Answer: An element os made up of one kind of atom.
Explanation: Dalton's concept states that all atoms of an element is identical.
Answer:
Percent composition tells you which types of atoms (elements) are present in a molecule and their levels. Percent composition can also tell you about the different elements present in an ionic compound as well.
Answer:
cylinder A has a higher density then cylinder B or more accurately the liquid in cylinder A is denser then the liquid in the second tube.
Explanation:
"Denser" simply means more matter is contained in the same space for example say you fill a tank with helium and another tank with water. Although they are the same size one will weigh much more because their is more particles or "stuff" inside the same area this can be because of a few things one it can be because the atoms or elements that compose the substance are heavier containing more electrons and protons in their orbit. or the molecular structure is more compact like a chicken wire fence has more wire in it then a barbed wire wire fence covering the same area because of the grid of wire in the middle.
Know what decomposition is. The compound is "breaking down".
Di means 2 while, Tetra means 4.
First, we will simply follow the instructions and break down the compound as so: The decomposition of dinitrogen tetraoxide into nitrogen gas and oxygen gas
*Take into account that diatomic molecules (HNOFClBRI) will always have a subscript of 2
N₂O₄⇒N₂+O₂
After breaking down the compound, we must now balance the equation.
To balance the equation, we must make sure that each element has the same amount of atoms.
Starting with compound at the left of the yield: N=2 and O=4
But, at the right of the yield: N=2 and O=2
We have now discovered that the oxygen gas is not balanced throughout the equation.
N₂O₄⇒N₂+2O₂
*We simply multiply the oxygen gas on the right of the equation by 2
After multiplying, on the right side of the equation, O=4. We now have a balanced equation because all elements have the same amount of atoms on each side.
So your final answer for this balanced decomposition chemical equation is: N₂O₄⇒N₂+O₂
