Draw a reasonable Lewis dot structure for ONC, including the formal charges (N.B. N is the central atom). O, N, and C are in groups 6, 5, and 4 and their atomic numbers are 8, 7, and 6. Draw a reasonable Lewis dot structure for CIO, including the formal charges (N.B. Cl is the central atom). Cl and O are in groups 7 and 6 and their atomic numbers are 17 and 8. Draw a reasonable Lewis dot structure for XeO₂F, including the formal charges (N.B. Xe is the central atom). Xe, O, and F are in groups 8, 6, and 7 and their atomic numbers are 54, 8, and 9.

Be sure to answer all parts. If it costs $155 per ton of metal to produce magnesium by the electrolysis of molten magnesium chloride, what is the cost (in dollars) of the electricity necessary to produce the following amounts of metals? Enter your answers in scientific notation. (a) 23.0 tons of aluminum: x 10 (b) 36.0 tons of sodium: x 10 (c) 62.0 tons of calcium: x 10 dollars dollars dollars

Consider the two spheres shown here, one made of silver andthe other of aluminum. (a) What is the mass of each spherein kg? (b) The force of gravity acting on an object is F = mg,where m is the mass of an object and g is the acceleration ofgravity (9.8 m/s2). How much work do you do on each sphereit you raise it from the floor to a height of 2.2 m? (c) Does theact of lifting the sphere off the ground increase the potentialenergy of the aluminum sphere by a larger, smaller, orsame amount as the silver sphere? (d) If you release thespheres simultaneously, they will have the same velocitywhen they hit the ground. Will they have the same kineticenergy? If not, which sphere will have more kinetic energy?[Section 1.4]

The coldest temperature ever recorded on Earth was−128.6°F (recorded at Vostok Station, Antarctica, onJuly 21, 1983). Express this temperature in degreesCelsius and in kelvins.a) −89.2°C, −89.2 K d) −173.9°C, 99.3 Kb) −289.1°C, −15.9 K e) −7.0°C, 266.2 Kc) −89.2°C, 183.9 K

A stalk of celery has a caloric content (fuel value) of 9.0 kcal.If 1.0 kcal is provided by fat and there is very little protein, estimatethe number of grams of carbohydrate and fat in the celery.(a) 2 g carbohydrate and 0.1 g fat (b) 2 g carbohydrate and1 g fat (c) 1 g carbohydrate and 2 g fat (d) 32 g carbohydrateand 10 g fat

Give correct handwritten answer

(a) What is the volume (in km³) of Avogadro's number of sand grains if each grain is a cube and has sides that are 1.6 mm long? 2470000 ✔ km³ (b) How many kilometers of beaches in length would this cover if the beach averages 123 m in width and 12.1 m in depth? Neglect air spaces between grains. 1840 km

2. A closed system is one in which (a) heat and work cross the boundary of the system, but the mass of the working substance does not (b) mass of working substance crosses the boundary of the system but the heat and work do not (c) both the heat and work as well as mass of the working substances cross the boundary of the system (d) neither the heat and work nor the mass of the working substances cross the boundary of the system. (c) none of the above. Go to PCsettinot DELL F2 F3 F4 F5 FO F7 F8 F9 F10 F11 F12 PriScr Arysert Delete の 41 %23 Backs 4 フ R U P: DI F 1 Η1

Object A has a charge of 3.6 × 10 °C and object B has a charge of 4.7 × 10 °C. What is the electric force between the two objects when they are 0.7 meters away?

Phosphoric acid, which is commonly used as rust inhibitor, food additive and etching agent for dental and orthopedic use, can be synthesized using a two-step thermal process. In the first step, phosphorus and oxygen react to form diphosphorus pentoxide: PĄ()+50,(0)→2P,0;(9) In the second step, diphosphorus pentoxide and water react to form phosphoric acid: P,0,(9)+3 H,O(1)→2 H;PO,(1) Write the net chemical equation for the production of phosphoric acid from phosphorus, oxygen and water. Be sure your equation is balanced.