Answer:
Helium, Neon, Radon and Argon have zero valency because they have their outer shell completely filled and are chemically inert gas. Was this answer helpful
Explanation:
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<span>The answer is industrialists. Together with entrepreneurs preferred a comparatively open and flexible immigration policy – one which would safeguard a stable source of workers. Encompassed within this group were the chief steamship and railway businesses which seen immigrants as possible laborers and also vital passengers on their appearances and the basis of future traffic in terms of things and materials.</span>
HCl is <span>limiting reactant, Mg in excess therefore:
</span><span>number of moles HCl:
75.0 mL in liters: 75.0 / 1000 => 0.075 L
Molarity HCl = 1.0 M
n = M x V
n = 1.0 x 0.075
n = 0.075 moles of HCl
</span>Mg(s) + 2 HCl (aq) = H2 (g) + MgCl2 (aq)
<span>2 moles HCl -------------------- 1 mole H2
</span><span>0.075 moles of HCl ------------ ( moles H2)
</span>
moles H2 = 0.075 x 1 / 2
moles H2 = 0.075 / 2
= 0.0375 moles of H2
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The answer is the el second one since it is a physical change
