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3 years ago

Highest ionization energy: Li, Be, B

Chemistry

1 answer:

Ad libitum [116K]3 years ago

3 0

Hello!

On the periodic table, as we go down the periodic table, the ionization energy decreases, but as we go across the periodic table (left to right), the ionization increases.

On the periodic table, lithium (Li) is located in column one, beryllium (Be) is located in column two, and (B) boron is located in column 13. As stated above, when we go across the periodic table (left to right), the ionization increases.

Therefore, the element with the highest ionization energy is Boron, or symbol B on the period table.

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Consider the following first-order reaction: A → B. The concentration of A at the start of the reaction is 4.17 M and after 4.84

valina [46]

Answer : The value of rate constant is, $0.0327s^{-1}$

Explanation :

First we have to calculate the rate constant, we use the formula :

Expression for rate law for first order kinetics is given by:

$k=\frac{2.303}{t}\log\frac{a}{a-x}$

where,

k = rate constant = ?

t = time passed by the sample = 4.84 s

a = initial concentration = 4.17 M

a - x = concentration after time 4.84 s = 3.56 M

Now put all the given values in above equation, we get

$k=\frac{2.303}{4.84}\log\frac{4.17}{3.56}$

$k=0.0327s^{-1}$

Therefore, the value of rate constant is, $0.0327s^{-1}$

4 0

3 years ago

What are the correct answers to these questions?

DerKrebs [107]

Uh to warn you it doesn't show anything on here=(

4 0

3 years ago

How many moles are in 7.8g of CaO?

Bess [88]

This compound is also known as Calcium Oxide. The SI base unit for amount of substance is the mole. 1 grams CaO is equal to 0.017832495800447 mole. Note that rounding errors may occur, so always check the results.

Hope I helped :)

4 0

3 years ago

Potassium hydrogen phthalate is a solid, monoprotic acid frequently used in the laboratory as a primary standard. It has the unw

Sauron [17]

Answer:

0.1472 mol/L is the concentration of the barium hydroxide solution.

Explanation:

$2KHC_8H_4O_4+Ba(OH)_2\rightarrow Ba(KC_8H_4O_4)_2+2H_2O$

Mass of potassium hydrogen phthalate = 2.050 g

Molar mass of potassium hydrogen phthalate = $\frac{2.050 g}{204.2 g/mol}=0.01004 mol$

According to reaction , 2 moles of potassium hydrogen phthalate reacts with 1 mole of barium hydroxide, then 0.01004 moles of potassium hydrogen phthalate will :

$\frac{1}{2}\times 0.01004 mol=0.005020 mol$ of barium hydroxide