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katrin [286]
4 years ago
8

Relation between enviromment population and devlopment​

Chemistry
2 answers:
Svetllana [295]4 years ago
7 0

Answer:

Population, environment, and development are interrelated to each other. ... It brings progress or positive change in social, economic and cultural aspects in the society and the nation. Development brings peace and security along with it. It helps to fulfill the needs and desires of every citizen of the nation.

Virty [35]4 years ago
7 0

Answer:

The relationship between population, environment and development is inseparable. ... It was also recognized that bringing about a sustainable relationship between human numbers, resources and development required activities at the local, national, regional and global levels.

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How could you use a model to show the cause-and-effect relationship between Earth's rotation and the apparent motion of the stars across the night sky?

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Gravity? or density because of the pull from the sun.

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Which of the following is an electrolyte?
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Answer: A

Explanation:

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2 years ago
Which is the following is true about the properties of the mantle?
nadya68 [22]

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it's the 2 I'm pretty sure

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3 years ago
Where do glaciers come from
marusya05 [52]

Answer:GLACIERS  ARE MADE UP OF  FALLEN SNOW OVER MILLION YEARS, IN MOST OF POLAR REGIONS  IT TURNS TO ICE AND WILL FLOW DOWNWARDS AND OUTWARDS UNDER ITS OWN PRESSURE

AND THE LARGEST GLACIER IN THE WORLD IS 60 MILES WIDE AND AROUND  270 MILES LONG.

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4 0
4 years ago
A sample of P2Cl5 contains 179 g of phosphorous, how many grams of chlorine are present? Please show step by step thx!
natima [27]

Answer:

About 512 g.

Explanation:

We are given a sample of P₂Cl₅ that contains 179 grams of phosphorus, and we want to determine the grams of chlroine that is present.

Thus, we can convert from grams of phosphorus to moles of phosphorus, moles of phosphorus to moles of chlorine, and moles of chlorine to grams of chlorine.

From the formula, there are two moles of P for every five moles of Cl. The molecular weights of P and Cl are 30.97 g/mol and 35.45 g/mol, respectively. Hence:

\displaystyle 179\text{ g P} \cdot \frac{1\text{ mol P}}{30.97\text{ g P}} \cdot \frac{5\text{ mol Cl}}{2\text{ mol P}} \cdot \frac{35.45\text{ g Cl}}{1\text{ mol Cl}} = 512\text{ g Cl}

In conclusion, there is about 512 grams of chlorine present in the sample.

Alternatively, we can mass percentages. The mass percent of phosphorus in P₂Cl₅ is:


\displaystyle \% \text{P} = \frac{2(30.97)}{5(35.45) + 2(30.97)} = 25.90\%

Because there are 179 grams of phosphorus, the total amount of sample present is:


\displaystyle \begin{aligned} 25.90\% \cdot  m_T  & = 179\text{ g P} \\ \\ m_T & = 691.1 \text{ g}\end{aligned}

Therefore, the amount of chlorine present is 691.1 g - 179 g, or about 512 g, in agreement with our above answer.

8 0
3 years ago
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