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3 years ago

Someone, anyone please help me please. and thank you!

Chemistry

2 answers:

Nezavi [6.7K]3 years ago

8 0

Answer:

i'm pretty sure water then oxygen but those are the only ones i know _._ sorry.

Explanation:

Tom [10]3 years ago

4 0

Answer:

sorry but maria carrey ?

Explanation:

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ASAP

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4 years ago

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Hydrogen gas and oxygen gas combine according to this reaction: 2H2(g]+O2(g]→2H2O(l]At STP, a chemist mixes 3.74 L of hydrogen g

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Answer:

1.47 Liters of O₂ were reacted

Explanation:

The reaction is:

2H₂ (g) + O₂(g) → 2H₂O(l)

As we have the volume of hydrogen we need to work with denstiy to determine the moles that have reacted.

Density = mass / volume

Density . volume = mass → 0.071 g/L . 3.74L = 0.265 g

We determine the moles of H₂ → 0.265 g. 1mol/2g = 0.132 moles

In the reaction, ratio is 2:1. We make a rule of three:

2 moles of H₂ need 1 mol of O₂ to react

Then, 0.132 moles would need (0.132 .1)/2 = 0.066 moles of O₂

In order to determine the volume we need the oxygen's density but, we have to convert the mass to moles, firstly.

0.066 moles . 32 g/ 1mol = 2.12 g

Then oxygen's density = oxygen's mass / oxygen's volume

Oxygen's volume = oxygen's mass / oxygen's density

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3 years ago

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How many grams of NaCl (molecular weight = 58 Da) would you have to dissolve in 50ml to make a 2M stock solution? Answer:

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This amount is converted to grams using the molar mass (58 g/mol).

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3 years ago

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f. 4-ethylpentane: This is actually 3-methylhexane

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3 years ago

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