3 years ago

What form of matter is made of only one type of atom

1 answer:

6 0

An element is a form of matter that is made of only one type of atom

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stepan [7]

H2-element
HCl-compound
Na-element
Al2O3-compound
H2O-compound

6 0

3 years ago

givi [52]

Answer: The enthalpy of formation of $SO_3$ is -396 kJ/mol

Explanation:

Calculating the enthalpy of formation of $SO_3$

The chemical equation for the combustion of propane follows:

$2SO_2(g)+O_2(g)\rightarrow 2SO_3(g)$

The equation for the enthalpy change of the above reaction is:

$\Delta H^o_{rxn}=[(2\times \Delta H^o_f_{(SO_3(g))})]-[(2\times \Delta H^o_f_{(SO_2(g))})+(1\times \Delta H^o_f_{(O_2(g))})]$

We are given:

$\Delta H^o_f_{(O_2(g))}=0kJ/mol\\\Delta H^o_f_{(SO_2(g))}=-297kJ/mol\\\Delta H^o_{rxn}=-198kJ$

Putting values in above equation, we get:

$-198=[(2\times \Delta H^o_f_{(SO_3(g))})]-[(2\times \Delta -297)+(1\times (0))]\\\\\Delta H^o_f_{(SO_3(g))}=-396kJ/mol$

The enthalpy of formation of $SO_3$ is -396 kJ/mol

4 0

3 years ago

emmasim [6.3K]

Dozen = 12,

ii. 1 score = 20

iii. 1 ream = 500

iv. 1 gross = 1.44

6 0

3 years ago

dmitriy555 [2]

Answer:

553.5 cm3

Reason:

1 mL = 1 cm3

6 0

3 years ago

Studentka2010 [4]

The answer is, All of the above

4 0

3 years ago