Answer is: 0,0095 mol of hydrogen gas will be produced in reaction.
Chemical reaction: Ca + 2HCl → CaCl₂ + H₂.
m(Ca) = 0,38 g.
n(H₂) = ?
n(Ca) = m(Ca) ÷ M(Ca).
n(Ca) = 0,38 g ÷ 40 g/mol
n(Ca) = 0,0095 mol.
from reaction: n(Ca) : n(H₂) = 1 : 1.
n(H₂) = n(Ca) = 0,0095 mol.
n - amount of substance.
Answer:
10
Explanation:
In image
Take atomic mass or molar mass
of Al =27
Answer:
A
Explanation:
1 lb = .453 kg...so...103 x .453 = 46.72 kg
you then multiply that by the force of gravity which is 9.8(m/s2)...so...
46.72 x 9.8 = 458 newtons(kg x m/s^2), which is the force.
pressure (in pascals) = Force(N) / Area (m2)
we need to convert 10cm2 to m2 which = .001m^2
458 / .001 = 458000 = 4.58 x 10^5 Pa
