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katovenus [111]
4 years ago
14

1. 3A + 2B + C + 2D + 20 kJ

Chemistry
1 answer:
erma4kov [3.2K]4 years ago
3 0

Answer:

a) the reverse reaction is favoured

b) the forward reaction is favoured

c) the forward reaction is favoured

Explanation:

The equation ought to have been correctly written as;

3A + 2B --------> C + 2D. ∆H =20 kJ

Actually, we can see that the reaction is endothermic since ∆H= positive.

We know that when pressure is decreased, the reaction tends towards the side with higher total volumes. There are five volumes(moles) of reactants and three volumes(moles) of products. A decrease in pressure will favour the reverse reaction.

Being an endothermic reaction, increase in temperature is known to favour the forward reaction. Similarly, removing D will drive the equilibrium forward thereby favouring the forward reaction.

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If 2.45 g of iron are placed in 1,5 L of 0.25M HCl, how many grams of FeCl2 are obtained? Identify the limiting and excess react
lys-0071 [83]

Answer:

m_{FeCl_2}=0.652gFeCl_2

Explanation:

Hello there!

In this case, according to the given information and the chemical reaction, whereby iron and hydrochloric acid react in a 1:2 mole ratio, it is firstly necessary to calculate the moles of iron (II) chloride from each reactant in order to figure out the limiting reactant:

n_{FeCl_2}=2.45gFe*\frac{1molFe}{55.845gFe}*\frac{1molFeCl_2}{1molFe}=0.0439molFeCl_2\\\\  n_{FeCl_2}=1.5L*0.25\frac{molHCl}{L} *\frac{1molHCl}{36.46gHCl}*\frac{1molFeCl_2}{2molHCl}=0.00514molFeCl_2

In such a way, we infer the maximum moles of FeCl2 product are yielded by HCl, for which it is the limiting reactant. Finally, we calculate the grams of product by using its molar mass as shown below:

m_{FeCl_2}=0.00514molFeCl_2*\frac{126.75gFeCl_2}{1molFeCl_2} \\\\m_{FeCl_2}=0.652gFeCl_2

Regards!

7 0
3 years ago
Water has a boiling point of 100°C.
SashulF [63]

Answer: higher,because when salt is dissolved bonds form between the salt ions and the water molecules

5 0
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Solid silicon and solid magnesium chloride form when silicon tetrachloride gas reacts with magnesium metal. Write a word equa- t
antiseptic1488 [7]
SiCl4 + 2Mg ---> 2Si + 2MgCl2
8 0
4 years ago
A sample of 325 mg of neon occupies 2 dm^3 at 20.0 c. use the perfect gas law to determine the pressure of the gas.
Musya8 [376]

Answer:

0.1935atm is the pressure of the gas.

Explanation:

In the problem you have the mass of Neon (You can obtain moles using molar mass), you have volume, and temperature. You can use general ideal gas law to solve pressure:

PV = nRT

P = nRT / V

<em>Where P is pressure in atm, n are moles, R is gas constant (0.082atmL/molK), T is absolute temperature (20.0°C + 273.15 = 293.15K), and V is volume in L = Volume in dm³</em>

<em />

<em>Moles gas:</em>

Molar mass Ne = 20.1797g/mol

0.325g * (1mol / 20.1797g) = 0.0161 moles

Replacing:

P = nRT / V

P = 0.0161 moles * 0.082atmL/molK * 293.15K / 2L

P = 0.1935atm is the pressure of the gas

7 0
3 years ago
Which of the following is the smaller atom: magnesium or chlorine?
Aleks04 [339]

Answer:

Chlorine atoms are smaller

Explanation:

Magnesium have more electrons than chlorine.

3 0
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