A calculator .... that's the answer
a puddle evaporating = physical change
adding food coloring to water = chemical change
cutting an apple = physical change
denting a piece of metal = physical change
dry ice sublimating = I think is chemical change
iron rusting = chemical change
limewater and carbon dioxide forming chalk = chemical change
water boiling = physical change
vinegar and baking soda making bubbles = chemical change
paper burning = chemical change
Your welcome. I do sincerely believe that these are correct.
There are few reasons <span>why mercury is used in liquid barometer instead of water:
1. </span>Mercury (13.69 g/cm³) is more dense than water (1.00 g/cm³), so if we use water in barometar, <span>length of barometer would be much longer.</span><span>
2. </span><span>Mercury has lower vapor pressure than water.
3. </span>Mercury has lower freezing point (-38.83°C) than water (0°C)<span>.
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Chemical name of NH4Cl is
=》Ammonium chloride.
Chemical name of Na2CO3 is
=》Sodium carbonate
The kinetic theory of gases describes a gas as a large number of submicroscopic particles, all of which are in constant, rapid, random motion. The randomness arises from the particles' many collisions with each other and with the walls of the container.