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2 years ago

Al+S —>___Al S 8 2 3

Chemistry

1 answer:

sergeinik [125]2 years ago

8 0

Answer:

what are we to do there coz I can't figure anything out oo

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Please help me as soon as possible! Please help me as soon as possible!

Nastasia [14]

The Answer is D. Suspending a heavy weight with a strong chain.

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3 years ago

Consider the following intermediate chemical equations.

QveST [7]

Answer: 250 kJ

Explanation: According to Hess’s law of constant heat summation, the heat absorbed or evolved in a given chemical equation is the same whether the process occurs in one step or several steps.

According to Hess’s law, the chemical equation can be treated as algebraic expressions and can be added or subtracted to yield the required equation. That means the enthalpy change of the overall reaction is the sum of the enthalpy changes of the intermediate reactions.

$P_4(s)+6Cl_2\rightarrow 4PCl_3$ $\Delta H_1=-2439kJ$ (1)

$4PCl_5(g)\rightarrow P_4(s)+10Cl_2(g)$ $\Delta H_2=3438kJ$ (2)

Net chemical equation:

$PCl_5(g)\rightarrow PCl_3(g)+Cl_2(g)$ $\Delta H=?$ (3)

Adding 1 and 2 we get,

$4PCl_5(g)\rightarrow 4PCl_3(g)+4Cl_2$ $\Delta H_3=\Delta H_1+\Delta H_2=-2439+3438=1000kJ$ (4)

Now dividing equation (4) by 4, we get

$PCl_5(g)\rightarrow PCl_3(g)+Cl_2$

$\Delta H=\frac{\Delta H_3}{4}=\frac{1000kJ}{4}=250kJ$ (4)

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2 years ago

Suggest one reason why cans are not made entirely from tin

Butoxors [25]

Cans aren't entirely made of tin because of rusting. When scratched(which happens quite frequently to cans) the tin is in more danger of rusting. This is why the cans are coated in a layer of tin rather than the whole can is made of it.

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2 years ago

The circles in the diagrams below represent energy levels in an atom, and the arrows show electron (blue dot) transitions from o

Hoochie [10]

Ranking of the atom from highest to lowest is as follows:
Highest
Arrow = from outer edge to center
2nd Highest
Arrow = second closest ring to the outer edge to center
3rd Highest
Arrow = middle circle to center
Lowest
Arrow = outer edge to middle circle

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3 years ago

What two things do all matter have in common?

ELEN [110]

Answer:

mass and occupies space

Explanation:

matter is made up of mass and mass takes up space

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2 years ago

Read 2 more answers

__Al+__S —>___Al S 8 2 3

Al+S —>___Al S 8 2 3