Data Analysis Elements Density
Aluminum 2.698 g/mL
Calcium 1.54 g/mL
Iron
7.8738 g/mL
Silicon 2.3296 g/mL
Question:
Your teacher hands you a small sample of a mystery metal and the chart seen here. Available to you for lab use are: ruler, 100mL
graduated cylinder, 100 ml beaker, bunsen burner, analytical balance, and a crucible. Using only the materials provided:
explain how you would measure the properties needed for determining density:
using your own hypothetical data from the above procedure, calculate the density of a sample; and
use your calculations to show how you would determine the identity of the sample.
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12 is it do you think so

answer : third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

explanation :

let us write down the given equations

equation 1 :

equation 2 :

equation 3 :

let us use hess's law to find out which 2 equations can be added to get the third equation.

let us reverse equation 2 and multiply it by 2. the new equation that we get is,

equation 4 :

let us add equation 1 & 4

the above equation is similar to equation 3 but has different value for dhrxn.

therefore third trial had the contaminated sample and the correct value for dhrxn should be 1000 kj/mol

diaria maybe go see a doctor about that

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.