<u>Answer:</u>
<em>B. A and B</em>
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<u>Explanation:</u>
1. Solids have a definite volume, definite size and definite shape
2. The particles present in a solid are very closely packed since the intermolecular forces between them are very strong. The molecules do not move apart.
3. Melting point is the temperature at which solid changes into a liquid.
4. When a solid is heated to the melting point the intermolecular forces are overcome by the energy and the molecules present in it moves from its fixed position to take its liquid state which is called as melting.
D. Chemical weathering
*i think .
Increase. The particles of the solute are more evenly distributed between the solvent, thus speeding up the process of dissolution.
Answer:
(2)×(9.8)×(0.76)
Explanation:
Given data:
Mass of bottle = 2 kg
Given height = 0.76 m
Gravitational potential energy of bottle = ?
Solution:
Formula:
Gravitational potential energy = mgh
g = 9.8 m/s²
Now we will put the values in formula.
Gravitational potential energy = 2kg×9.8 m/s²×0.76 m
Gravitational potential energy = 14.896 kg.m².s⁻²
j = kg.m².s⁻²
Gravitational potential energy = 14.896 j
For every, 3 Br- ions, 1 Al3+ ion reacts to form AlBr3.
Convert 16.2g of aluminum to moles:
16.2g Al / 27.0g per mol = 0.60 mols.
Based on the above ratio, 0.60 mols of Al will react with 1.8 mols of Br.
Convert 1.8 mols of Br to its mass:
1.8 mols Br × 79.9g per mol = 143.82g of Br.
