Phosphorus-24 has a half-life of 14.3 days. What percent of phosphorus-24 is left after 144 hours?

Citric acid has a pH between 1 and 3. It is considered to be a

Which resources MAY be used by autotrophs to make their food? 1. oxygen 2. glucose 3. soil 4. carbon dioxide 5. hydrogen sulfide (A) 1 and 2 (B) 2 and 3 (C) 3 and 4 (D) 4 and 5

Why is there a higher rate of skin cancer in Australia than in other parts of the world?

A neutral salt is formed by which type of reaction? A. strong acid-weak base B. strong acid-strong base C. weak acid-strong base D. weak acid-weak base

How much heat is absorbed when 30.00 g of C (s) reacts in the presence of excess SO2 (g) to produce CS2 (l) and CO (g) according to the following chemical equation? 5 C (s) + 2 SO2 (g) → CS2 (l) + 4 CO (g) ΔH° = + 239.9 kJ

How do aqueous solutions of ionic and molecular compounds differ

Which reaction represents an unbalanced neutralization reaction? Na + H2O NaOH + H2 HNO3 + NaOH NaNO3 + H2O NaNO3 + H2O HNO3 + NaOH H2O H2 + O2

How does the health of polar bears indicate the health of the environment

Our body needs iron. Certain foods are rich in iron and iron tablets are usually recommended by doctors. but neither the food nor tablets are hard like iron? Why?

Under which conditions are gases most soluble in water?