statement regarding kinetic energy is true? sc.7.P.112 A The kinetic energy of an object is A O calculated by multiplying mass times speed. B The objects at rest will have more В Icinotia onormu than the

Use the following information to answer questions 20 and 21. Assignment Booklet 4B Two cars, each with a mass of 1000 kg, are travelling in opposíte directionsn is car travelling to the right is travelling 30 m/s, and the car travelling to the lert is travelling 20 m/s. 1000 kg 30 m/s 1000 kg 20 m/s 20. What is the total momentum of the vehicles after they collicde? A. -50 000 kg-m/s B. 50 000 kg.m/s C. -10 000 kg.m/s D. 10 000 kg.m/s al ne 21. If the two vehicles collide and lock together, what is their velocity after the collision? A. -5 m/s Aon s quAua B. 5 m/s elg C. -10 m/s D. 10 m/s Return to page 70 of the Student Module Booklet and begin the Section 3 Review. os elomun ef et birov ort to solnied

3. Show the calculation of (1) the expected grams of alum (KAI(SO4)2 12 H2O) formed from the reaction of 1.4 grams of aluminum metal and then show the calculation of (2) the % yield if the actual yield of alum is 21.31 grams. Overall reaction is shown below: 2 Al + 2 KOH + 10 H2O + 4 H2SO4 →2 KAI(SO4)2 12 H2O + 3 H2(g)T

How to calculate the theoretical volume of cold air

Name PS. 3.5 Chemical Reactions 5. Aluminum was first produced in 1825 by Hans Oersted using the following reaction. KCI (s) K (s) AICI, (s) Al (s) 6. Silver is recovered from silver ore by converting the ore into silver sulfate which is then reacted with copper. Cu (s) Ag,S0, (aq) 7. Phosphoric acid is produced at a fertilizer plant. H,SO, (aq) + Ca (PO,)2 (s) 8. Bromine is commercially produced from MgBr, found in sea water. Cl, (g) MgBr, (aq) 9. Hydrogen sulfide (sour) gas from a wild natural gas well reacts with the lead (II) chromate pigment in paint on homes. H,S (g) PbCrO, (s) 10. Hydrogen sulfide gas from a wild sour natural gas well reacts with the silver in cutlery and ornaments in homes. H,S (g) Ag (s)

D Question 3 Observe these two structures and choose the correct statement Но Но A and B have the same boiling point O A is more commonly found in nature compared to B O A and B are isomers O A and B are PUFA « Previous

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The energy released from fission is about 200 MeV per fission event or 3.2-10-11 J per 235U nucleus. The fission of 1 g of 235U generates about 1 MW of thermal power; thus, a reactor that contains 1 kg of 235U fuel generates about 1 GW (109 W). If the reactor core is immersed in a heat bath containing 8.7.105 liters of water (12 m x 6 m x 12 m) initially at 25°C, how long will it take for the water to begin to boil off? Assume that the heat capacity of water is constant and that there is no heat lost from the reactor coolant to the surroundings.

Use the following balanced equation for problems 1–5. Molar masses are given below. 2 As 3 H2 2 AsH3 150. kcal + + molar masses 74.92 g 2.02 g 77.95 g How many moles of hydrogen are required to react with 25.00 moles of arsenic, As ? A. 75.00 mol B. 25.00 mol C. 16.67 mol D. 37.50 mol

The amount of heat in kJ required to convert 0.7 gal of liquid water to steam equal… ?