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Gelneren [198K]
3 years ago
10

Sam toured India with his class. He saw many buildings that reminded him of buildings he saw in Saudi Arabia and in London.

Chemistry
2 answers:
aliya0001 [1]3 years ago
5 0
The correct answer is A) <span> cultural diffusion. </span>
melomori [17]3 years ago
4 0
A) cultural diffusion
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Which of the following would dissolve in water?<br> CCl4<br> LiCl<br> CH4<br> PCl6
babymother [125]
Like dissolves like
so water is polar

CCl4 is nonpolar
LiCl is polar
CH4 is nonpolar
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so LiCl would dissolve
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Identify the following as an element or compound <br><br> copper II oxide
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Copper II oxide is a compound.
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Bas_tet [7]

Answer:

ELEMENTS

COMPOUNDS

Elements are made up of one kind of atoms.

Compounds are made up of two or more kinds of atoms.

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The combustion of propane may be described by the chemical equation C 3 H 8 ( g ) + 5 O 2 ( g ) ⟶ 3 CO 2 ( g ) + 4 H 2 O ( g ) C
Kipish [7]

Answer: 72 grams of O_2(g) are needed to completely burn 19.7 g C_3H_8(g)

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number 6.023\times 10^{23} of particles.

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Putting in the values we get:

\text{Number of moles}=\frac{19.7g}{44g/mol}=0.45moles

C_3H_8(g)+5O_2(g)\rightarrow 3CO_2(g)+4H_2O(g)

According to stoichiometry:

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0.45 moles of C_3H_8 require= \frac{5}{1}\times 0.45=2.25 moles of oxygen

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72 grams of O_2(g) are needed to completely burn 19.7 g C_3H_8(g)

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3 years ago
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lyudmila [28]
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