A nebula. A nebula is an interstellar cloud of dust, hydrogen gas, helium gas and other ionized gases where stars are created.

A helium balloon with an internal pressure of 1.00 atm and a volume of 4.50 L at 20.0°C is released. What volume will the balloon occupy at an altitude where the pressure is 0.600 atm …

Feb 18, 2017 · Possibly the best metric with which to compare this is the boiling point of the gases: helium has a normal boiling point of 4*K; hydrogen chloride boils at 188*K - how is this …

The "Noble Gases" are Group VIII (or 18) of the Periodic Table: helium; neon; argon; krypton; xenon. Another name for this Group are the "Inert Gases". Given the full valence shell of this …

Explanation: When you use a helium balloon, why don't you have to heat the gas in the canopy? Dihydrogen is even lighter than helium (it's certainly cheaper); why don't we use dihydrogen …

Then, you have an emission rate of #8.4 × 10^10# α particles per second per day and helium formation at a rate of #1.69 × 10^"-4"# mL/day.

What would be the volume of 6.00 g of helium gas at STP? Rank each of the elements in order of decreasing ionization energy: S, Cl, Br? (Justify) Write the equilibrium-constant expression for …

A tank contains helium gas at 490 mmHg, nitrogen 0.75 atm, and neon at 520 torr. What is the total pressure in atm? At -2000 meter below sea level, what is the atmospheric pressure? At …

May 31, 2017 · The eighth planet is Neptune. Neptune is the eighth and currently the furthest planet from the Sun. Even though Neptune is called an ice giant it isn't made of ice. In fact it is …

How does temperature affect the movement of atoms and molecules? How are real gases different from ideal gases? Why do helium filled balloons deflate over time faster than air-filled …