The half-life of a certain element is 100 days. How many half-lives will it be before only one-eighth of this element remains?

A 43.56 gram sample of iron is heated in the presence of excess sulfur. A metal sulfide is formed with a mass of 81.08 g. Determine the empirical formula of the metal sulfide.

What is the temperature at the plane where the wood meets the styrofoam?

The pH of a substance is defined as

7. Which motion causes night and day on Earth? * O A the Sun's motion around its axis B Earth's motion around its axis O C Earth's motion around the Sun O D the Moon's motion around Earth

Can decomposition determine the property of a substance

Draw the condensed structural formula for the ammonium salt formed when lidocaine reacts with hcl.

The half-life of a certain element is 100 days. How many half-lives will it be before only one-eighth of this element remains?

If the reactants of a reaction are HCI and NaOH, what could be a product? A. NO2, B. HCIO4, C. NaCl, D. Na2CO3

Why is scientific notation useful?

Hydrochloric acid, HCl, reacts with solid NaOH. What are the products of this chemical reaction?