Answer:
a.
can be made up of a combination of different elements.
Answer:
The volume is the same for any gas.
Explanation:
<em>Which describes the volume of 1 mol of gas at standard temperature and pressure?
</em>
- <em>The volume is greater for a larger mass of gas.</em> FALSE. The volume depends on the amount of matter (moles) and not on the mass.
- <em>The volume is the same for any gas.
</em> TRUE. The volume of any gas at standard temperature and pressure is 22.4 L.
- <em>The volume depends on the size of the container.</em> FALSE. The volume is constant at fixed moles, pressure and temperature.
- <em>The volume varies with the pressure.</em> FALSE. The standard pressure is 1 atm and it is constant.
The noble gases are helium, neon, argon, krypton, xenon, radon, and ununoctium. The noble gases are relatively nonreactive. This is because they have a completevalence shell<span>. They have little tendency to </span>gain<span> or lose </span>electrons. <span>These gases all have similar properties under standard conditions: they are all odorless, colorless, monatomic gases with very low chemical </span>reactivity<span>. The six noble gases that occur naturally are helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn).</span>
Answer:
Carbon : chemical symbol is "C"
Chlorine: chemical symbol is"Cl"
Answer:
4.97 moles
Explanation:
There are 6.022*10^23 calcium atoms in 1 mole of Ca
2.99*10^24/6.022*10^23
=4.97 moles