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lidiya [134]
3 years ago
6

Why does the state of matter change for the alliance family?

Chemistry
2 answers:
Andru [333]3 years ago
5 0

Answer:

i

Explanation:

in organic chemistry an alkane also known as paraffin the standard entalphy changes of combustion change in cH for alkane increase by about 650 kJ/mol both of these process raise the octane number of the substance

gtnhenbr [62]3 years ago
3 0
U done got the answer
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How to balance Mg3n2+H20>>Mg(oh)2+Nh3?
alexandr1967 [171]
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3 years ago
Calculate the DH°rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide. DH°f means delta or change
USPshnik [31]

Answer: +178.3 kJ

Explanation:

The chemical equation  follows:

CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

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

\Delta H^o_{rxn}=[(1\times \Delta H^o_f_{(CaO(s))})+(1\times \Delta H^0f_{CO_2}]-[(1\times \Delta H^o_f_{(CaCO_3(s))})]

We are given:

\Delta H^o_f_{(CaO(s))}=-635.1kJ/mol\\\Delta H^o_f_{(CaCO_3(s))}=-1206.9kJ/mol\\\Delta H^o_f_{(CO_2(g))}=-393.5kJ/mol\\\Delta H^o_{rxn}=?

Putting values in above equation, we get:

\Delta H^o_{rxn}=[(1\times (-635.1))+(1\times (-393.5))]-[(1\times (-1206.9))]

The DH°rxn for the decomposition of calcium carbonate to calcium oxide and carbon dioxide is +178.3 kJ

5 0
2 years ago
Pls help! Will mark brainliest! 55 Points!​
GenaCL600 [577]

Answer:

7cm square is the answer

Hope it's helpful

6 0
3 years ago
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Write the chemical symbols for three different atomic cations that all have 14 protons
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The symbols for three different cations with 14 protons are Si²⁺, Si⁴⁺, and Si³⁺.

An element with 14 protons must be <em>silicon, S</em>i.

Its electron configuration is [Ne] 3s²3p², so it could lose up to four valence electrons.

The most likely cations are Si²⁺, Si⁴⁺, and Si³⁺ (or Si⁺).

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3 years ago
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What is the best reason for the difference in properties of LiCL and C6H14O
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3 years ago
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