Question 1 of 10
2 Points
Why do metals tend to lose electrons to form positive ions?
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A. They conduct electricity, which makes them lose their electrons.
B. A metal atom loses its few valence electrons to form a full octet.
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C. They hold on tightly to electrons.
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D. The positive ions that are formed when metals lose electrons are
more reactive than the neutral metals.

i believe the answer is true.

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

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