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k0ka [10]
3 years ago
10

Which of these is a compound? О co2, O2, Co

Chemistry
1 answer:
Ivanshal [37]3 years ago
8 0

Answer:

co2 is a compound.

Explanation:

Oxygen(O) is an element having atomic number 8 and mass number 16.

Carbondioxide is a compound formed by burning of carbon and organic compound and it is a colorless and odorless gas.

O2  is the molecular form of Oxygen.

Cobalt(Co) is an element having atomic number 27 and mass number 59.

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D. Genes received from the offsprings parents.

Explanation:

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3 years ago
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:

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Now we calculate the moles of phosphorus in the fertilizer:

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

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3 years ago
Sắp xếp các hợp chất: HF, HI, HBr, HCl theo chiều giảm dần tính axit.
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blondinia [14]

Answer:

the answer would be (A.) and (D.).

Explanation:

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3 years ago
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