It is called convection. When warm air, or current, moves up and disperse outwards as cold air, or current, moves into the warmer region.
Answer:
53% aluminium is present.
Explanation:
Given data:
Mass of aluminium in bauxite = 108 g
Total mass of sample = 204 g
Percentage of aluminium = ?
Solution:
Formula:
Percentage = Mass of aluminium / total mass of sample× 100
Now we will put the values in formula:
Percentage = 108 g/204 × 100
Percentage = 0.53 × 100
Percentage = 53%
So in given 204 g of bauxite there is 53% aluminium is present.
Answer;
D. Formation of NADPH
Explanation;
During the process of photosynthesis light is converted to chemical energy.
During stage 1, Excited electrons that leave the chlorophyll pigments in stage 1 are used. Excited electrons are passed through proteins in the thylakoid membrane like a ball being passed from person to person. H2o molecules split and turn into H+ molecules and O2 gas, then pigments take the electrons from the split water molecules and release O2 into the atmosphere.
During stage 2; electrons from 1st cluster pump H+ ions into the thylakoid membrane through the hydrogen ion pump (protein membrane. Higher concentration of H+ ions inside the thylakoid membrane compared to outside. H+ ions diffuse out of the thylakoid throught the ATP synthase (enzyme in membrane). ATP synthase catalyzes the reaction ADP + P ---->ATP.
Stage 2; Excited electrons + H+ ions + NADP+= NADPH
Answer:
the chemical change occur in burning paper.
boiling water does not make any chemical change
melting gold "
dissolving sugar in water "
in these examples the reactant remains as the same , even if you melt gold it is gold itself, it only change its state.
The solubility product expressions for the CuBr, ZnC₂O₄ and Ag₂CrO₄ will be represented as [Cu⁺][Br⁻], [Zn²⁺][C₂O₄²⁻] and [Ag⁺]²[CrO₄²⁻] respectively.
<h3>What is solubility product expressions?</h3>
The solubility product expression or constant is denoted by Ksp, and it is the equilibrium constant for a solid substance dissolving in an aqueous solution.
- Balanced chemical reaction of CuBr is CuBr → Cu⁺ + Br⁻ and value of Ksp will be written as Ksp = [Cu⁺][Br⁻].
- Balanced chemical reaction of ZnC₂O₄ is ZnC₂O₄ → Zn²⁺ + C₂O₄²⁻ and value of Ksp will be written as Ksp = [Zn²⁺][C₂O₄²⁻].
- Balanced chemical reaction of Ag₂CrO₄ is AgCrO₄ → 2Ag⁺ + CrO₄²⁻ and value of Ksp will be written as Ksp = [Ag⁺]²[CrO₄²⁻].
Hence balanced equations with solubility product expressions will be shown above.
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