Changes in matter occur every day. There are two types of ways matter can be altered; physically and chemically. Physical changes do not change the composition of the matter while chemical changes occur when one or more substances turn into a completely new substance. Physical changes can be seen through an altering of the substances physical property. A substances physical property is observed and measured without changing the composition of the subject. Descriptive words that would help to identify a substance’s physical property include hard, soft, brittle, flexible, heavy, and light just to name a few. Let’s say you’re eating, throughout the day your stomach starts to growl that is what happens when your stomach is digesting your food. Digestion is an example of chemical change. Chemical change happens every day and more than half the time we don’t realize it whether it’s metal starting to rust, or our food starting to rot. Physical change can happen when your popsicle starts to melt, or your water starting starting to boil. These are examples of physical change.
Answer:
52.36 grams of water was produced when 32 grams of propane was burned in excess of oxygen gas.
Explanation:
Moles of propane =
According to reaction, 1 mole of propane gives 4 moles of water.
Then 0.7273 moles of propane will give:
of water
Mass of 2.909 moles of water:
= 2.909 mol × 18 g/mol = 52.36 g
52.36 grams of water was produced when 32 grams of propane was burned in excess of oxygen gas.
<span>Answer: at 0.01 °C and 0.0060 atm the three phases (solid, liquid and gas)
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</span><span>Explanation:
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</span><span>1) Water at 0.0060 atm and 0.01° C is at its triple point.
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2) The triple point is the point in the phase diagram at which the three physical states coexist: gas, liquid and solid.
3) That means that water can freeze and boil at the same time. In fact they can happen any of the six changes of phase: freezing (liquid to solid), melting (solid to liquid), evaporation (liquid to gas), condensation (gas to liquid), sublimation (solid to gas), and deposition (gas to solid).
The phase diagram is unique for any substance, meaning that it is different for different substances: the normal boiling and melting points are different.
Answer:
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