Answer:
The correct answer is B) El Nino/La Nina
Explanation:
El Nino and La Nina are climate patterns that can cause modification to the global weather conditions. They are present in the Pacific Ocean.
El Nino is Spanish for Little Boy. It is characterised by warm weather, while La Nina in Spanish refers to Little Girl. La Nina is characterized by cool/cold currents.
Cheers
Objects on earth are held by the gravity of the Moon.
Answer:
- <u><em>9.01 g of fertilizer</em></u>
Explanation:
Assume initially that the amount in grams of the multinutrient fertilizer is 100 g, and calculate the amount of nitrogen supplied by every compound present in these 100 g of fertilizer.
<u>1) Urea (CH₄N₂O)</u>:
- Molar mass of urea: 60.06 g/mol
- Atomic mass of N: 14.007 g/mol
- Total mass of N in the formula: 2 × 14.007 g/mol = 28.014 g/mol
- Amount of N in 100 g of compound: 100 g × 54.8% × 28.014 g / 60.06 g = 25.56 g
<u>2) KNO₃</u>
- Molar mass of KNO₃: 101.1032 g/mol
- Atomic mass of N: 14.007 g/ mol
- Total mass of N in the formula: 14.007 g/mol
- Amount of N in 100 of the compound: 100 g × 26.3% × 14.007 / 101.1032 = 3.64 g
<u>3) (NH₄)₂PO₄</u>
- Molar mass of (NH₄)₂PO₄: 132.06 g/mol
- Atomic mass of N: 14.007 g/ mol
- Total mass of N in the formula: 2×14.007 g/mol = 28.014 g/mol
- Amount of N in 100 of the compound: 100 g × 14.1% × 14.007 / 132.06 = 2.99 g
4) <u>Total mass of N in 100 g of fertilizer</u>:
Add all the amounts of N obtained above
- 25.56g + 3.69 g + 2.99 g = 32.19 g of N
5) <u>Mass of fertilizer that should be applied to provide 2.90 g of N to a plant</u>.
Set a proportion:
- 32.19 g of N / 100 g of fertilizer = 2.90 g of N / X
Solve for X:
- X = 2.90 g of N × 100 g of fertilizer / 32.19 g of N = 9.01 g of fertilizer
That is the answer: 9.01 g of fertilizer should be applied to provide 2.90g of N to a plant.
Answer:
that is answer
Explanation:
symbol - elements - mass percent
S. - sulfur. - 21.945%
F. - fluorum. - 78.047%
