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3 years ago

14

(Lewis Dot Structures):

1 answer:

atroni [7]3 years ago

8 0

Answer:

The resolution is shown in the attached picture.

Explanation:

N₂ is a molecule formed by a triple bond between two nitrogen atoms. It has a linear geometry and shape and is non-polar.

SO₃²⁻ is a molecule formed by one double bond between the sulphur atom and one of the oxygens and two single bonds betwenn the sulphur atom and the other two oxygen atoms. The AXE notation is AX₃E and the geometry is trigonal pyramidal. The molecule is polar.

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When you connect your evidence to your claim you are using your

trapecia [35]

Answer:

2. reasoning

Explanation:

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2 years ago

Which of the following group 7A elements is the most reactive ?

Scrat [10]

C) Fluorine is the most reactive among halogens

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3 years ago

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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

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3 years ago

What chemical changes occur during photosynthesis

Yakvenalex [24]

Answer:

Water and carbon dioxide combine to form glucose and oxygen.

I hope this helped :)

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3 years ago

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A reaction between liquid reactants takes place at −10.0°C in a sealed, evacuated vessel with a measured volume of 45.0L. Measur

maks197457 [2]

Answer: 0.0624 atm

Explanation:-

According to the ideal gas equation:

$PV=nRT$

P = Pressure of the gas = ?

V= Volume of the gas = 45.0 L

T= Temperature of the gas = -10.0°C = 263 K $0^00C=273K$

R= Gas constant = 0.0821 atmL/K mol

n= moles of gas

Moles of gas= $\frac{\text{ given mass}}{\text{ molar mass}}= \frac{19.0g}{146g/mole}=0.130moles$

$P=\frac{nRT}{V}=\frac{0.130\times 0.0821\times 263}{45.0}=0.0624atm$

The pressure of sulfur hexafluoride gas in the reaction vessel after the reaction is 0.0624 atm

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3 years ago