Valence electrons
How many valence electrons does HYDROGEN has?
1
How many types of chemical reactions are?
4
The tecnique used when you need to separate a liquid from a salt in a homogenous mix
Evaporation
Formula for the area of a circle
πr²
8=x+16
x=-8
How many valence electrons does OXYGEN has?
6
What chemical reaction is this?
A + B -----> AB
Synthesis
When you need to separate a solid from a liquid which separation technique you use?
Filtration
Formula for the area of a trapezium
(a+b)h/2
6x=40-4
How many valence electrons does NEON has?
8
What chemical reactions is this?
AB -------> A+B
Decomposition
When you need to separate a component in a mixture which shows magnetic properties which separation method you use?
Magnetic separation
Formula for the volume of a rectangular prism
lwh
length x width x height
-3x=42.5-27.5
x=-15
How many valence electrons does BROMINE has?
7
What is the formula for single replacement?
AB+C----->AC+B
When you separate liquids using their different boiling points you are using " "
Distillation
Formula for the volume of a pyramid
(AbH)1/3
(Area of the base x Height)1/3
A sphere has a volume of 113.04 cm3 find its radium
Take pi as 3.14
r=3
How many valence electrons does LEAD has?
4
What is the formula for double replacement reaction?
AB+CD-------->AC+BD
When you convert into a solid a component of the mixture to separate it is called
Precipitation
Formula for the area of a cone
(1/3)πr²h
3x-24=3y
6y=-5x+7
x=5
y=-3