Stuff Thats A Little Important

Question 1

Define diffusion

Answer 1

The net movement of particles from an area of high concentration to low
Concentration down a concentration gradient

Question 2

What is the equation for moles , mr and mass

Answer 2

Mass = moles x mr

Question 3

What is empirical formula

Answer 3

The simplest whole number ratio of elements in a molecule

Question 4

Empirical question :

I have 10g of hydrocarbon that contains 8g of carbon - whats the empirical formula

Answer 4

1) mass of hydrogen - 10-8=2 2g of h
2)find moles of each by dividing mass of element present by atomic mass
Carbon= 8/12=0.67 Hydrogen = 2/1=2
3)divide each by the smaller number
0.67/0.67 =1 and 2/0.67= 3
4) ratio is 1:3