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d1i1m1o1n [39]
3 years ago
14

What are three methods of measuring the volume of an object?

Chemistry
1 answer:
Anarel [89]3 years ago
5 0
L×w×h=v
length times width times height equals volume
the order in which you multiply does not matter
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Calculate the concentration of the following solution in mol/dm3 0.1 moles of NaCl in 200 cm3
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1 cm ^{3} = 0.001 dm ^{3}. Therefore 200 cm ^{3} = 0.2 dm ^{3}. Molarity = \frac{number of moles of NaCl}{volume of the solution} =  \frac{0.1}{0.2} = 0.5 mol/dm^{3}. Hope this helps.
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Select the properly written and balanced equation for the following chemical reaction: Sodium metal and an aqueous solution of m
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Answer:2Na(s)+MgI_2 (aq)\rightarrow 2NaI(aq)+Mg(s)

Explanation: The chemical reaction is written by writing down the chemical formulas of the reactants on the left hand side and the chemical formulas of products on the right hand side separated by a right arrow.

This is a single displacement reaction in which a more reactive element displaces the less reactive element from its salt solution. Thus sodium is more reactive than Mg and thus displaces it from MgI_2.

2Na(s)+MgI_2 (aq)\rightarrow 2NaI(aq)+Mg(s)

The number of atoms of each element must be same on both sides of the reaction so as to follow the law of conservation of mass. Thus the equation is balanced.

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What did organizing information on the periodic table reveal?
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Answer:

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From this list, select the element that forms π bonds most readily. from this list, select the element that forms bonds most rea
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Nonmetals which are located in the second row form pi bonds more easily than the elements situated in the third row and below. Actually there are no compounds or molecules known that forms covalent bonds to the noble gas Ne and Ar. Hence the other second row element which is Carbon, is the element that forms pi bonds most readily.

 

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<span>C</span>

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