Lost the three layers of The earth based on their composition

The atomic number of sodium (Na) is 11. This is also the number of which of the following? atomic mass ionic charge neutrons protons

What is the molar mass of potassium

A reaction occurs in a calorimeter, resulting in the starting and final temperatures shown below. What can you say about the reaction and the enthalpy change (ΔH) during the reaction? Starting: 21.0 C Final: 38.8 C

Why does a candle relight if a match is held above the wick just after the flame is blown out?

How many valence electrons are represented in the following electron configuration? 1s22s22p5

What mass of methanol is combusted in a reaction that produces 112 L of Co2 at STP? A. 112g B. 81.6g C. 64.1g D. 160g

How many moles of O2 are needed to react with 24 moles of C2H6?

The Second Law of Thermodynamics states that the total amount of entropy in the universe is

Which force acts an an object to move it from rest or a constant, straight-line motion? A-balanced B-unbalanced C-inertial D-along a straight line

When preparing a buret for use in lab, the buret must always be cleaned thoroughly. prior to being filled with solution, the buret is rinsed one last time. what is the buret rinsed with, and why?