Answer:
293 grams Fe₂S₃(s)
Explanation:
16Fe(s) + 3S₈(s) => 8Fe₂S₃(s)
Excess | 1.25 mole | ? grams
moles Fe₂S₈ produced = 8/3(1.25) mole Fe₂S₃(s) Yield = 3.33 mole Fe₂S₃(s)
∴ grams of Fe₂S₈ = 3.33 mole x 88 g/mole = 293 grams Fe₂S₃(s)
Acidity of lactic acid = pKa = 3.85
Ca = 0.13M
Cs = 0.11M
<span>Henderson-Hasselbalch equation:</span>
pH = pKa + log(Cs/Ca)
pH = 3.85 + log(0.11M/0.13M) = 3.85 + log0,846 = 3.85 - 0.073 = <u>3.777</u>
Answer:
True.
Explanation:
Dissolution changes the properties of molecules or atom.
Explanation:
<u>Physical properties of ZBr₂</u>
The compound is an ionic substance. Therefore it will have properties of ionic compounds. Some of these properties are:
- it is a hard solid usually with high melting points or a liquid with high boiling points.
- Soluble in water and insoluble in non-polar solvents.
- It can conduct electricity in aqueous solutions or in molten form.
- it will undergo a fast reaction.
<u>Z is a metal</u>
To form ionic compound, a metal will combine with a non-metal. Bromine is a non-metal and it is expected that Z will be a metal. This is because ionic bonds involves transfer of electron from one specie to the other. Metals are usually the donor and non-metals are the receptor. This is how ionic bond forms. The electrostatic attraction resulting from the ions produced the ionic bond.
<u>Formula of the oxide</u>
ZO
Z 0
+2 -2
It is obvious that Z has 2 valence electrons. It will lose the two valence electrons to attain stability.
Oxygen requires 2 electrons to resemble Neon. This combination will give a compound ZO.
Learn more:
ionic compounds brainly.com/question/6071838
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80 / 40 = 2 Therefore the density is 2g/mL