Write the half-reactions and balance the redox equations 1. Cr(s) + Ag+ → Cr+3 + Ag(s) 2. NO3 + Cu(s) → N2O4(g) + Cu+2 B. H2O2 + Ce4+ → O2(g) + Ce+3 1. UO2+2 + Zn(s) → U+4 + Zn+2 5. IO3 +I-→ I2(s) S. Mn04 + Mn+2 + OH-→ MnO2(s) (Hint: This is a basic solutior

NHẠNO3 MgSO4 [1] Mass of salt (g) 1.968 1.981 [2] Volume of DI water (mL) 50.0 50.0 0.039 0.0396 Mass of DI water (g) [3] Temperature of DI water (°C) 22.5 22.5 [4] Temperature of mixture after dissolution (°C) 19.5 27.1 3 4.6 Temperature difference (°C) [5] Total mass in reaction (g) [6] Enthalpy of solution AHsolution (cal/mol)

A student dissolves 106 g of compound Q in one liter of hot water. All of compound Q dissolves.  The student then cools the water to room temperature.  At room temperature, 52 g of compound Q dissolves in one liter of water.  How many grams of compound Q will recrystallize in the room temperature water? Include the unit in your answer.

Which molecules are enantiomers? Which molecules are the same? (A). H Br

Evaluate the product. (7.61×10^9)(4.46×10^3)

QUESTION 4 Rank the alkenes show in order of stability with 1 being most stable and 3 being least stable. ch8-d1-q3+4+5(2).jpg VA ✓ B

Part G Write balanced complete ionic equation for NazPO4 (aq) + CaCl2 (aq) → Ca3(PO4)2 (s) + NaCl(aq). Express your answer as a chemical equation. Identify all of the phases in your answer.

Balence the equation

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: