molecular formula of C₂H₂O, and it could be oxidized to compound L, with a molecular formula of C₂H₂O₂. The IR spectrum of L showed a very wide, strong band centred around 3000 cm*¹. The NMR spectrum of L showed only two different absorptions: a doublet (6H) at 0.9 ppm and a septet (1H) at 3.6 ppm. There was also a singlet (1H) off the scale at 11.8 ppm. students, deduce possible…

what is the unit, including its prefix, for 10^-6 of the derived unit for energy?