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shusha [124]
3 years ago
15

All living creatures are from

Chemistry
2 answers:
amid [387]3 years ago
7 0

Answer:

GodGodGodGodJustGod

Phoenix [80]3 years ago
6 0
I’m I believe GOD made us all
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Using the standard enthalpies of formation found in the textbook, determine the enthalpy change for the combustion of ethanol c2
ArbitrLikvidat [17]
Enthalpy of formation is calculated by subtracting the total enthalpy of formation of the reactants from those of the products. This is called the HESS' LAW.
ΔHrxn = ΔH(products) - ΔH(reactants)

Since the enthalpies are not listed in this item, from reliable sources, the obtained enthalpies of formation are written below.
ΔH(C2H5OH) = -276 kJ/mol
ΔH(O2) = 0 (because O2 is a pure substance)
ΔH(CO2) = -393.5 kJ/mol
ΔH(H2O) = -285.5 kJ/mol

Using the equation above,
ΔHrxn = (2)(-393.5 kJ/mol) + (3)(-285.5 kJ/mol) - (-276 kJ/mol)
ΔHrxn = -1367.5 kJ/mol

<em>Answer: -1367.5 kJ/mol</em>
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3 years ago
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Exactly 25.0 mL of an aqueous solution of barium hydroxide required 32.0 mL of 0.200 M nitric acid to neutralize it. What is the
Brrunno [24]

Answer:

2000m the example 25.0\0.200

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A 0.227 mol chunk of dry ice (solid CO2) changes to gas. What is the volume of that gas measured at 27 °C and 740 mmHg?
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Explanation:3.2 ft 2 fti2 ft 4 ft ft2

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0.00105 liters is the same as how many cm and ml
Ainat [17]
The answer is 1.05 cubic centimeters and 1.05 mL (1 cubic centimeter is equal to 1 mL)
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If the trend in a property is periodic, it means it will
kotegsom [21]

Answer:

d) repeat

Explanation:

If the trend in a property is periodic, it means it will repeat on the periodic table.

Periodic properties on the table have a constant pattern as we move up or down a group or across a period from left to right.

  • This helps to predict some of the salient properties of elements as we move through the periodic table.
  • For example, on most periodic groups, metallicity increases as we move down the group and it decreases across the period.
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