A substance is on its fifth half-life. Which approximates the percentages of radioactive and stable isotopes, respectively? 96.9%; 3.1% 3.1%; 96.9% 12.5%; 87.5% 87.5%; 12.5% Need an answer fast

Why isn't a different base broth required for each decarboxylase test?

Gas is squeezed into a small container is it compressibility or heat of combustion

A force of 250 N is applied to an object that accelerates at a rate of 5 m/sec2. What is the mass of the object? A) 5 m/sec2 B) 50 kg C) 1250 N D) 0.02 kg

Which statement is NOT stated in the cell theory? All organisms are composed of cells. Cells are alive and the basic living units of orgfanization in all organisms, All cells come from other cells. Cells are created in scientific labratories.

Identify reactants and products in a chemical reaction

If one object has more mass than another then it weighs more or less than the other object?

What is most believed by most scientists about the age of our solar system.

The water level in a graduated cylinder stands at 20.0 ml before and at 26.2 ml after a 16.74 g metal sample is lowered into the cylinder. what is the density of the sample. what metal is the sample most likely to be

An electrolyte is a substance that will conduct electricity when dissolved in water. a substance that conducts electricity well is a strong electrolyte. a substance that conducts electricity poorly is a weak electrolyte.

Energy is required to produce a chemical change during (1) chromatography (2) electrolysis (3) boiling (4) melting