What is the lowest energy that an electron can have in a hydrogen atom? A. 0 B. + 1.634 x 10 to the power of -18 J C. + 2.179 x 10 to the power of -18 J D. -5.488 x 10 to the power of -19 J E. - 2.179 x 10 to the power of - 18 J
Which of the following metals would be the least safe to drop in water? Why? A. lithium B. magnesium C. iron D. potassium E. aluminum
What elements are paramagnetic in the second row of the periodic table?
The Ksp for Fe(OH)3 is 4 x 10-38. What is the maximum concentration of Fe+3 in neutral (pH=7) water? The solubility of NaCl is 35.7 grams per 100mL at 20°C. What is the Ksp for NaCl?
The following is best described by which type of reaction? HCl + NaOH --> NaCl = H2O A. decomposition B. acid-base neutralization C. single displacement D.redox E. double displacement (metathetical)
Draw Lewis Structure for CaO
Lewis structure for potassium bromide?
What is the VSEPR notation of the following: A. COCl2 B. ClO2- C. PH3
Precipitation of inorganic (metals) in a water treatment system?
Please help and explain to me clearly......a wastewater contains various cations such as Na, K, Mg, Ca, Ba, Fe, Cu, Zn, and Al; the pH of the wastewater is approx. 6.0 To that wastewater is added H3PO4 (phosphoric acid) in an approximate dose of .00034 gals of H3PO4 per gallon of wastewater. I'm less concerned about the st ...continues
Calculate how much energy a wind turbine produces in a year.
Assume a wind turbine with a hub 50 meters above the ground, a rotor diameter of 40 meters and a wind-conversion efficiency of 25 percent. The turbine operates in an area with an average wind-power density of 550 watts/sq meter at 50 meters altitude. How much electricity (kwH) can the turbine generate per year? Wind densities ...continues
