Hey There!
At neutralisation moles of H⁺ from HCl = moles of OH⁻ from Ca(OH)2 so :
0.204 * 42.8 / 1000 => 0.0087312 moles
Moles of Ca(OH)2 :
2 HCl + Ca(OH)2 = CaCl2 + 2 H2O
0.0087312 / 2 => 0.0043656 moles ( since each Ca(OH)2 ives 2 OH⁻ ions )
Therefore:
Molar mass Ca(OH)2 = 74.1 g/mol
mass = moles of Ca(OH)2 * molar mass
mass = 0.0043656 * 74.1
mass = 0.32 g of Ca(OH)2
Hope that helps!
It has a definite volume but not a definite shape
<em>Hydrogen bromide</em>
<em>Basicity (pKb) ~23</em>
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2nd group of the periodic table
B) The carbon atoms in graphite are arranged in widely spaced layers
Explanation:
Graphite is different from other allotropes of carbon because the carbon atoms in graphite are arranged in widely spaced layers. Graphite and diamond are the two main allotropes of carbon that are closely related.
- Both allotropes forms under extreme temperature and pressure. In geology, they are categorized as derivatives of changed rocks.
- Graphite is different from carbon because its atoms are arranged in widely spaced layers.
- Diamond has a packed and cross-linked structure that makes it rigid and very hard.
Learn more:
diamond brainly.com/question/10515084
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