Top to bottom:
osmosis
high
low
into
out of
sodium
Answer: 0.11 g H2
Explanation: just took test and got it right
1) Answer is: WO3 + 3H2 → W + 3H2O.
Reduction reaction: W⁺⁶ + 6e⁻ → W⁰.
Oxidation reaction: H₂ → 2H⁺¹ + 2e⁻ / ×3; 3H₂ → 6H⁺¹ + 6e⁻.
Wolfram change oxidation number from +6 to 0 (reduction) and hydrogen change oxidation number from 0 to 01 (oxidation).
In other examples, elements do not change their oxidation numbers.
2) Answer is: It increases the average kinetic energy and there are more collision per minute.
The collision theory states that a certain fraction of the collisions (successful collisions) cause significant chemical change.
The successful collisions must have enough energy (activation energy).
Chemical bonds are broken and new bonds are formed.
Particles are in constant, random motion and possess kinetic energy, molecules faster and have more collisions.
We use the term formula unit for ionic compounds because ;
- Ionic compounds consist of cations and anions present in constant ratio ( C )
- Ionic compounds consist of continuous arrays of cations and anions ( D )
The molecule of an ionic compound gets attached to another molecule of an ionic compound via electrostatic force of attraction. this form of attraction between the molecules forms an arranged lattice structure. and due to this well arranged lattice structure an ionic compound can be termed as a Formula unit and not molecule.
Hence the correct options are as listed above
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