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Monica [59]
3 years ago
5

Nearly all the energy from the earth receives from the sun is used in photosynthesis

Chemistry
1 answer:
dezoksy [38]3 years ago
4 0

Answer: It is false because we use alot of it to with solar power.

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Which of the following pair of elements could not react to form an ionic compound
goldenfox [79]

Answer:

c and o

Explanation:

Carbon and Oxygen cannot react to form an ionic compound because the two elements are non-metals.

  • To form an ionic bond, a metal combines with a non-metal through electrostatic attraction of oppositely charged ions.
  • This leads the bond formation.
  • Carbon is a non-metal, with oxygen, they will prefer to form a covalent bond where they share their electrons

7 0
3 years ago
Which term describes boron?<br> A. Metal<br> B. Metalloid<br> C. Noble Gas<br> D. Nonmetal
enyata [817]

Answer:

Boron is Nonmetal

Explanation:

hope it's helped

3 0
3 years ago
Need help fast please I am timed and giving 47 points.
Leokris [45]

Answer:

C

Explanation:

6 0
3 years ago
Read 2 more answers
A bag of fertilizer is labeled 10-20-20. What is the actual percentage of phosphorus in the fertilizer?
aleksandr82 [10.1K]

Answer:

20% of phosphorus

Explanation:

A fertilizer is used to improve the fertility of soils. Most fertilizers contains the element nitrogen, phosphorus and potassium.

They are often designated NPK fertilizers.

  Now we know that the numbers 10-20-20 depicts the nitrogen-phosphorus and potassium content of the fertilizer.

From the designation,

    The actual percentage is 20% of phosphorus.

                                               10%  of nitrogen

                                                20% of potassium

8 0
3 years ago
On a flight to Europe, you notice that the packages of peanuts are puffed up. Why? 1. The jet is over-pressurized at high altitu
hodyreva [135]

Answer:

The correct answer is;

5. They were packaged at a higher pressure on the ground, thus causing the gas inside the packages to expand in the sky where the jet is at a lower pressure.

Explanation:

According to Boyle's law, the pressure of a given mass of gas is inversely proportional to it volume at constant temperature

P₁·V₁ = P₂·V₂

At the factories, the peanuts are packaged at atmospheric conditions whereby P₁ = 1 atm, however, the pressure of the air in the atmosphere decreases with altitude as such the pressure in the airplane jet is about a fraction of hat on the ground by about a factor of 0.7.

Therefore P₂ = 0.7 atm and we have

V₂ = P₁·V₁/P₂ = 1 atm×V₁/0.7 atm = 1.43·V₁

The volume increases at high altitudes

7 0
3 years ago
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