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SIZIF [17.4K]
4 years ago
11

In this thermochemical reaction, what does the coefficient ½ represent?

Chemistry
1 answer:
timurjin [86]4 years ago
3 0
A thermochemical reaction is a chemical reaction with an additional information of the heat of reaction. For example, this is the thermochemical reaction for the combustion of hydrogen gas:

H₂ (g) + 1/2 O₂ (g) → H₂O (l)         ΔH = -285.8 kJ

The coefficient 1/2 represents the number of moles of O₂ needed to combust 1 mole of H₂ gas in order to yield one mole of water.
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What are the products of a neutralization reaction?
katovenus [111]

Answer:

Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water. So OPTION B IS CORRECT

Explanation:

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yuradex [85]

Answer:

D

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3 years ago
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The compound XCl is classified as Ionic if x represents the element?
puteri [66]
Well since chlorine upon receiving a valence electron from the X element, we would know that the element would be a metal, based on the charge of Cl, after it receives a valence electron is -1, the metal would have to give 1 valence electron as well, and thus the possible elements can be any metal within the group 1 of the periodic table of elements. Lithium, Potassium etc.
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4 years ago
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If 0.507J of heat leads to a 0.007 degree C change in water, what mass is present?
Ivanshal [37]

Answer:

17.3 g

Explanation:

<u>Given the following data;</u>

  • Quantity of heat, Q = 0.507 J
  • Temperature = 0.007°C
  • Specific heat capacity of water = 4.2 J/g°C

Mathematically, Heat capacity is given by the formula;

Q = MCT

Where;

  • Q represents the heat capacity or quantity of heat.
  • M represents the mass of an object.
  • C represents the specific heat capacity of water.
  • T represents the temperature.

Making "M" the subject of formula, we have;

Mass, \ m = \frac {Q}{CT}

Substituting the values into the formula, we have;

Mass, \ m = \frac {0.507}{0.007*4.2}

Mass, \ m = \frac {0.507}{0.0294}

<em>Mass, m = 17.3 grams</em>

3 0
3 years ago
There is a gas at 780 mm of Hg, in a volume of 5 liters and a temperature of 37 ​ C, the volume is changed to 5.5 liters and the
HACTEHA [7]

Answer:

32.8 C

Explanation:

- Use combined gas law formula and rearrange.

- Hope that helped! Please let me know if you need further explanation.

6 0
4 years ago
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