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2 years ago

PLS help!!!!!!!! Why are halogen atoms never a central atom?

Chemistry

2 answers:

Scilla [17]2 years ago

4 0

Answer:

They can’t have more than 8 valence electrons.

Explanation:

gayaneshka [121]2 years ago

3 0

They can’t have more than 8 valence electrons. Since fluorine is in group 7 it can only bound to one other molecule

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Magnesium hydroxide is added to a solution of hydrochloric acid. A reaction occurs and magnesium chloride and water are formed.

kodGreya [7K]

Answer:Magnesium (Mg) is a - reactant

Hydrogen (H2) is a - product

magnesium chloride (MgCI2) is a - product

hydrochloric acid (HCI) is a - reactant

Explanation: It’s in my notes

8 0

2 years ago

What is the technique for calculating the age of remains from the amount of C-14 that is left in once alive living things?

Marizza181 [45]

Carbon 14 dating? is that one of your choices

5 0

2 years ago

Read 2 more answers

What is the percent ionization of a 1.8 M HC2H3O2 solution (Ka = 1.8 10-5 ) at 25°C?

xz_007 [3.2K]

Answer:

B) 0.32 %

Explanation:

Given that:

$K_{a}=1.8\times 10^{-5}$

Concentration = 1.8 M

Considering the ICE table for the dissociation of acid as:-

$\begin{matrix}&CH_3COOH&\rightleftharpoons &CH_3COOH&+&H^+\\ At\ time, t = 0 &1.8&&0&&0\\At\ time, t=t_{eq}&-x&&+x&&+x\\ ----------------&-----&-&-----&-&-----\\Concentration\ at\ equilibrium:-&1.8-x&&x&&x\end{matrix}$

The expression for dissociation constant of acid is:

$K_{a}=\frac {\left [ H^{+} \right ]\left [ {CH_3COO}^- \right ]}{[CH_3COOH]}$

$1.8\times 10^{-5}=\frac{x^2}{1.8-x}$

$1.8\left(1.8-x\right)=100000x^2$

Solving for x, we get:

Percentage ionization = $\frac{0.00568}{1.8}\times 100=0.32 \%$

<u>Option B is correct.</u>

8 0

2 years ago

A student practicing for a track meet ran 300 meters in 30 seconds. what was her average speed?

ololo11 [35]

Answer:

Explanation:

Her average speed can be found by using the formula

$v = \frac{d}{t} \\$

d is the distance

t is the time taken

From the question we have

$v = \frac{300}{30} = 10 \\$

We have the final answer as

Hope this helps you

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2 years ago

How would you figure the number of protons or electrons in an atom

TiliK225 [7]

The number of protons in an atom can be determined by the element's atomic number, and the number of electrons can be determined by subtracting by atomic mass by the atomic number.

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2 years ago