Answer:
- <em>The kinetic energy in J of an electron moving at 6.00 × 10⁻⁶ m/s is:</em>
<em> </em><u>1.64 × 10 ⁻³⁸ J</u>
<em />
Explanation:
<u>1) Data:</u>
a) KE =?
b) v = 6.00 × 10⁻⁶ m/s.
c) m = 9.11 × 10⁻²⁸ g.
<u>2) Formula:</u>
<u>3) Solution:</u>
- KE = (1/2) = (1/2) × 9.11 × 10⁻²⁸ g × ( 6.00 × 10⁻⁶ m/s)² = 163.98 × 10 ⁻⁴⁰ J
Answer:
Mass of reactant and mass of product must be equal.
Explanation:
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by French chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
Electrolyte is any species which when dissolved in solvent particularly water dissociates into cations and anions. Electrolytes are conductors of electricity. In given options;
CCl₄ (Tetrachloromethane) is a covalent compound. And it doesn't dissociate to any cation or anion. So it is not electrolyte.
SiO₂ (Silicon Dioxide) is also covalent in nature and exist in giant framework. It is not electrolyte.
Glucose (C₆H₁₂O₆) is also covalent compound. And doesn't produced any ion in water, hence it is not electrolyte.
H₂SO₄ (Sulfuric acid) is Electrolyte. When it is dissolved in water it produces H⁺ and SO₄²⁻ ions as follow,
H₂SO₄ → 2 H⁺ ₍aq₎ + SO₄²⁻ ₍aq₎
Result:
H₂SO₄ is electrolyte.
The molar absorptivity () of benzoic acid at 228 nm? assume that the path length is 1. 00 cm is = 11178 M-1. cm-1
We are given, absorbance spectrum and from that the absorbance of benzoic acid at 228 nm
Absorbance = 0.8
Now we need to calculate the molar absorptivity of benzoic acid at 228 nm
We know at the 228 nm the A = 0.8 and C = 8.74 mg/L.
We also given the l = 1 cm
Moles of benzoic acid = 0.00874 g / 122.12 g.mol-1
= 7.16*10-5 moles
So, C of benzoic acid = 7.16*10-5 moles / L
We know the
ε = A/C*l
= 0.80 / 7.16*10-5 M. 1 cm
= 11178 M-1. cm-1
Learn more about molar absorptivity here:-brainly.com/question/13350541
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