A radioactive isotope has a half-life of 3 hours. If a scientist has 30 grams of the isotope, how much is left after 15 hours

In what way can charge be like glue?

Classify the following compounds as having covalent or ionic bondsa. dinitrogen trioxideb. carbon dioxidec. calcium chlorided. magnesium nitridee. sodium bromidef. aluminum oxide

Which nuclide is most likely to be radioactive and synthetic 24/12 Mg 237/93Mg 195/78Mg 230/84Mg

The vapor pressure of chloroform is 173.11 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in chloroform is aspirin. Calculate the vapor pressure of the solution at 25 °C when 9.322 grams of aspirin, C9H8O4 (180.

How do hydrocarbons differ in structure from carbohydrates.

A intramuscular medication is given at 5.00mg/kg of body weight. What is the dose in grams for a 180-lb patient?

Nuclear fusion is the source of energy for stars. Besides hydrogen, which other element is most likely also common in stars?

Since the early 2000s, careers in the field of genetics have grown at a rapid pace. Which of these is a probable cause for this explosion of available and expanding jobs?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?