To find the number of chalk molecules it takes to write your name on the board, first measure the length of your name in centimeters. Next, estimate the thickness of the chalk line you would draw, then calculate the volume of chalk used by multiplying the length by the thickness. Finally, divide this volume by the volume of a single chalk molecule to determine the total number of molecules needed. You may need to use the density of chalk and the molecular weight to find the volume of one molecule.
They come in differing sizes.
bullentin board is 3 feet, chalk board is 4 feet,
For his work in theoretical physics, the primary took that Albert Einstein used was his brain. No doubt he also used pen or pencil and paper, and occasionally chalk and a chalk board.
For his work in theoretical physics, the primary took that Albert Einstein used was his brain. No doubt he also used pen or pencil and paper, and occasionally chalk and a chalk board.
supposedly came from the practice of writing what you owed at a pub on a chalkboard; later game scores (e.g., for darts) were also chalked up on a board.
Chalk is Calcium Carbonate, aka CaCO3, so it's only one substance.
near a chalk board
Chalk
The Luhya translation of the English words 'chalk board' is "lisisi lie ichoka".
A compound word with chalk is chalkboard.
5x2x1.5
The molecular weight(M) of chalk(CaCO3) = (40+12+48)g/mol =100g/mol and teaspoon (m)= 4.93g We know, n=m/M So, n= (4.93/100) mol = .0493 mol To find out number of molecules we use, N= n x NA equation. N= .0493 mol x 6.02 x 1023 molecules/mol =2.968 x 1022 molecules Therefore, there are 2.968 x 1022 molecules in a teaspoon of chalk.
a chalk board
maybe it might be near the chalk on the board
You can use it in homemade toothpaste recipes in place of baking soda. Also used in the construction trade when 'snapping' a chalk line on a board, etc.
It would be an insulator- chalk board erasers normally consist of two parts, a wooden handle and a soft pad that wipes off the chalk from the board. Neither of these parts are conductors of electricity.
A chemical reaction is nothing but the conversion of the reactant molecules into product molecules. By increasing the surface area of the reactants more number of reactant molecules are exposed which eventually increases the rate of the reaction...for example, powdered chalk piece dissolves faster in water than a piece of chalk.