All categories

4 years ago

Balance the combustion reaction between propane and oxygen. If a coefficient of "1" is required, choose "blank" for that box.

2 answers:

7 0

The combustion reaction between propane and oxygen is C3H8 + 5O2 → 3CO2 + 4H2O. The key in the balancing of chemical reaction is to make sure that you got the exact chemical formula of the substance that is reacting and the yielded product. After getting the formula, identify first the hardest element/atom to be balanced such as Na, Zn, Cl, etc. Then proceed to the easier ones such as O, H. Make sure to not the atoms present in the molecule of the substance.

natali 33 [55]4 years ago

6 0

Answer:

$\huge \boxed{\mathrm{C_3 H_8 +5O_2 \Rightarrow 3CO_2 +4 H_2 O}}$

$\rule[225]{225}{2}$

Explanation:

$\sf C_3 H_8 +O_2 \Rightarrow CO_2 + H_2 O$

Balancing Carbon atoms on the right side,

$\sf C_3 H_8 +O_2 \Rightarrow 3CO_2 + H_2 O$

Balancing Hydrogen atoms on the right side,

$\sf C_3 H_8 +O_2 \Rightarrow 3CO_2 +4 H_2 O$

Balancing Oxygen atoms on the left side,

$\sf C_3 H_8 +5O_2 \Rightarrow 3CO_2 +4 H_2 O$

$\rule[225]{225}{2}$

You might be interested in

Plzzzzzzzzz help

butalik [34]

Explanation:

Since you're 16, you have to calculate how many seconds you've lived.

16 years × 31,536,000= 504,576,000 pennies.

504,576,000÷58 (for the amount of gold) = 8699586.2069 grams

Then go on from there. Hope that helped!

6 0

3 years ago

Rubbing alcohol is a solution of 70 percent alcohol and 30 percent water. in the alcohol solution which is the solute and which

jolli1 [7]

Water: solute
alcohol: solvent

solution: a uniform mixture that has a solvent and at least one solute
solvent: the part of the solution with the largest amt
solute: the substance that is dissolved in a solution

6 0

4 years ago

Matter does NOT exist in which form?

Sergeu [11.5K]

Answer:

vacuum

Explanation:

vacuum is the form by which matter cant exist

3 0

4 years ago

Consider the reaction 4HCl(g) + O2(g)2H2O(g) + 2Cl2(g) Using standard thermodynamic data at 298K, calculate the entropy change f

Ulleksa [173]

<u>Answer:</u> The value of $\Delta S^o$ for the surrounding when given amount of HCl gas is reacted is 73.21 J/K

<u>Explanation:</u>

Entropy change is defined as the difference in entropy of all the product and the reactants each multiplied with their respective number of moles.

The equation used to calculate entropy change is of a reaction is:

$\Delta S^o_{rxn}=\sum [n\times \Delta S^o_{(product)}]-\sum [n\times \Delta S^o_{(reactant)}]$

For the given chemical reaction:

$4HCl(g)+O_2(g)\rightarrow 2H_2O(g)+2Cl_2(g)$

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

$\Delta S^o_{rxn}=[(2\times \Delta S^o_{(Cl_2(g))})+(2\times \Delta S^o_{(H_2O(g))})]-[(4\times \Delta S^o_{(HCl(g))})+(1\times \Delta S^o_{(O_2(g))})]$

We are given:

$\Delta S^o_{(O_2(g))}=205.14J/K.mol\\\Delta So_{(HCl(g))}=186.91J/K.mol\\\Delta S^o_{(Cl_2(g))}=223.07J/K.mol\\\Delta S^o_{(H_2O(g))}=188.82J/K.mol$

Putting values in above equation, we get:

$\Delta S^o_{rxn}=[(2\times (223.07))+(2\times (188.82))]-[(4\times (186.91))+(1\times (205.14))]\\\\\Delta S^o_{rxn}=-129J/K$

Entropy change of the surrounding = - (Entropy change of the system) = -(-129) J/K = 129 J/K

We are given:

Moles of HCl gas reacted = 2.27 moles

By Stoichiometry of the reaction:

When 4 mole of HCl gas is reacted, the entropy change of the surrounding will be 129 J/K

So, when 2.27 moles of HCl gas is reacted, the entropy change of the surrounding will be = $\frac{129}{4}\times 2.27=73.21J/K$

Hence, the value of $\Delta S^o$ for the surrounding when given amount of HCl gas is reacted is 73.21 J/K

3 0

3 years ago

Why was Niels Bohr’s atomic model superior to all the earlier models?

sergeinik [125]

Answer:

Explanation:

The Niels Bohr's atomic model superior to all the earlier models is because it showed how the electron could orbit the nucleus without falling into it

7 0

3 years ago