The answer is C which is PbSo
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Seeing signs of a chemical reaction does not always mean that a reaction is happening. For example, a gas (water vapor) is given off when water boils. ... You can tell that it is a physical change because water vapor can condense to form liquid water. In a chemical change, a new substance must be produced.
Answer:
What element is this. Would you mind inserting a picture or naming the element in the comments section
Supplementary angles add up to 180, so
6x+60+90 = 180 and solve for x
6x= 30
x=5
