What happens to the mass of a sample containing a radioactive element during its half-life?

A. The mass decreases by half. B. The amount of mass is doubled. C. Eventually there is no mass at all. D. The mass remains the same.

If 3.52 L of nitrogen gas and 2.75 L of hydrogen gas were allowed to react, how many litres of ammonia gas could form? Assume all gases are at the same temperature and pressure.

Which cell copies its dna

The outer planets-Jupiter, Saturn, Uranus, and Neptune-are made up of which gases? 1. hydrogen, carbon dioxide, and ammonia 2. methane, helium, and ammonia 3. methane, carbon dioxide, and ammonia 4. hydrogen, helium, and ammonia

Sulfur and oxygen form both sulfur dioxide and sulfur trioxide. When samples of these are decomposed, the sulfur dioxide produces 3.49 g oxygen and 3.50 g sulfur, while the sulfur trioxide produces 6.75 g oxygen and 4.50 g sulfur.

How do you calculate the number of atoms of hydrogen present in the sample of methane 8.71x10^23 mc

Consider two solutions, solution a and solution b. [h+] in solution a is 370 times greater than that in solution b. part a what is the difference in the ph values of the two solutions?

All of the following are possible sources of error in a scientific investigation except for O measuring materials such as mass and volume incorrectly. o recording experimental data incorrectly. o having a constant in your experiment.

Do polyatomic ions have fixed charges?

Which type of organism is used to make bread rise when baking? A. plants B. protists C. yeast D. bacteria

How many particles are in 3.55 moles of Aluminum Sulfate