Answer:
Brightness. Two characteristics define brightness: luminosity and magnitude. ...
Color. A star's color depends on its surface temperature. ...
Surface Temperature. ...
Size. ...
Mass.
Explanation:
there
Answer:
From the water to the dry ice
Explanation:
The energy is transferred from the water to the dry ice because the water is warmer than the dry ice.
The molar mass of NaOH is 40 g/mol.
The number of moles of NaOH is equal to the ratio of its mass to molar mass.
The number of moles of NaOH =
40g/mol
40g
=1mol
The molarity of NaOH solution is the ratio of number of moles of NaOH to total volume of solution in L.
M=
1L
1mol
=1M
Answer:
lost electrons
Explanation:
A positively charged atom has lost electrons because if an atom loses electrons it bring the charge above 0 and a negatively charged atom would have gained electrons because the overall charge is negative so more electrons would be added.
Answer:
- is reused and recycled
- can dissolve more substances than any other liquid
Explanation:
Earth water is reused and recycles in the form of the water cycle (hydrological cycle). In this cycle, water from the earth surface evaporates in the atmosphere, cool and condense into cloud or snow and fall to the earth surface.
As a universal solvent, water can dissolve more substances than any other liquid. The polar arrangement of oxygen and hydrogen atom in the water molecules makes it excellent salt.
On Earth, ~2.5% is a freshwater whereas 97.5% is salt water. The pH of water differs for surface and salt water, i.e. neutral to alkaline respectively. Water molecules attract to other water molecules better than the other substances. Therefore, other options are incorrect.