Every cell in an organism has the same number of chromosomes, except: A.)Skin cells
B.)Neurons
C.)White blood cells
D.)Reproductive cells

If you burn 10 kilograms of wood in a fire (combustion) what is the weight of the products after the fire has finished burning the wood?

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

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?