Answer:
The first row fits in period 2
The second row fits in period 3
Explanation:
Elements arranged vertically in the periodic table in groups that share similar chemical properties.
Elements are also organized horizontally in rows or periods
The length of each period is determined by the number of electrons that can occupy the sublevels being filled in that period.
A poor ratio of Oxygen will cause incomplete combustion and the consequent deposit of carbon.
Answer:
The volume is 2238,6 L
Explanation:
We use the formula PV=nRT. The conditions STP are: 1 atm of pressure and 273K of temperature:
PV=nRT ---> V=(nRT)/P
V= 100 mol x 0,082 l atm/K mol x 273K/ 1 atm
<em>V=2238, 6L</em>
Answer:
a straight neck flask to allow air to get in
Explanation:
I took the test eWe
Answer:
D) There must be equal number of atoms of each elements on both sides of equation.
Explanation:
The balancing equation must have equal number of atoms of each elements on both sides of equation.
The balance equation shoes mass is conserved thus followed the law of conservation of mas.
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
