Answer:
the molar mass is 40 and the metal is Calcium
Explanation:
X + H2SO4=X2SO4 + H2
The mole ratio is 1:1
no of mole of H2SO4= conc(M) × Vol(L)
=0.1×0.5
=0.05 mol
from the balanced chemical equation of the reaction
no of mole of 'X' = no of mole of H2SO4
thus no of mole of X=0.05 mol
Also, no of mole=mass/molar mass
molar mass of 'X'=mol/mass
=2/0.05
=40
I can’t see the question :/
Answer:
B) Reactivity
Explanation:
Density, color, melting point, rigidity, fluidity, shape, size etc are all physical properties of any substance.
so, the answer is option b - reactivity.
Answer is: Ksp for strontium arsenate is 2.69·10⁻¹⁸.
Balanced chemical reaction (dissociation):
Sr₃(AsO₄)₂(s) → 3Sr²⁺(aq) + AsO₄³⁻(aq).
s(Sr₃(AsO₄)₂) = 0.0650 g/L.
s(Sr₃(AsO₄)₂) = 0.0650 g/L ÷ 540.7 g/mol = 1.2·10⁻⁴ mol/L.
s(Sr²⁺) = 3s(Sr₃(AsO₄)₂).
s(AsO₄³⁻) = 2s(Sr₃(AsO₄)₂).
Ksp = s(Sr²⁺)³ · s(AsO₄³⁻)².
Ksp = (3s)³ · (2s)².
Ksp = 108s⁵.
Ksp = 108 · (1.2·10⁻⁴ mol/L)⁵ = 2.69·10⁻¹⁸.