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Novay_Z [31]
3 years ago
9

42.What is the source of the electric current produced by a voltaic cell?

Chemistry
1 answer:
Marat540 [252]3 years ago
8 0
A spontaneous oxidation-reduction reaction
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Use the following balanced reaction to solve:
Naily [24]

Answer:  60.7 g of PH_3 will be formed.

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given volume}}{\text{Molar volume}}    

\text{Moles of} H_2=\frac{60L}{22.4L}=2.68moles

The balanced chemical reaction is

P_4(s)+6H_2(g)\rightarrow 4PH_3(g)

H_2 is the limiting reagent as it limits the formation of product and P_4 is the excess reagent.

According to stoichiometry :

6 moles of H_2 produce = 4 moles of PH_3

Thus 2.68 moles of H_2 will produce=\frac{4}{6}\times 2.68=1.79moles  of PH_3

Mass of PH_3=moles\times {\text {Molar mass}}=1.79moles\times 33.9g/mol=60.7g

Thus 60.7 g of PH_3 will be formed by reactiong 60 L of hydrogen gas with an excess of P_4

3 0
2 years ago
12. In the modern periodic table, which of the following describes the elements with similar
V125BC [204]
B. same group I believe
8 0
3 years ago
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The amount of matter in a object is referred as:
mestny [16]
Volume is the thing
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4 0
3 years ago
Identify each of the highlighted materials as an element, a compound, or a mixture, and explain your reasoning.
Reika [66]

Answer:

These are compounds.

Explanation:

As it is formed by chemically bonding of two elements C ( carbon) and H (hydrogen) .

  1. Its not a mixture because mixture is Just dispersed of diferrent elements or a compound which are not in fix ratio
4 0
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A mixture which contains more than one phase is called .
kirza4 [7]
This is a heterogeneous mixture. 

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3 years ago
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