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harkovskaia [24]
3 years ago
14

If a block weighs 125 grams and it has a volume of 5 mL, what is it's density?

Chemistry
1 answer:
Licemer1 [7]3 years ago
4 0
The answer is 5 if u multiple
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How many liters of a 0.30M solution are needed to give 2.7 moles of solute? Your answer:
OverLord2011 [107]
You HAVE TO know that molarity (M) tells you the number of moles of a solute per Liters of solution.
M=mol/L
0.3M = 2.7 mol/ Volume
Volume = 2.7 mol/3.0 L
Volume = 0.9 L
8 0
3 years ago
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True or False. Isotopes have different chemical properties. Explain why?
Maurinko [17]

Answer:

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2 years ago
Pure substance can be __ and __
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2 years ago
Calculate the mass of Octane needed to release 6.20 mol Co2
n200080 [17]
The combustion reaction of octane is as follow,

                           C₈H₁₈  +  25/2 O₂     →     8 CO₂  +  9 H₂O

According to balance equation,

8 moles of CO₂ are released when  =  114.23 g (1 mole) Octane is reacted

So,

      6.20 moles of CO₂ will release when  =  X g of Octane is reacted

Solving for X,
                                     X  =  (114.23 g × 6.20 mol) ÷ 8 mol

                                     X  =  88.52 g of Octane
Result:
           88.52 g of Octane is needed to release 6.20 mol CO₂.
8 0
2 years ago
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