Tentacles with stinging cells, 2 body layers (ectoderm & endoderm), radially symmetric
Answer is: mass of barium sulfate is 0.668 grams.
Chemical reaction: BaCl₂ + Na₂SO₄ → BaSO₄<span> + 2NaCl.
V(</span>BaCl₂) = 25.34 mL ÷ 1000 mL/L = 0.02534 L.
c(BaCl₂) = 0.113 mol/L.
n(BaCl₂) = V(BaCl₂) · c(BaCl₂).
n(BaCl₂) = 0.02534 L · 0.113 mol/L.
n(BaCl₂) = 0.00286 mol.
From chemical reaction: n(BaCl₂) : n(BaSO₄) = 1 : 1.
n(BaSO₄) = 0.00286 mol.
m(BaSO₄) = n(BaSO₄) · M(BaSO₄).
m(BaSO₄) = 0.00286 mol · 233.4 g/mol.
m(BaSO₄) = 0.668 g.
Using these Elements. Here would be the 4 ionic compounds.
CaF2
VF5
CaS
V2S5
The
magnesium metal is highly reactive and can ignite in contact with moisture or
even air. The skin is usually covering in moisture, so the contact with it may cause
a reaction that can produce irritation, lesions and even burns.
Crucible
tongs are mandatory to handle hot crucibles to avoid skin burns and accidents
during experimental procedures. Crucible tongs work with the crucible; their shape
was designed to firmly hold it to avoid spills.
