It means it is an ion. It has lost two protons making it a positive ion.
633.97 L
Explanation:
Well use the combined gas law;
P₁V₁T₁ = P₂V₂T₂
We need to change the temperatures into Kelvin;
18.9°C= 292.05 K
5.9°C = 279.05 K
756 * 512 * 292.05 = 639 * V₂ * 279.05
113,044,377.6 = 178,312.95 V₂
V₂ = 113,044,377.6 / 178,312.95
V₂ = 633.97 L
Statement B is true because atoms are single particles that come together to form compounds and molecules.
A starfish has five equal arms, so a starfish would have 5 lines of symmetry. Hope this helps!
I attached a photo of my work below. Please tell me if I got it wrong; hope you got a good score on your assignment! ^v^
