Answer:
Matter : Is any substance that has mass and volume and occupies space .
Matter is divided into three forms ;
- Solid
- Liquid
- Gas
Non- Matter is any substance that doesn't have mass and due to the fact that it doesn't have mass , it doesn't occupy any space but still exist.
Examples are
- The light from a torch
- The heat from a fire
- The sound of a police siren. and so on.
You cannot hold, taste, or smell these things because they are not matter they are forms of energy.
Explanation:
It is the liquid in humans stomachs that help break down food in the digestive system
All copper atoms have atomic number 29: all their nuclei contain 29 protons. But they also contain uncharged particles called neutrons. ... The two different kinds of atom are called isotopes of copper. The neutron has a mass very similar to that of the proton, so the two isotopes differ in mass.
Answer:
B
Explanation:
The mechanism of this process: the electrolytic cell converts the electrical energy to chemical energy, using external energy source.
Density is a value for mass, such as kg, divided by a value for volume, such as m3. Density is a physical property of a substance that represents the mass of that substance per unit volume. For gases we use the ideal gas equation to solve for density. We do as follows:
PV = nRT
PV = mRT / MM
Density = m/V = PMM / RT
From the given conditions of the nitrogen gas, we substitute the given values as follows:
Density = PMM / RT
Density = 1.5 atm ( 28.02 g / mol) / (0.08205 L-atm / mol-K) (290 K)
Density = 1.77 g/L
Therefore, the density of the gas is 1.77 g per liter.