Which Element (s) have 3 Energy Levels? (select all that apply)

Sodium (Na)

Calcium (Ca)

Tin (Sn)

Neon (Ne)

Phosphorus (P)

Sulfur (S)

Lithium (Li)

Yttrium (Y)

Argon (Ar)

What happens when two atoms form a chemical bond? A) Two atoms fuse together to form a chemical bondB) The atoms share or transfer electronsC) A chemical bond forms when two atoms transfer or share protons to achieve a stable nucleusD) Like charges

What is the ∆G for the following reaction under standard conditions (T = 298 K) for the formation of NH4NO3 (s) ? 2NH3 (g) + 2O2 (g) NH4NO3 (s) + H2O (l) Given: NH4NO3 (s) : ∆Hf = - 365.56 kJ ∆Sf = 151.08 J/K. NH3 (g) : ∆Hf = - 46.11 kJ ∆Sf = 192.

How many grams of Hydrogen (H) would need to react with 190 grams of Fluorine (F) to make 200 grams of HF (Hydrofluoric Acid) ? Question 6 options: 200 20 10 5

An equilibrium mixture of O2, SO2 and SO3 contains equal concentrations of SO2 and SO3. Calculate the concentration of O2 if Kc = 270 for the reaction: 2 SO2 (g) + O2 (g) - 2 SO3 (0)

What is AGsystem for the system that is described by the following data? AHsystem = - 232 kJ, T = 293 K, ASsystem = 195 J/K AGsystem = AHsystem - TASsystem O-289 kJ O - 175 kJ O 256 kJ O 56,903 kJ

77.60 ml of. 210 M NaOH are required to neutralize 25.05 ml ofH2SO4 solution in a titrationexperiment. Calculate the molarity and normality of theH2SO4 solution.

A 25.0 g bold made of an alloy absorbed 250 J of heat as its temperature changed from 25.0 °C to 78.0 °C. What is the specific heat of the alloy?

How is an areas topography determined?

How to put a solution back into solution when it comes out of solution chemistry?

When the isotonic saline solution described in part A is connected to an unknown solution via a semipermeable membrane, the unknown solution level drops.