1) Chemical reaction: HI(aq) → H⁺(aq) + I⁻(aq).
It gives an iodide anion.
2) Chemical reaction: H₂O → H⁺(aq) + OH⁻(aq).
It gives a hydroxide anion.
3) Chemical reaction: NH₄⁺(aq) → H⁺(aq) + NH₃(aq).
It gives ammonia.
4) Chemical reaction: HNO₃(aq) → H⁺(aq) + NO₃⁻(aq).
It gives nitrate anion.
Answer:
The percent error of student is -5 %.
Explanation:
Given data:
measured value = 9.31 m/s²
actual value = 9.8 m/s²
percent error = ?
Formula:
% error = (measured value - actual value / actual value ) × 100
% error = (9.31 m/s² - 9.8 m/s² / 9.8 m/s²) × 100
% error = (-0.49 m/s² / 9.8 m/s²) × 100
% error = -0.05 × 100
% error = -5
The organism would no longer grow.
Fe + 2 HCl --> FeCl2 + H2 <span>
2 Al + 6 HCl --> 2 AlCl3 + 3 H2
<span>total moles H2 = 0.100 g / (2.016 g/mol) =0.0496 mol
let x = mass Fe
let y = mass Al
</span></span>
<span>Total mass of alloy is:
<span>x + y = 2.07
</span></span>
<span>Performing H2 balance based on stoichiometry:
<span>x / 55.847 + 3 y/2 / 26.9815 = 0.0496
x / 55.847 + 3y/53.963 = 0.0496
<span>53.963 x + 167.541 y = 149.48
<span>53.967 ( 2.07 - y) + 167.541 y = 149.48
<span>111.71 - 53.967 y + 167.541 y = 149.48
<span>113.6 y = 37.77
y = 0.332 g = mass Al
% Al = 0.332 x 100/ 2.07 = 16.06 %
<span>% Fe = 83.94%</span></span></span></span></span></span></span>