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Brut [27]
3 years ago
15

Select the correct answer.

Chemistry
1 answer:
Burka [1]3 years ago
8 0
C. Tetraphosphorus trisulfide
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Calculate the number of atoms in 0.316 mol of phosphorus
Nikitich [7]

Answer:

\large \boxed {7.61 \times 10^{23}\text{ atoms}}

Explanation:

1. Molecules of P₄

The molecular formula of phosphorus is P₄.

\text{Molecules of P}_{4} = \text{0.316 mol P}_{4} \, \times \dfrac{ 6.022  \times 10^{23}\text{ molecules P}_{4}}{\text{1 mol P}_{4}} = 1.90 \times 10^{23}\text{ molecules P}_{4}

2. Atoms of P

One molecule of phosphorus contains four P atoms.

\text{Atoms of P} = 1.90 \times 10^{23}\text{ molecules P}_{4} \times \dfrac{\text{4 atoms P}}{\text{1 molecule P}_{4}}\\\\= \large \boxed{\mathbf{7.61 \times 10^{23}}\textbf{ atoms P}}

5 0
3 years ago
Identify each example on the diagram as a carbon source or a carbon sink.
mario62 [17]

Plants and animals RE a carbon source during respiration. they take in Oxygen and give out Carbon (IV) oxide as a by product.  Combustion of fossil fuels is also source of carbon (IV) Oxide.

Formation of fossils from dead plants and animals is a carbon sink. photosynthesis is also a carbon sink as plants take in carbon (IV) Oxide that is used to make food.

4 0
3 years ago
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How do human population growth trends differ between developed nations and developing nations?
Digiron [165]

Answer:

Growing population

The worlds developing regions will see 1.2 billion people added, a 20.7% increase; while the population of developed countries will increase a mere 3.3% adding 41 million to the current 1.3 billion people.

8 0
2 years ago
When compounds form, which of the following statements is true about the elements that form them?
Greeley [361]

Answer:

C. Their properties change completely.

Explanation:

The electron configurations of the elements show a periodic variation with increasing atomic number. Consequently, there are also periodic variations in physical and chemical behavior.  

When atoms interact to form a chemical bond, they combine in order to <u>achieve a more stable electron configuration.</u> As a consequence, the compounds formed exhibit completely different properties.

For example, when solid magnesium burns in air, it forms both magnesium oxide and magnesium nitride, which are gases.

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A volumetric flask contains 25.0 mL of a 14% m/V sugar solution. If 2.5 mL of this solution is added to 22.5 mL of distilled wat
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Answer:

The new solution is 1.4% m/V

Explanation:

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