By what two characteristics are all the elements of the periodic table placed in a particular row and column

1 answer:

7 0

Rows are defined as which shell of the element contains the outermost electrons. As the rows increase, the outermost shell value increases, as well. The columns are defined as which block contains those outermost electrons, and the shape at which that orbital takes.

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0.444 mol C2H5OH= how many molecules

brilliants [131]

Explanation:

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2 years ago

Given the reaction: cu(s) + 4hno3(aq) → cu(no3)2(aq) + 2no3(g) + 2h2o(l )as the reaction occurs, what happens to copper?

katrin [286]

From the reaction between Cu and HNO₃, the formed gas is NO₂ instead of NO₃. Hence the correct balanced equation would be,
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Here, Cu goes to Cu(NO₃)₂ by changing its oxidation number from 0 to +2 while NO₃⁻ goes to NO₂ by reducing its oxidation state from +5 to +4 . Hence Cu is oxidized by HNO₃ in the reaction.

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2 years ago

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2 years ago

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In the reaction represented by the equation 2al2o3 ® 4al + 3o2, what is the mole ratio of the products aluminum and oxygen?

DerKrebs [107]

Answer:
4 : 3

Explanation:
The balanced chemical equation is given as follows:
2Al₂O₃ ..............> 4Al + 3O₂
Now, from this equation we can note that:
For every 4 moles of aluminum moles produced, corresponding 3 oxygen moles are produced.
This means that the ratio between the formation of aluminum to the formation of oxygen moles is 4:3

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3 years ago

A sheet of polyethylene 1.5-mm thick is being used as an oxygen barrier at a temperature of 600K. If the flux is 2.48 x 10-5 kg/

Eddi Din [679]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The concentration of high-pressure side is $C_1 = 0.722 \ kg/m^3$