Answer:
D
Explanation:
Meteorologists use this symbol to show that the front is a stationary front.
Answer:
The sugar particles are so small that they have dissolved in the water, and can easily pass through the filter.
4. A
because PbCl2 is an ionic compound and it's solid, so it's a substance.
It cannot be mixture, because it's a pure molecule.
5. D
despite that both substances are gases, colorless they are different molecules, so they should have different either chemical and physical properties
6. C
this substance made from W atoms and others are made from molecules
I think its the mirror because condenser helps in allowing the amount of light to pass.
