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2 years ago

Explain the following terms Sublimation

Chemistry

1 answer:

weqwewe [10]2 years ago

8 0

Answer:

Sublimation is the transition of a substance directly from the solid to the gas state, without passing through the liquid state. ... The reverse process of sublimation is deposition or desublimation, in which a substance passes directly from a gas to a solid phase.

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Mg + 2H20 + Mg(OH)2 + H2 + 353kJ

mixer [17]

Answer:

$m_{H_2O}=8.9g$

Explanation:

Hello,

Based on the given reaction, since magnesium and water are in a 1:2 molar ratio at the reactants, we must apply the following stoichiometric factors to compute the complete reaction of the 6.0 g of magnesium:

$m_{H_2O}=6.0gMg*\frac{1molMg}{24.305 gMg}*\frac{2molH_2O}{1molMg} *\frac{18gH_2O}{1molH_2O} \\\\m_{H_2O}=8.9g$

Best regards.

7 0

3 years ago

Please help me I’m not sure with that

Alex73 [517]

What I can’t see the pic ?hhbc639l73773 ghcbhjbch

5 0

2 years ago

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Use for questions 1-4

Y_Kistochka [10]

Answer: 1) 1.6 moles of HCl

2) 7.0 moles of HCl

3) 2.4 moles of hydrogen

4) 0.96 moles of HCl

Explanation:

The balanced chemical equation is:

$Zn+2HCl\rightarrow ZnCl_2+H_2$

According to stoichiometry :

1 mole of $Zn$ require = 2 moles of $HCl$

0.8 moles of $Zn$ will require= $\frac{2}{1}\times 0.8=1.6moles$ of $HCl$

3.5 moles of $Zn$ will require= $\frac{2}{1}\times 3.5=7.0moles$ of $HCl$

According to stoichiometry :

2 moles of $HCl$ produce = 1 mole of $H_2$

4.8 moles of $HCl$ will require= $\frac{1}{2}\times 4.8=2.4moles$ of $H_2$

According to stoichiometry :

1 mole of $ZnCl_2$ are produced by = 2 moles of $HCl$

0.48 moles of $ZnCl_2$ are produced by = $\frac{2}{1}\times 0.48=0.96moles$ of $HCl$

6 0

2 years ago

List the symbols for all the elements with electron configurations that end as follows. Each n represents an energy level.

Gwar [14]

List the symbols for all the elements with electron configurations that end as follows. Each n represents an energy level.

a. ns1

b. ns2np4

Answer: a) H, Li, Na, K, Rb, Cs, and Fr

b) O, S, Se, Te, Po

Explanation:

a. Determining the elements correlating to the electron configuration of "ns1" , you should understand that this suggests that the elements are in Group 1A.

This is because that there is one electron in an s-orbital. The orbital is located in the first column of the periodic table.

Thus, the elements that have this electron configuration are H, Li, Na, K, Rb, Cs, and Fr.

b. Determining the elements correlating to the electron configuration of ns^2np^4 characterizes group 6A of the periodic table.

This is because that there is have six valence electrons in their highest-energy orbitals (ns2np4). The orbital is located in the first column of the periodic table.

Thus, the elements that have this electron configuration are the nonmetals oxygen (O), sulfur (S), and selenium (Se), the metalloid tellurium (Te), and the metal polonium (Po).

6 0

2 years ago

Which statement provides background knowledge that helps a reader understand the theme of valuing all life found in"Birdfoot's G

alekssr [168]

Answer:

i think its A

Explanation:

7 0

3 years ago

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