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2 years ago

Balance the equations

Chemistry

1 answer:

OLga [1]2 years ago

3 0

Answer: a) $H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O$

b) $PCl_3+3H_2O\rightarrow P(OH)_3+3HCl$

c) $2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side.

The balanced chemical equations are :

$H_3PO_4+3NaOH\rightarrow Na_3PO_4+3H_2O$

$PCl_3+3H_2O\rightarrow P(OH)_3+3HCl$

$2Al+3H_2SO_4\rightarrow Al_2(SO_4)_3+3H_2$

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Verdich [7]

Answer:

0.289J of heat are added

Explanation:

We can relate the change in heat of a substance with its increasing in temperature using the equation:

q = m*ΔT*S

Where Q is change in heat

m is mass of substance (In this case, 0.0948g of water)

ΔT = 0.728°C

S is specific heat (For water, 4.184J/g°C)

Replacing:

q = 0.0948g*0.728°C*4.184J/g°C

q = 0.289J of heat are added

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2 years ago

Question 4 point

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Answer:

$5393.4gH_2O$

Explanation:

Hello there!

In this case, for the described chemical reaction, we can write:

$CH_4+2O_2\rightarrow CO_2+2H_2O$

Thus, by considering the 1:2 mole ratio of methane to water, and the molar mass of the latter (18.02 g/mol), the following is useful to calculate the mass of water that is produced:

$149.65molCH_4*\frac{2molH_2O}{1molCH_4} *\frac{18.02gH_2O}{1molH_2O}$

Which is equal to:

$5393.4gH_2O$

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Typically, your percent yield is ______ than 100% because ___________________________.

masya89 [10]

Reasons why percent yield is more than 100

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