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velikii [3]
3 years ago
11

Carbon dioxide is formed when two oxygen atoms chemically combine with a carbon atom. Which term best describes carbon dioxide?

Chemistry
1 answer:
crimeas [40]3 years ago
6 0
<span>Carbon dioxide is a pure compound, consisting of two kinds of atoms that are bonded together.</span>
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A reaction has a rate constant of 2.08 × 10−4 s−1 at 26 oC and 0.394 s−1 at 79 oC . Determine the activation barrier for the rea
leva [86]

<u>Answer:</u> The activation energy of the reaction is 124.6 kJ/mol

<u>Explanation:</u>

To calculate activation energy of the reaction, we use Arrhenius equation, which is:

\ln(\frac{K_{79^oC}}{K_{26^oC}})=\frac{E_a}{R}[\frac{1}{T_1}-\frac{1}{T_2}]

where,

K_{79^oC} = equilibrium constant at 79°C = 0.394s^{-1}

K_{26^oC} = equilibrium constant at 26°C = 2.08\times 10^{-4}s^{-1}

E_a = Activation energy of the reaction = ?

R = Gas constant = 8.314 J/mol K

T_1 = initial temperature = 26^oC=[26+273]K=299K

T_2 = final temperature = 79^oC=[79+273]K=352K

Putting values in above equation, we get:

\ln(\frac{0.394}{2.08\times 10^{-4}})=\frac{E_a}{8.314J/mol.K}[\frac{1}{299}-\frac{1}{352}]\\\\E_a=124595J/mol=124.6kJ/mol

Hence, the activation energy of the reaction is 124.6 kJ/mol

3 0
3 years ago
2. Zn + HCI. ZnCl2 + H2<br><br>what reaction is this ​
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Answer: Type of Chemical Reaction: For this reaction we have a combination reaction. Balancing Strategies: When we add zinc to hydrochloric acid we end up with zinc chloride, a salt, and hydrogen gas. This reaction is actually a good way to make hydrogen gas in the lab.

5 0
3 years ago
4.391 x 10 -3 into standard notation
padilas [110]

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0.004395

Explanation:

do u mean in scientific if u do this is the answer

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Balance the following equation by providing the correct coefficients C2H6 + O2 -&gt; CO2 + H2O
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2 C2H6 + 7 O2 ➡️ 4 CO2 + 6 H2O
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Which of the following procedures increases the average kinetic energy
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Answer:

Cooling Steam at 100 C to ice at 0 C

Explanation:

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