A certain sample of element X contains 60% of 69X and 40% of 71X. What is the average atomic mass of element X in this sample? Report your answer to the nearest tenth.

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.

Read the claim. breakfast is an important meal. it jump starts the body’s process of using calories to break down food. appetite can decrease with age, but going too long without eating causes metabolism to slow down. current research shows that incorporating legumes such as lentils and chickpeas into meals boosts metabolism for twenty-four hours. who might benefit from this claim? people who have a fast metabolism stores that sell exercise equipment people who take vitamin supplements grocery stores that sell legumes

What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?