Answer:
hydrogen and oxygen form water.from co2
Explanation:
8.7M Is the solubility of Ca(oh)2 in water at a given Ksp of 6.5 .10-6 and molar mass of 74.09g/mol.
Solubility is defined as the amount of the substance dissolved in a given amount of solvent at a certain temperature.
Ca(OH)2 à Ca2+ + 2OH-
Ksp = 6.5 .10-6
Molar mass= 74.09 g/mol
Ksp is solubility product constant which describes the equilibrium between a solid and its ion in solution.
Ksp=[Ca2+] [OH2-]
6.5 .10-6 = S. (74.09g/mol +S)
6.5 .10-6 = S .( 74.09M)
S = 6.5 .10-6 /74.09 M
= 8.7 M
So, the solubility of Ca(OH)2 is 8.7M.
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The density of this gas is 0.20 g/L.
<h3>What is density?</h3>
The density of a substance is the measure of how densely it is packed together. The mass per unit volume is how it is formally defined. The symbol for density: d
The density formula is given by d = m/v, where m is the object's mass and v is its volume.
Given that,
Molar volume of non ideal He gas (v) = 20 L/mol
Molar mass of He gas (m) = 4.0 g/mol
As we know, density of this gas (d) = mass (m) / volume (v)
= 4.0g /20L
= 0.20 g/L
Thus, density of this gas is 0.20 g/L
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Answer:
pH = 11.3
Explanation:
From the question given above, the following data were obtained:
Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M
pH =.?
The pH of a solution is defined by the following equation:
pH = –Log [H₃O⁺]
Thus, with the above formula, we can obtain the pH of the solution as follow:
Concentration of hydronium ion [H₃O⁺] = 4.950×10¯¹² M
pH =.?
pH = –Log [H₃O⁺]
pH = –Log 4.950×10¯¹²
pH = 11.3
Answer:
id say C
Explanation:
process of elimination
you are supposed to avoid trees, water, and poles