2 years ago

How do you determine how much alum can be dissolved in 10 ml of hot deionized water to make a saturated solution??

1 answer:

3 0

You need to monitor the solution to see when the crystals start gathering at the bottom of the solution. You can slowly add alum until it stops dissolving. The point just before it starts its sedimentation at the bottom is the point when the solution is saturated.

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How many unbonded pairs of electrons are found on the alanine molecule

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Answer:

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2 years ago

In a boys hostel, 1206 eggs were bought for breakfast for the students. How many moles of eggs does this represent?

Evgen [1.6K]

Answer:

6.022×1023

Here, it has been asked how many eggs are in one mole of eggs. The eggs represent the unit which can be atom, ion or molecule. So by the definition of mole, 6.022×1023number of eggs are present in one mole of eggs.

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2 years ago

When aqueous solutions of Na2SO4 and Pb(NO3)2 are mixed, PbSO4 precipitates. Calculate the mass of PbSO4 formed when 1.25 L of 0

neonofarm [45]

Answer:

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Explanation:

mole of Pb(NO₃)₂ = 1.25 x 0.05 = 0.0625

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Pb(NO₃)₂ + Na₂SO₄ → PbSO₄ + 2 NaNO₃

( Mole/Stoichiometry ) $\frac{0.0625}{1}$ $\frac{0.05}{1}$

= 0.0625 = 0.05

From (Mole/ Stoichiometry ) we can conclude that Na₂SO₄ is limiting reagent.

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2 years ago

write the equation that matches the description one atom of zinc reacts with one atom of sulfur to yield one molecule of zinc su

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Explanation:

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3 years ago

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Answer:

What is the question? It looks like a fact.

Explanation:

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