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slavikrds [6]
4 years ago
5

Which substance is a mixture? Table salt, gasoline, aluminum, or carbon dioxide.

Chemistry
2 answers:
Lady_Fox [76]4 years ago
8 0
Gasoline is the mixture because it takes several chemicals mixing together to make it.
Paul [167]4 years ago
4 0

Answer:

gasoline

Explanation:

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pentagon [3]
<span>There are five. Two atoms of aluminum, and three atoms of oxygen.There are 5</span>
6 0
3 years ago
The freezing point of ethanol, CH3CH2OH, is -117.300 °C at 1 atmosphere. Kf(ethanol) = 1.99 °C/m
MAXImum [283]

Answer : The molecular weight of this compound is 891.10 g/mol

Explanation :  Given,

Mass of compound = 12.70 g

Mass of ethanol = 216.5 g

Formula used :  

\Delta T_f=i\times K_f\times m\\\\T_f^o-T_f=i\times T_f\times\frac{\text{Mass of compound}\times 1000}{\text{Molar mass of compound}\times \text{Mass of ethanol}}

where,

\Delta T_f = change in freezing point

T_f^o = temperature of pure ethanol = -117.300^oC

T_f = temperature of solution = -117.431^oC

K_f = freezing point constant of ethanol = 1.99^oC/m

i = van't hoff factor = 1   (for non-electrolyte)

m = molality

Now put all the given values in this formula, we get

(-117.300)-(-117.431)=1\times 1.99^oC/m\times \frac{12.70g\times 1000}{\text{Molar mass of compound}\times 216.5g}

\text{Molar mass of compound}=891.10g/mol

Therefore, the molecular weight of this compound is 891.10 g/mol

7 0
3 years ago
How many grams are needed to obtain 1.5 moles of mgco3?
Oduvanchick [21]
Molar mass MgCO3 => 84.31 g/mol

1 mole MgCO3 ----------- 84.31 g
1.5 moles MgCO3-------- ??

1.5 x 84.31 / 1 => 126.465 g
8 0
3 years ago
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Explanation:

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When a runner participates in a marathon, they travel a distance of 26.2 miles. How many kilometers is
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7 0
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