Why is air a mixture? I do not understand why air is a mixture. can you guys write a brief explanation about why air is a mixture, whether it is homogeneous or heterogeneous, and how it can be separated.

If 0.40 mol of H₂ and 0.15 mol of O₂ were to react as completely as possible to produce H₂O, what mass of reactant would remain?

What are the similarities between an atom and an ion?

23g of sodium reacted with 35.5g of chlorine. Calculate the mass of the sodium chloride compound formed.

How much mass is equivalent to 1MJ of energy? (1 MJ=1*10^6 J) (The mass energy equivalence equation and speed of light are given below.) E=mc^2 C=3.0*10^8 m/s A. 3.3 * 10^-3 kg B. 1.1 * 10^-5 kg C. 1.1 * 10^-11kg D. 9.0*10^22kg

What is the best way to measure a reaction efficiency

You are measuring the mass of various shapes objecys and identifying their shaped ypu then record the qualitative and quanatitave data in a table is qualitataive wnd which is quatitaive

A positively charged wire is attracted to a negatively charged piece of metal. What force causes this?

Two identical atoms from Area B bond together. What type of bond will they most likely form A. Electrostatic B. Metallic C. Ionic D. Covalent

Which would be the best way to represent the concentration of a 1.75 M K2CrO4 solution? 1.75% K2CrO4 [K2CrO4] (K2CrO4) K2CrO4, [M] = 1.75

Consider the reaction C12H22O11 (s) + 12O2 (g) →12CO2 (g) + 11H2O (l) in which 10.0 g of sucrose, C12H22O11, was burned in a bomb calorimeter with a heat capacity of 7.50 kJ/∘C. The temperature increase inside the calorimeter was found to be 22.0 ∘C.