3 .Identify unknown metals ions based on the results of the flame tests. PROBLEM QUESTION: What is the identity of the unknown ion? Lithium (Li) HYPOTHESIS: Choose from the following list of metallic ions and answer the above question in a complete sentence that incorporates the question: barium (Ba), strontium (Sr), lithium (Li), sodium (Na"), calcium (Ca"), copper (II) (Cu), or potassium (K).

Need help with homework

dies if needed for this question. The stopcock connecting a 3.13 L bulb containing methane gas at a pressure of 3.64 atm, and a 3.04 L bulb containing hydrogen gas at a pressure of 1.29 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is atm.

Solve correctly please. (Gpt/ai wrong answer not allowed)

020-012 x X Chemsto updates late werKs O Empower 2021 A educate.lindsay.k12.ca.us/iFrame aspx?iCtrl=STUDENT BASE HOME CONTROL Oy * Bookmarks DE IXL B Classes E Google Slides O Empower 2020 E E Google Docs Lindsay High School Physics Safety & Ski. E Guided practice 3 ( ENERGY LEVELS ELEMENTS 1-20 CAO NITODEN ONTOEN MEDN ALIMM SJOON 14 PHOPHOR CHLOFINE 17 ARGON 12 POTABE CALCUM 20 In an ionic bond, a metal atom loses electron(s) and a nonmetal gains them. What type of ion would Sulfur (S) become if it was bonded to a metal? O A. 1- ion O B. 1+ ion OC 2 ion O D. 2+ jon DELL F10 Hom F11 PrScr F12 tevsert F2 F3 F4 F8 @ %23 & フ 3 E T F G H K C B Mo Alt Ct Alt

▾ Part A As a liquid metal such as mercury is cooled below its freezing point, what happens to the average kinetic energy of the atoms? ○ The average kinetic energy decreases. ○ The average kinetic energy increases. ○ The average kinetic energy does not change. Submit Part B Request Answer As a liquid metal such as mercury is cooled below its freezing point, what happens to the average distance between the atoms? ○ The average distance between the atoms increases. ○ The average distance between the atoms decreases. ○ The average distance between the atoms does not change. Submit Request Answer

Archimedes tells us the lifting power of a balloon (how much mass it can lift) is equal to the difference between the mass of the balloon and the mass of the air it displaces. That is, if the balloon occupies the same volume as 10 kg of air, but the balloon only weighs 2 kg, then the gas density kg 0.090 3 m H, balloon can lift 8 kg. Airships have sometimes been filled with hydrogen (H,), but hydrogen is very flammable, and kg 0.18 Не m after the Hindenburg caught fire and crashed in 1937 with serious loss of life airships have nearly always been filled with helium (He) instead. kg 1.23 3 m' air Suppose a new airship Star of Balogna will have the shape of a cylinder 100. m long, with a radius of 15.0 m, and will weigh 9400. kg without any gas inside it. Suppose also the average passenger weighs 81 kg. Calculate how many passengers the Balogna could carry if it were filled with hydrogen, and also if it were filled with helium. Passengers with H,: Passengers with He:

Magnesium will burn in air to form both Mg3N2 and MgO. What mass of each product would be found if burning a 3.29 g sample of magnesium to completion produces a combined total of 5.09 g of the two products?