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____ [38]
3 years ago
9

H E L P M E H P L E A S E

Chemistry
1 answer:
OverLord2011 [107]3 years ago
3 0

Answer:

Its olive oil

Explanation:

0.92 g/mL x 20=18.4

Water and glycerin are too heavy, and math rules out ethanol

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What is the melting point and boiling point of Gold in Celsius and what is the # of protons and Neutrons of it oh and the number
nikitadnepr [17]
The  of melting point of gold is 1,948 degrees F and 1,064 degrees C 
<span>The boiling point is 4,892 degrees F and 2,700 degrees C

Yet the numbers neutrons are 12. The number of protons is 36 and electrons is the same as protons 

hope this helped :)

</span>
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3 years ago
Standard Thermodynamic Quantities for Selected Substances at 25 ∘C Reactant or product ΔHf∘(kJ/mol) Al(s) 0.0 MnO2(s) −520.0 Al2
Svet_ta [14]

Answer:

-1815.4 kJ/mol

Explanation:

Starting with standard enthalpies of formation you can calculate the standard enthalpy for the reaction doing this simple calculation:

∑ n *ΔH formation (products) - ∑ n *ΔH formation (reagents)

This is possible because enthalpy is state function meaning it only deppends on the initial and final state of the system (That's why is also possible to "mix" reactions with Hess Law to determine the enthalpy of a new reaction). Also the enthalpy of formation is the heat required to form the compound from pure elements, then products are just atoms of reagents organized in a different form.

In this case:

ΔH rxn = [(2 * -1675.7) - (3 * -520.0)] kJ/mol = -1815.4 kJ/mol

4 0
3 years ago
A student hypothesized that the green color of plant leaves is related to exposure to sunlight and tested this hypothesis by pla
kkurt [141]
The hypothesis is that
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8 0
4 years ago
Read 2 more answers
. When 0.022189 is correctly rounded to two significant figures the number becomes
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0.022
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Why is alchemy not considered a science
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That is because Alchemy is not based on real research and facts, but rather on magic and occultism. Sure, many things in it have been used as basics for some chemistry, but most is false and incorrect.
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