Which of these is a trace fossil? an oyster shell

an ancient fern leaf

an ancient bird nest

a dinosaur's jaw bone

About 70 percent of the earth's surface is water-covered, and about 96.5 percent of all earth's water is salt water. identify the watery feature on earth that is made of freshwater rather than salt water. a) bay b) glacier c) ocean d) sea it is not incomplete this is the true question

Suppose that during that icy hot lab 65,000 j of energy were transferred to 450 g of water at 20°c what would have have been the final temperature of the water

If anyone would be able to me out with these three questions it would be these are from the chem 2202 course.