Is the substance described in the chart above held together by a metallic, covalent, or ionic bonds? Explain.

Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

What happens to the average kinetic energy of a gas when the particles of the gas collide against each other at a constant temperature and volume? explain your answer.