Complete the equation for the dissociation of Na2CO3(aq).Omit water from the equation because it is understood to be present.

If 8.700 g of c6h6 is burned and the heat produced from the burning is added to 5691 g of water at 21 Â°c, what is the final tem

leonid [27]

C₆H₆ is benzene which has a molar mass of 78 g/mol. When benzene is burned, the reaction is called combustion. The heat produced in this reaction is called the heat of combustion. For benzene, the heat of combustion is -3271 kJ/mol.

Heat of benzene = (8.7 g)(1 mol/78 g)(-3271 kJ/mol) = -364.84 kJ

By conservation of energy,
Heat of benzene = - Heat of water
where
Heat of Water = mCp(Tf - T₀)
where Cp for water is 4.187 kJ/kg·°C

Thus,

-364.84 kJ = -(5691 g)(1 kg/1000 g)(4.187 kJ/kg·°C)(Tf - 21)
<em>Tf = 36.31°C</em>

8 0

3 years ago

Noah is conducting a science experiment and needs to analyze iron and sulfur. Which of the following will he compare to determin

qaws [65]

Answer:

molecular mass of each substance

Explanation:

7 0

2 years ago

Identify ALL the possible mol ratio from<br> this balanced equation:

grandymaker [24]

Answer:

$\frac{1 mole of N_{2} }{3 moles of H_{2} }$

Explanation:

The equation of the reaction:

Nitrogen gas N₂ reacts with Hydrogen as H₂ to produce ammonia NH₃;

N₂ + H₂ → NH₃

The balanced equation is ;

N₂ + 3H₂ → 2NH₃

The mole ratio is the ratio of the coefficients of the combining reactants;

1 mole of N₂ combines with 3 mole of H₂;

So;

$\frac{1 mole of N_{2} }{3 moles of H_{2} }$

3 0

3 years ago

What causes an acid or base to dissociate

olasank [31]

The polar water molecules pull apart the ions of the acid or base.

6 0

3 years ago

Calculate how many moles of nh3 form when each quantity of reactant completely reacts?

anygoal [31]

3.6 moles $NH_{3}$ required when each quantity of reactant completely reacts.

The ratio of the mole quantities of any two compounds present in a balanced chemical reaction is known as the mole ratio. A reaction's product yield can be predicted using mole ratios, as can the amount of reactant required to produce a specific amount of result.

The balanced chemical equation is :

$3N_{2} H_{4}$ (l) → $4NH_{3}$ (g) + $N_{2}$ (g)