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In electrolysis, water is separated into two substances; hydrogen and oxygen. Is this a physical or chemical change?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
How are a mixture and a compound different?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
Which kind of reaction releases energy and heats up?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
Which kind of reaction absorbs heat and cools down?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
A change in state is a(n)
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
When do you need to use a graduated cylinder to find density?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
If steel has a density of 7.8 g/mL and silver has a density of 10.5, if you had the same volume of each substance, which would have a greater mass?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
If you have an unknown liquid, how could you find out if it is water?
A compound is held together by chemical bonds
exothermic
endothermic
Chemical because two new substances were created.
When the object has an irregular shape
physical change
Determine its density
Silver, because silver has a greater density.
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