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cricket20 [7]
3 years ago
15

Fertilizer is sold in 100 pound bags labelled with the amount of nitrogen ( N), phosphoric acid ( P2O5), and potash ( K2O) prese

nt. The mixture of these nutrients varies from one type of fertilizer to the next. For example, a 100 pound bag of Vigoro Ultra Turf fertilizer contains 29 pounds of nitrogen, 3 pounds of phosphoric acid, and 4 pounds of potash. Another type of fertilizer, Parkerâs Premium Starter, has 18 pounds of nitrogen, 25 pounds of phosphoric acid, and 6 pounds of potash per 100 pounds. Determine the amount of each type required to yield a mixture containing the 177 pounds of nitrogen, 134 pounds of phosphoric acid, and 42 pounds of potash.
Chemistry
1 answer:
Mama L [17]3 years ago
3 0

Answer:

You need to add 3 100 pound bags of  Parkerâs Premium Starter and 5 100 pound bags of Vigoro Ultra Turf fertilizer

Explanation:

You can obtain 3 equations. One for each compound:

For N:

177 pounds = 29x + 18y <em>(1) </em>

<em>-</em><em>Where x are bags of Vigoro Ultra Turf fertilizer</em><em> </em><em>and y are bags of  </em>Parkerâs Premium Starte-

For P₂O₅:

134 pounds = 3x + 25y <em>(2)</em>

For K₂O:

42 pounds = 4x + 6y <em>(3)</em>

Replacing (1) in (2):

134 = (531/29 - 54y/29) + 25y

3355/29 = 671y/29

<em>y = 5 bags</em>

Thus,

<em>x = 3 bags</em>

You can replace in each equation to prove that this is the right result.

I hope it helps!

<em></em>

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Answer:

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Based on this explanation, find the answers to the hypothesis, independent variable, dependent variable, constant, and control groups to each question.

2. Dependent variable: How easy it is to remember

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5. Hypothesis: IF caffeine is taken, then the blood pressure will be increased or raised.

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3 years ago
How many moles of gas does it take to occupy 120 L at a pressure of 233 kPa and a temperature of 340 K?
natka813 [3]

A would be correct have a nice day.


5 0
3 years ago
Read 2 more answers
(2 pts) The solubility of InF3 is 4.0 x 10-2 g/100 mL. a) What is the Ksp? Include the chemical equation and Ksp expression. MW
Aleonysh [2.5K]

Answer:

a) Ksp = 7.9x10⁻¹⁰

b) Solubility is 6.31x10⁻⁶M

Explanation:

a) InF₃ in water produce:

InF₃ ⇄ In⁺³ + 3F⁻

And Ksp is defined as:

Ksp = [In⁺³] [F⁻]³

4.0x10⁻²g / 100mL of InF₃ are:

4.0x10⁻²g / 100mL ₓ (1mol / 172g) ₓ (100mL / 0.1L) = <em>2.3x10⁻³M  InF₃. </em>Thus:

[In⁺³] = 2.3x10⁻³M  InF₃ × (1 mol In⁺³ / mol InF₃) = 2.3x10⁻³M  In⁺³

[F⁻] = 2.3x10⁻³M  InF₃ × (3 mol F⁻ / mol InF₃) = 7.0x10⁻³M F⁻

Replacing these values in Ksp formula:

Ksp = [2.3x10⁻³M  In⁺³] × [7.0x10⁻³M F⁻]³ = <em>7.9x10⁻¹⁰</em>

<em></em>

b) 0.05 moles of F⁻ produce solubility of InF₃ decrease to:

7.9x10⁻¹⁰ = [x] [0.05 + 3x]³

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Solving from x:

x = -0.018 → False solution, there is no negative concentrations.

x = 6.31x10⁻⁶M → Right answer.

Thus, <em>solubility is 6.31x10⁻⁶M</em>

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Answer:

Explanation:

Hello,

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Taking into account that the reaction produces energy, ΔH°rxn is negative. No, solving for ΔfHC8H18:

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Best regards.

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3 years ago
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