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mote1985 [20]
3 years ago
5

Which method of moving materials in and out of the cell requires energy.

Chemistry
2 answers:
Vikki [24]3 years ago
8 0
<span>active transport i think
</span><span> 

</span>
kkurt [141]3 years ago
6 0
The answer is active transport
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How many grams of the excess reactant are left over according to the reaction below given that you start with 10.0 g of Al and 1
valentinak56 [21]
<span>4 Al + 3 O2 → 2 Al2O3 

(10.0 g Al) / (26.98154 g Al/mol) = 0.37062 mol Al 
(19.0 g O2) / (31.99886 g O2/mol) = 0.59377 mol O2 

0.37062 mole of Al would react completely with 0.37062 x (3/4) = 0.277965 mole of O2, but there is more O2 present than that, so O2 is in excess. 

((0.59377 mol O2 initially) - (0.277965 mol O2 reacted)) x (31.99886 g O2/mol) = 
10.1 g O2 left over</span><span>
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3 years ago
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Montano1993 [528]

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alexgriva [62]

Explanation:

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Classify the type of this chemical reaction: <br> C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(g)
sweet-ann [11.9K]
The given reaction is a combustion reaction, since a hydrocarbon is burning in presence of oxygen
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Answer:

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3 years ago
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