Question
what is a molecular Solid
Answer:
A molecular solid is a type of solid in which molecules are held together by van der Waals forces rather than by ionic or covalent bonds.
Explanation:
A molecular solid is a solid consisting of discrete molecules. The cohesive forces that bind the molecules together are van der Waals forces, dipole-dipole interactions.
For question 1:
<span>25°C = 298 K
</span><span>ΔG = ΔH - T ΔS
</span>ΔH= ΔG + TΔS = −91368 + (298)(−284)=−91368-84632=-175730
<span>Therefore ΔH is approx - 176,000 J
</span>
For question 2:
The statement "A negative change in free energy, or −ΔG, represents a spontaneous reaction." is false
To determine the amount of heat the block has absorbed, we simply multiply the mass of the block of ice to the heat of fusion of water which is given above. We calculate as follows:
Heat = 20.0 kg (3.34 x 10^5 J/kg)
Heat = 6680000 J
Hope this helped.
Round off .00042557 to three significant digits is = 0.000426
<h3>What is round of value ?</h3>
- If 5, 6, 7, 8, or 9 come after the number you are rounding, round it up. For instance, 40 is the result of rounding 38 to the nearest ten.
- If the numbers 0, 1, 2, 3, or 4 come after the number, round it down. If 33 is rounded to the nearest ten, it becomes 30.
- To estimate a certain number in a context, rounding is a process. Look at the next digit in the correct position to determine how to round a number; if it is less than 5, round down, and if it is 5 or more, round up.
Given
The digit of 00042557
Three significant digits is 0.000426
To learn more about round of value refer to :
brainly.com/question/25297296
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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.