1. Rocks are the toughest thing on earth that there is no single element could break them through?
2. The hardness of a rock decreases due to excessive
exposure in a changing weather temperature.​

If 3.00 g of titanium metal is reacted with 6.00 g of chlorine gas, cl2, to form 7.7 g of titanium (iv) chloride in a combination reaction, what is the percent yield of the product?

How are isotopes of the same chemical element alike? how are they different?

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.