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Serggg [28]
2 years ago
10

18. Does the diagram below represent an exothermic reaction, or an endothermic reaction? Why do you think this? (2 pts) *

Chemistry
1 answer:
EastWind [94]2 years ago
7 0

Answer:

exothermic reaction

Explanation:

:)

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Identify an element when supplied with the natural abundance and mass of each isotope
lozanna [386]

The element can also be called gold-197. It has Mass number is 197, atomic number is 79 and electrons 79, Atoms that have the same number of protons but different number of neutrons. Isotopes have identical numbers of protons and electrons.

4 0
3 years ago
At a certain temperature this reaction follows first-order kinetics with a rate constant of 0.184 s^-1 ? Suppose a vessel contai
meriva

Answer:

0.57 M

Explanation:

rate = change in concentration /time

Initial concentration of Cl2O5 = 1.16 M

Let the concentration of Cl2O5 after 5.70 seconds be y

rate = (1.16 - y)/5.7

The reaction follows a first order

Therefore, rate = ky = 0.184y

0.184y = (1.16 - y)/5.7

0.184y × 5.7 = 1.16 - y

1.0488y + y = 1.16

2.0488y = 1.16

y = 1.16/2.0488 = 0.57 M

Concentration of Cl2O5 after 5.70 seconds is 0.57 M

6 0
4 years ago
Which of the following statements best describes the number of neutrons in an atom?
Alexeev081 [22]

Answer:

its the last one

Explanation:

7 0
3 years ago
The activation energy for the reaction NO2 (g )+ CO (g) ⟶ NO (g) + CO2 (g) is Ea = 218 kJ/mol and the change in enthalpy for the
madreJ [45]

Answer:

470\frac{KJ}{mol}

Explanation:

The activation energy represents the energy barrier that reagents must pass to transform into products (or products to transform into reagents in a reverse reaction)

For any reaction, the change in enthalpy is related to the activation energy by the equation

\Delta H =E_{a\ direct}-E_{a\ reverse}

So, the activation energy for the reverse reaction is

E_{a\ reverse}=E_{a\ direct}-\Delta H =218 \frac{KJ}{mol} - (-252)\frac{KJ}{mol}=470\frac{KJ}{mol}

4 0
3 years ago
How do you determine if something is extensive or intensive
Shalnov [3]

Answer:

Intensive properties do not depend on the quantity of matter. Examples include density, state of matter, and temperature. Extensive properties do depend on sample size. Examples include volume, mass, and size.

Explanation:

Brainly!!!

pls

3 0
3 years ago
Read 2 more answers
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