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Ymorist [56]
3 years ago
12

How can there be more than 1000 different atoms when there are only about 100 different elements?

Chemistry
1 answer:
Irina-Kira [14]3 years ago
7 0
Um im pretty sure there are only about 100 different atoms...
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What is the coordination number for Potassium Nitrate?​
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The coordination number is 8

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A solar panel combines multiple photovoltaic cells. Which type of energy is used to power a solar panel? kinetic energy thermal
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Imagine a made-up pol
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Question 1 and .2

Explanation:

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an auto of an element has 17 protons in its nucleus.a) write the electronic configuration of the atom.b)to what period and group
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Answer:

i hope it will help you

Explanation:

electronic configuration 1s²,2s,²2p^6,3s²3p^6,4s^1

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The second-order rate constant for the following gas-phase reaction is 0.041 1/MLaTeX: \cdotâs. We start with 0.438 mol C2F4 in
pantera1 [17]

Answer:

134.8 seconds is the half-life (in seconds) of the reaction for the initial C_2F_4 concentration

Explanation:

Half life for second order kinetics is given by:

t_{\frac{1}{2}=\frac{1}{k\times a_0}

Integrated rate law for second order kinetics is given by:

\frac{1}{a}=kt+\frac{1}{a_0}

t_{\frac{1}{2} = half life

k = rate constant

a_0 = initial concentration

a = Final concentration of reactant after time t

We have :

C_2F_4 \longrightarrow \frac{1}{2} C_4F_8

Initial concentration of C_2F_4=[a_o]=\frac{0.438 mol}{2.42 L}=0.1810 mol/L

Rate constant = k = 0.041 M^{-1} s^{-1}

t_{\frac{1}{2}=\frac{1}{k\times a_0}

=\frac{1}{0.041 M^{-1} s^{-1}\times 0.1810 mol/L}

t_{1/2}=134.8 s

134.8 seconds is the half-life (in seconds) of the reaction for the initial C_2F_4 concentration

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