What is possible reason for trial b not obeying the law of conservation of mass

1.09 L of a gas at standard temperature and pressure is compressed to 374 ml. what is the new pressure of the gas?

If the Large Hadron Collider is 27 km long, and visible light travels 3.0 * 108 m/s, how long does it take a ray of visible light to travel from one end of the collider to the other?

Cindy predicts that plastic foam insulates cold drinks better than metal or ceramic materials do. To test the hypothesis, she fills cups made from these materials with equal amounts of cold water.

How can I calculate the valence electrons of ions?

Adding a chemical that reduces Na + transport near the sinoatrial (SA) node would have what effect on the heart's intrinsic conducting system?

What are some differences between insect larvae and worms?

Suppose that 100 grams of water at 50.0°C is placed in contact with 200 grams of iron at 30.0°C. The final temperature is 46.5°C. The specific heats of water and iron respectively, are 4.18 and 0.45 joules per gram times Celsius.

What type of overall charge, if any, does the balloon in Diagram B have? Explain how you determined your answer.

Move deep below the ocean's surface

The Ka of an acid is 1.3 x 10^-7. Based on the Ka and its relationship with Kw, what is the value of Kb? Use KaKb=Kw 1.3 x 10^-21 7.7 x 10^-15 1.3 x 10^-14 7.7 x 10^-8