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Daniel [21]
2 years ago
7

Q u i c k p l e a s e What kind of reaction is represented here: H2CO3 --> H2O + CO2

Chemistry
1 answer:
snow_tiger [21]2 years ago
5 0

Answer:

Decomposition

Explanation:

A molecule  breaks up into 2 simpler molecules

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2 years ago
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Find the enthalpy of neutralization of HCl and NaOH. 87 cm3 of 1.6 mol dm-3 hydrochloric acid was neutralized by 87 cm3 of 1.6 m
olga nikolaevna [1]

Explanation:

The reaction equation for the given reaction will be as follows.

               HCl + NaOH \rightarrow NaCl + H_{2}O

Each mole of both HCl and NaOH gives one mole of water.

Also, it is given that 1 liter of NaOH and HCl solution contains 1.6 mol dm^{-3} of NaOH (HCl).

It is known that 1 cm^{3} = 0.001 liter. So, 87 cm^{3} = 0.087 liter.

Hence, number of moles of water obtained from the given reaction are as follows.

                  0.087 liter × 1.6 mol = 0.1392 moles

            No. of moles = \frac{mass}{molar mass of water}

                0.1392 moles = \frac{mass}{18 g/mol}

                       mass = 2.5056 g

Now, volume of water present before the reaction is 2 \times 0.087 liter = 0.174 liter or 0.174 Kg (as density is 1 Kg/cm^{3}) or 174 g (as 1 kg = 1000 g).

Therefore, total weight of water present = 2.5056 g + 174 g = 176.5056 g

Formula to calculate enthalpy of neutralization is as follows.

                Enthalpy of neutralization = mS \Delta T

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where,            m = mass

                       S = specific heat capacity

                   \Delta T = change in temperature

Putting the given values in the formula as follows.

       Enthalpy of neutralization = mS \Delta T

                     = 176.5056 g \times 4.18 J/K g \times (317.4 K - 298 K)              

                                                           = 14333.73 J

   or,                                                    = 14.33 kJ

Thus, we can conclude that the enthalpy of neutralization of given reaction is 14.33 kJ.

5 0
3 years ago
calculate the change in enthalpy, if the reactants have an enthalpy of 315 kj and the products have an enthalpy of 375 kj
sineoko [7]

25% is the answer, i believe.

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3 years ago
How do experiments help scientists learn about the world?
Alborosie

B. Experiments test the scientists' ideas.

Explanation:

Experiments helps scientist test the ideas.

Experiment is simply an act of performing a controlled test about an idea.

  • Before an experiment is made, observations using senses must be deduced from the environment at first.
  • Observations leads to the formulation of hypothesis.
  • Hypothesis are more or less a scientific predictions.
  • Most hypothesis presents variables that can be tested.
  • The test of a hypothesis is an experiment.
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Experiment brainly.com/question/5096428

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Alkali metals is chemicals elements found In the Periodic tables Alkali metals have included Sodium Potassium Rubidium Cesium And Francium as for Earth metals they are beryllium magnesium calcium strontium barium and radium.
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