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I am Lyosha [343]
3 years ago
11

Show how to convert the temperature 84.7° C to Kelvin. Please include all steps and label the final answer.

Chemistry
2 answers:
jarptica [38.1K]3 years ago
8 0

Answer:

The answer is 357.85 K.

Explanation:

In order to convert temperatures from degrees Celsius to degrees Kelvin, use the following formula:

temperature in degrees Kelvin = temperature in degrees Celsius + 273.15.

(Oftentimes, 273 is used instead of 273.15; it depends on the discretion of the teacher or student.)

The temperature given in degrees Celsius = 84.7° C

Therefore, the temperature in degrees Kelvin (K) = 84.7 + 273.15 = 357.85 K.

Likurg_2 [28]3 years ago
6 0
To convert from C to K you just at 273.15 to the C value.

84.7C
+ 273.15 (C—>K)
= 357.85K

Since the first value has only 1 sig fig left of the decimal, the answer must also be the same. And we round down to get to the nearest even digit

Final answer = 357.8K
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Answer: Velocity

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3 years ago
if a sample of gas at 25.2 c has a volume of 536mL at 637 torr, what will its volume be if the pressure is increased to 712 torr
nignag [31]
Considering ideal gas:
PV= RTn

T= 25.2°C = 298.2 K

P1= 637 torr = 0.8382 atm

V1= 536 mL = 0.536 L

:. R=0.082 atm.L/K.mol

:. n= (P1V1)/(RT) = ((0.8382 atm) x (0.536 L))/
((0.082 atmL/Kmol) x (298.2K))

:. n= O.0184 mol

Then,
P2= 712 torr = 0.936842 atm

V2 = RTn/P2 = [(0.082atmL/
Kmol) x (298.2K) x (0.0184mol) ]/(0.936842atm)

:.V2 = 0.4796 L
OR
V2 = 479.6 ml

6 0
3 years ago
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True [87]

Answer:

0.479 M or mol/L

Explanation:

So Molarity is moles/litres of solution...often written as M=mol/L

So here we are given grams of BaCl2 which we have to convert to moles. To convert to moles of BaCl2 we have to divide 63.2 g BaCl2 by molar mass of BaCl2 which is 208.23 g/mol so you get 63.2/208.23 = 0.3035 moles of BaCl2

Second step is converting the 634mL to litres by simply dividing by 1000 because we know 1 litre has 1000ml so 634/1000 = 0.634L

Now we just plug these guys in our molarity formula M=mol/L

M= 0.3035/0.634 = 0.479 M or mol/L

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3 years ago
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The decomposition of dinitrogen pentaoxide has an activation energy of 102 kj/mol and \delta ? h°rxn = + 55 kj/mol. what is the
posledela
A positive cahnge of enthalpy, ΔH rxn = + 55 kJ/mol, for the forward reaction means that the reaction is endothermic, i.e. the reactants absorb energy and the products are higher in energy.

Activation energy is the difference in the energy level of the reactants and the peak in the potential energy diagram (the energy of the transition state).

For an endothermic reaction, the products will be closer in energy to the transition state than what the reactans will be; so, the activation energy of the reversed reaction is lower than the activation energy of the forward reaction.

Activation energy of reverse and forward reactions is related by:

Activation energy of reverse rxn = Activation energy of forward rxn - ΔH rxn

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Answer: 47 kJ/mol
8 0
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