3 years ago

Can someone help me pls? Zr + O ⇒ B + O ⇒ Zn + C ⇒ Co + I ⇒ Mg + Br ⇒

Chemistry

1 answer:

Korolek [52]3 years ago

8 0

Explanation:

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Answer number 3 plzz

SCORPION-xisa [38]

Answer:

energy

Explanation:

it is required energy to remove an electron from an atom

7 0

3 years ago

Which of the following would not cause an increase in the pressure of a gaseous system in a container? A The container is made l

ludmilkaskok [199]

Answer:

The container is made larger

Explanation:

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2 years ago

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Transition metals often form ions with a charge of _____-

Bess [88]

+1 for transition metals

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3 years ago

A turtle moves at a speed of 1.0km/h. How fast is the turtle moving in meter per second

e-lub [12.9K]

Answer:

The speed of the turtle is 9.41 centimeters per second.

Explanation:

Speed of small turtle = 566 furlong/fortnight

1 furlong = 20,116.8 cm

1 fortnight = 1,209,600 seconds

Speed of small turtle in centimeter per seconds:

The speed of the turtle is 9.41 centimeters per second.

Explanation:

5 0

3 years ago

A scientist measures the standard enthalpy change for the following reaction to be 67.9 kJ:

bekas [8.4K]

Answer: The standard enthalpy of formation of $H_2O(g)$ is -252.1 kJ/mol.

Explanation:

The balanced chemical reaction is,

$Fe_2O_3(s)+3H_2(g)\rightarrow 2Fe(s)+3H_2O(g)$

The expression for enthalpy change is,

$\Delta H=[n\times H_f_{products}]-[n\times H_f_{reactantss}]$

Putting the values we get :

$\Delta H=[2\times H_f{Fe}+3\times H_f{H_2O}]-[1\times H_f{Fe_2O_3}+3\times H_f{H_2}]$

$67.9kJ=[(2\times 0)+(3\times H_f{H_2O})]-[(1\times -824.2kJ/mol)+3\times 0kJ/mol)]$

$H_f{H_2O}=-252.1kJ/mol$

Thus standard enthalpy of formation of $H_2O(g)$ is -252.1 kJ/mol.

3 0

3 years ago