Because distances Between large objects in space are not VERY convenient
Answer:
Physical change because even though gas formation was observed, the water was undergoing a state change, which means that its original properties are preserved.
Explanation:
Water boiling results in the physical state changing from solid to gaseous water. This moment can be called boiling or vaporizing, which is the change from liquid to gaseous state by heating water. Thus, the "Boiling Point" (PE) of a substance is the temperature at which that substance changes from liquid to gaseous state and, in the case of water, is 100 ° C. When the water reaches this temperature its physical change occurs because, despite the formation of gas, the water was undergoing a state change, which means that its original properties are preserved.
Answer:
162 grams
Explanation:
To find the mass from molar mass and moles, you simply multiply.
You get (18.0g)x(9.00 moles)
A physical change is when a substance experiences a change in its physical characteristics.
For instance, cutting a diamond or a piece of glass
A chemical transformation is one in which one or more new compounds are created.
Iron rusting, for instance.
Both reversible and irreversible physical change are possible.
On the other hand, chemical change is a change that can never be reversed.
a) Electrolysis of molten MgCl2 involves chemical change since new materials are created and MgCl2 cannot be recovered.
The process of electrolysis involves passing an electric current through a substance to cause a chemical change.
Refer to this website to learn more about reversible changes: brainly.com/question/14831707
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An anion is an ion with a negative charge. The minus sign, when attached to the end of an ionic compound, indicates that this has a negative charge, while a plus sign indicates a positive charge.
O2- is the only compound listed that satisfied this. It is the anion.
Answer is 02-
