The answer is C <span>The reactants lost internal energy.</span>
Answer:
True
Explanation:
The correct option is - True
Answer:
Pseudoscience
Explanation:
Predicting the future based solely on the position of the planets is an example of <u>pseudoscience</u>.
<em>Pseudoscience is a body of knowledge that is not based on the scientific method but on some unverifiable/unprovable claims.</em>
Predictions about the future can only be valid if it is based on the scientific method, not just about the position of the planet. The scientific method involves observation, hypothesis formulation, testing of the hypothesis through repeatable experiments, and arriving at conclusion.
Any other statement or belief that is not based on these procedures is said to be pseudoscientific.
Answer is: concentration of the sodium hydroxide solution is 2M.
Balanced chemical reaction:
3NaOH(aq) + Cr(NO₃)₃(aq) → Cr(OH)₃(s) + 3NaNO₃(aq).
m(Cr(OH)₃) = 2.06 g.
n(Cr(OH)₃) =2.06 g ÷ 103 g/mol.
n(Cr(OH)₃) = 0.02 mol.
From reaction: n(Cr(OH)₃) : n(NaOH) = 1 : 3.
n(NaOH) = 0.06 mol.
From chemical reaction: NaOH(aq) + HCl(aq) → NaCl(aq) + H₂O(l):
n(HCl) = n(NaOH) = 0.1 L · 0.4 M = 0.04 mol.
n(NaOH) = 0.06 mol + 0.04 mol = 0.1 mol.
c(NaOH) = 0.1 mol ÷ 0.05 L = 2 mol/L.
