Living things transform kinetic energy into potential chemical energy in the
1 answer:
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Answer:
<em><u>≅ 50, 909 nm</u></em>
Explanation:
Wavelength, λ =
Given:
speed of light =
f = 5.89 ×
∴ λ = 3× / 5.89 ×
= 0.0000509 m <em><u>≅ 50, 909 nm</u></em>
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Answer:
71g (assuming experimental data)
Explanation:
The balanced equation for this reaction:
+
→
+
Molar mass of H2SO4 = 98.1 g/mol
molar mass of NaOH = 40g/mol
Molar mass of Na2SO4 = 142.04g/mol
⇒ 1 mole or 98.1g of H2SO4 will yield 1 ole of NaSO4; alternately, 2 moles or 49 ×2 = 80g of NaOH produces 1 mole of NaSO4.
<em>Therefore, limiting reactant is NaOH.</em>
Assuming actual experiment is 20g of NaOH,
1 mole - 40g
x moles - 20g = = 0.5 moles
⇒1 mole of Na2SO4 - 142.04g
∴ 0.5 moles = 142.04 × 0.5
<u>= 71.02g</u>