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mina [271]
2 years ago
6

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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How much heat is added if .0948g of water is increased in temperature by .728 degrees C?
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

<em>Where Q is change in heat</em>

<em>m is mass of substance (In this case, 0.0948g of water)</em>

<em>ΔT = 0.728°C</em>

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

Replacing:

q = 0.0948g*0.728°C*4.184J/g°C

q = 0.289J of heat are added

5 0
2 years ago
Question 4 point
Ronch [10]

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

Which is not among the choices.

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The answer is chemical weathering
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Typically, your percent yield is ______ than 100% because ___________________________.
masya89 [10]

Reasons why percent yield is more than 100

Typically, percent yields are understandably less than 100% because of the reasons indicated earlier. However, percent yields greater than 100% are possible if the measured product of the reaction contains impurities that cause its mass to be greater than it actually would be if the product was pure.

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Answer:

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cell division is the enlargement or division of cell in order for growth to occur

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