Answer:
There are alot of facts but here are a few
Explanation:
Atoms:
There are 3 parts to an atom
Protons have a positive electrical charge
Atoms are the smallest particles to make an element
Elements:
Hydrogen is the most common element in the world
An element is a substance that is made entirely from one type of atom.
An element is a substance that cannot be broken down into any other substance.
Given :
Mass of toluene: 55.0 g
Density of toluene: 0.87 g/mL
Now we know Volume = mass/density
Substituting these values we get
Volume = 55.0 g÷0.87 g/mL
Volume = 63.22 mL
The second one seems right
Answer:
<h2>A good example of a fixed pulley is a flag pole: When you pull down on the rope, the direction of force is redirected by the pulley, and you raise the flag. ... Examples of movable pulleys include construction cranes, modern elevators, and some types of weight lifting machines at the gym.</h2>
Answer:
nếu có 40g dung dịch NaOH 20% phairn dùng hết bao nhiêu gam dung dịch HCl 25% để trung hoà