Answer:
Oobleck is a mixture of cornstarch & water, a substance that behaves like the Mantle.
Explanation:
Answer:
Density =1.27g/cm
Explanation:
Density is the mass per volume of a substance.
That is
Density = mass/volume
Given that mass = 14g
Volume = 11cm³
Therefore
Density = 14/11 g/cm³
Density =1.27g/cm³
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A mineral always contain certain elements in definite proportions
The balanced chemical equation for the reaction is as follows:
From the molarity and volume of 
and KI, number of moles can be calculated as follows:
For :
Similarly, for KI:
From the balanced chemical reaction, 1 mol of gives 1 mole of 
thus, 0.01417 mol will give 0.01417 mol.
Molar mass of is 461.01 g/mol, mass can be calculated as:
Similarly, 2 mol of KI gives 1 mole of thus, 0.0212 mol will give 
of .
Mass can be calculated as:
The amount of obtained from KI is less than that from thus, KI is limiting reactant and amount of obtained from KI will be theoretical yield.
Actual yield is 3.26 g, % yield can be calculated as follows:
Putting the values,
=66.80%
Therefore, % yield will be 66.80%.
Explanation:
One mole of NaOH weighs 40gm.
Now 2M solution of NaOH indicates 2 moles of NaOH in 1 litre of water.
So the above question can now be simplified as …if one litre of water contains 80gm(2 moles) of NaOH, then how many grams of NaOH would 250ml solution of the same contain?
Using unitary method,
1000ml corresponds to 80gm NaOH…
1000/4 ml(250ml) corresponds to 80/4 gm NaOH…
Therefore, for 250ml of 2M NaOH, 20 gm of NaOH needs to be added to water.
