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Temka [501]
3 years ago
9

The different parts of a Test Tube.

Chemistry
1 answer:
Citrus2011 [14]3 years ago
3 0

Answer: :)

Explanation:

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All modern fertilizers use PO43- as a source of phosphorus. Use your knowledge of the old methods to determine the moles of phos
tamaranim1 [39]

Answer:

The answer is 0.023 moles of phosphorus

Explanation:

The 15-15-15 fertilizer is a fertilizer of great versatility, made with nitrogen, phosphorus and potassium, which makes it one of the fertilizers most used for fertilizer in the sowing plant, thus covering the crop requirements from planting. .

This fertilizer consists of 14.25% phosphorus pentoxide (P2O5). Therefore, we have to remove 14.25% at 10 grams of 15-15-15 fertilizer to calculate the moles of phosphorus. As follows:

Grams of P2O5 = 10 g x 0.1425 = 1.425 g

We calculate the molecular weight of phosphorus. We use the periodic table:

Phosphorus molecular weight = 2 x 30.97 = 61.94 g/mol

Now we calculate the moles of phosphorus in the fertilizer:

Phosphorus moles = 1,425 g/61.94 g/mol = 0.023 moles

8 0
2 years ago
Explain how to convert a mass of compound A to a mass of compound D in words with no equations using the following reaction 2A +
leonid [27]

Answer:

Explanation:

The given reaction equation is:

                2A + 4B → C + 3D

We know the mass of compound A in the reaction above. We are to find the mass of compound D.

We simply work from the known mass to calculate the mass of the unkown compound D

Using the mole concept, we can find the unknown mass.

Procedures

  • We first find the molar mass of the compound A from the atomic units of the constituent elements.
  • We then use the molar mass of A to calculate its number of moles using the expression below:  

            Number of moles of A = \frac{mass of A}{molar mass of A}

  • Using the known number of moles of A, we can work out the number of moles of D.

           From the balanced equation of the reaction, it is shown that:

         2 moles of compound A was used up to produced 3 moles of D

  Then \frac{3}{2} x number of moles of A would give the number of moles of D

  • Now that we know the number of moles of D, we can find its mass using the expression below:

             Mass of D = number of moles of D x molar mass of D

8 0
2 years ago
The number of protons in an atom is called?
Serhud [2]
The thing that it is called is it is called the atomic number of the thing
3 0
3 years ago
Read 2 more answers
True or false.<br> A bond between a metal atom and a nonmetal atom is likely an iconic bond
vlada-n [284]
It is true...obviously

5 0
3 years ago
Is 0.7g greater than or less than 711mg?
Naya [18.7K]

<u>Solu</u><u>tion</u><u> </u><u>:</u><u>-</u>

First of all for comparing any two quantities , they must be in same units .

Here one unit is in grams and other in milligrams .

So let's convert gram to miligram .

We know that 1 gram = 1000 mg.

So , 0.7g = 0.7 × 1000 mg = 700mg .

Clearly 711mg > 700mg .

Hence 711mg is Greater than 0.7 g .

7 0
2 years ago
Read 2 more answers
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