Answer:
causes a substance to change from a liquid to a solid.
Explanation:
Methane CH4
ethane C2H6
propane C3H8
Butane C4H10
pentane C5H12
Combustion=heat and light
decomposition=taking something away
single means one element changes
and double means two elements change l.
Answer:
A. Yes, the substance must be water.
Explanation:
The density of a substance is unique to it. Density is defined the as the amount of substance contained per volume.
One of the ways of identifying a substance is to determine its density. Every matter is known to have their own specific densities. This makes them different from other substances. The density of gold is unique to it and it differs from that of silver.
In fact, water has density of 1.00gcm⁻³. Experimental errors and some little factors must have altered our expected figure. This a case of precision and accuracy in the experiment.