Because the building is wired for electricity?
To carry electricity , and people use copper wire and not , e.g. i don't know,plastic? because copper is a good conductor of electricity
To keep heat in - and cold out. Many buildings are poorly insulated ( the 'standard' house-brick is the main culprit. This lets heat escape through the walls (and roofs) of buildings. Insulation traps the heat inside.
Copper sulfate (CuSO4) contain 3 chemical elements.
many, but not all, copper ore deposits also contain gold
Because copper is considered an element, and because elements do not include other elements, copper only contains copper.
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(Cu4O2) contain two elements: copper and oxygen.
Many alloys contain two elements, for example Brass is copper + zinc, Bronze is copper + tin.
Copper is important to Canada because of what it's used for, it is used on many things, buildings, vehicles, and high technology matearials
There may be many that contain copper and oxygen in addition to other elements. The two that contain only copper and oxygen are copper (I) oxide and copper (II) oxide.
Copper can be found naturally in copper deposits/veins in the Earth's crust and in molecules that contain other atoms. Copper is used for many purposes by humans, such as jewellery, the creation of bronze (copper+tin), the creation of metal alloys, and many other uses.
Copper nitrate molecule contain nine atoms.