Answer:
I think number4.Nuclear fusion reaction is not possible in earth
<h2>
Answer:It always contains certain elements,It always contains elements in definite proportions.,It cannot contain atoms from more than one element.</h2>
Explanation:
The mineral need not occur always in a pure form.On purification we get the exact chemical composition.
The mineral always has a definite chemical composition which means the number of elements and types of elements in the mineral does not change.
Since the mineral has definite composition,the elements in the mineral has definite proportions.
The mineral can be a compound.So,there can be atoms from more than one element.
They are called inert gases, Nobel gases.
The common character in them all that they have a complete last electron shell. That they rarely tend to form any further chemical compounds.
Answer:
The best place to install a heating vent is on the floor or low on the wall.
Explanation:
This is due to the fact that heat rises so if you were going to put it on the room then the hot air is going to just push the cooler air down.
Molar mass sucrose :
C12H22O11 = 342.29 g/mol
number of moles <span>of the solute :
</span>
n = mass solute / molar mass
n = 17.1 / 342.29
n = 0.05 moles
Volume in liters :
250 mL / 1000 = 0.25 L
therefore :
Molarity = moles of solute / volume
Molarity = 0.05 / 0.25 => 0.2 mol/L