That is, temperature is a measure of how hot or cold a substance is. In contrast, the total energy of motion in the particles of a substance is called thermal energy. Temperature is one of the most important factors affecting the weather. Air temperature is usually measured with a thermometer.
Answer:
he free energy goes down as the water freezes. Here are the important terms: The energy of the interactions between the water molecules goes down as they line up in the stable ice positions. This lost energy flows out into the environment as heat, increasing the entropy of
Explanation:When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice. ... As the liquid cools down, the amount of potential energy is reduced and the molecules start to move slower. When the water temperature reaches around 0°C, the molecules stick together and form a solid – ice
The equation for finding how many moles are in a substance is
moles = mass / relative formula mass,
where mass is measured in g.
The r.f.m. (relative formula mass) is found by adding together all of the atomic masses of the elements in a substance.
e.g. CO2 (carbon dioxide) has 1 atom of carbon and two atoms of oxygen.
The relative atomic mass of carbon is approximately 12.
The relative atomic mass of oxygen is approximately 16.
12 + (2 x 16) = 44
The r.f.m. of carbon dioxide is 44.
You would then divide the mass of the substance (how much there is of it) by its r.f.m. to find the mole number.
Answer is D. Beaker can ONLY provide approximate volume of a liquid.
Answer B is incorrect. Graduated cylinder provides an accurate volume of a liquid, not a beaker.
Answer:
protons.......................
