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3 years ago

What trend does the first ionization energy follow, going down the periodic table?

Chemistry

1 answer:

photoshop1234 [79]3 years ago

7 0

Answer:

going down the periodic table atomic size increases,electronegativity and ionization decreases going down

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Two scientists, Tara and Victor, work in the same scientific field of study. Victor asks Tara to review a research paper that he

erik [133]

Answer:

Tara does not think that Victor’s predictions are likely.

Explanation:

In order to submit the paper, he would need to be as accurate as he possible can, is Tara told him to do it again, it means that he may have made a few mistakes.

7 0

3 years ago

What problems do flooding and extreme weather cause?

mafiozo [28]

Answer:

Explanation:

Sometimes weather is extreme, causing destruction and death. Too much rain can cause flooding. Too much hot weather for long periods of time without any rain can cause drought. Huge storms with strong winds, such as hurricanes and tornadoes, can do a great amount of damage to buildings and crops.

<em>hope this helps you~</em>

4 0

3 years ago

Read 2 more answers

Fluoride ion is poisonous in relatively low amounts: 0.2 g of F- per 70 kg of body weight can cause death. Nevertheless, in orde

svetoff [14.1K]

Answer:

$\boxed{\text{(a) 14 L; (b) 711 kg}}$

Explanation:

(a) Litres of water

$\text{Mass of F}^{-} = 8.5 \times 10^{7}\text{ gal} \times \dfrac{\text{0.2 mg F}^{-}}{\text{1 kg}} = \textbf{14 mg F}^{-}\\\\\text{Volume of water} = \text{14 mg F}^{-} \times \dfrac{\text{1 L water}}{\text{1 mg F}^{-}} = \textbf{14 L water}\\\\\text{The person would have to consume $\boxed{\textbf{14 L}}$ of water per day}$

(b) Mass of NaF

$\text{Volume} =8.5 \times 10^{7} \text{gal} \times \dfrac{\text{3.785 L}}{\text{1 gal}} = 3.22 \times 10^{8}\text{ L}\\\\\text{Milligrams of F}^{-} = 3.22 \times 10^{8}\text{ L} \times \dfrac{\text{ 1 mg F}^{-}}{\text{1 L}} = 3.22 \times 10^{8}\text{ mg F}^{-}\\\\\text{kilograms of F}^{-} = 3.22 \times 10^{8}\text{ mg F}^{-} \times \dfrac{\text{1 mg F}^{-}}{10^{6}\text{kg F⁻}} = \text{322 kg F}^{-}$

1 kmol of NaF (41.99 kg) contains 19.00 kg of F⁻.

$\text{Kilograms of NaF}= \text{322 kg F}^{-} \times \dfrac{\text{41.99 kg NaF}}{\text{19.00 kg F}^{-}} = \text{711 kg NaF}\\\\\text{It will take } \boxed{\textbf{711 kg}} \text{ of NaF to treat the reservoir}$

7 0

3 years ago

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Calculating the expected pH of the buffer solution: Given that the pKa for Acetic Acid is 4.77, calculate the expected pH of the

ser-zykov [4K]

Answer:

$pH=4.77$

Explanation:

From the question we are told that:

pKa for Acetic Acid $pK_a= 4.77$

Therefore

For Equal Concentration of acetic acid and acetatic ion

$CH_3COOH=CH_3COO^-$

Generally the Henderson's equation for pH value is mathematically given by

$pH=pK_a+log\frac{base}{acid}$

$pH=4.77+log\frac{CH_3COO^-}{CH_3COOH}$

$pH=4.77+log1$

$pH=4.77$

5 0

3 years ago

How does the revolution of the moon affect its appearance?<br><br> Pls hurry

lyudmila [28]

Answer:

Because the moon rotates as it revolves around the Earth, we only ever see on side of the moon (That is why we call the other side the "dark side of the moon").

Hope this was the answer that you were looking for!!

3 0

3 years ago