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3 years ago

5

How would technology affect the population growth rate?

2 answers:

Rasek [7]3 years ago

8 0

B. It would lead to rapid population increase with high birth rates and low death rates due to the medical advancements

nexus9112 [7]3 years ago

6 0

Answer:

B. It would lead to rapid population increase with high birthrates and lower death rates.

Explanation:

Technology will increase birth rate and decrease death rate. Advancement in medical care allows better prenatal care, facilitates intensive care for children born with critical diseases, improved medications and baby food is also critical in saving the life of babies born. Also several vaccinations are available to prevent children from succumbing to life threatening diseases. In vitro fertilization is facilitating birth rates.

Additionally, better healthcare facilities are available at old age such as stem cell therapy, early diagnosis of cancer, treatment for Alzheimer’s and more.

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Mkey [24]

Answer:

C. $3.8\times 10^{-2}$

Explanation:

We are given that

Initial concentration, $[A]_o=4.3 M$

First half life, $t_{\frac{1}{2}}=56$ minutes

Second half life, $t'_{\frac{1}{2}}=28$ minutes

We have to find K.

The given reaction is zero order reaction.

We know that for zero order reaction

$t_{\frac{1}{2}}=\frac{[A]_o}{2k}$

Using the formula

$56=\frac{4.3}{2k}$

$k=\frac{4.3}{2\times 56}$

$k=3.8\times 10^{-2}$

Hence, option C is correct.

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3 years ago

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mixer [17]

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3 years ago

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A sample of a gas has a volume of 852 mL at 298 K. If the gas is cooled to 200K, what would the new volume be?

Colt1911 [192]

Answer:

571.81 mL

Explanation:

Assuming constant pressure, we can solve this problem by using <em>Charles' law</em>, which states that at constant pressure:

V₁T₂=V₂T₁

Where in this case:

V₁ = 852 mL

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V₂ = ?

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What is the boiling point of a 0.75-molal solution of a non-volatile non-electrolyte solute in water? Kb for water = 0.52 degree

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4 years ago

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earnstyle [38]

Answer:

B 2

Explanation:

I checked it and it’s right hope this helps!!

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3 years ago