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rusak2 [61]
3 years ago
13

Please help!!

Chemistry
2 answers:
ludmilkaskok [199]3 years ago
8 0

Answer:

yes, the law of conservation of mass hold true in this case burning magnesium strip is explained by this equation 2 Mg (s) + O2 (g) -> MgO (s)So the lighter magnesium, after reacting with oxygen in air, forms the heavier magnesium oxide. molar mass of magnesium and magnesium oxide are 24g and 40g respectively. So the same ratio 24:40 (i.e. 3:5) is maintained in the given masses of 48g and 80g, which means mass is conserved in the reacion.

Explanation:

Brainiest Please!!!

Mnenie [13.5K]3 years ago
8 0

Answer:

Yes, because when burning the magnesium strip the surrounding air also interacted and combined with it. In the experiment the final product weighs 80 grams, so you would subtract 80 – 48 leaving you with 32 grams. So the total mass of air that was added was 32 grams.

Ps. don't copy just reword

Explanation:

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What is the empirical formula of a molecule containing 65.5% carbon, 5.5% hydrogen, and 29.0% oxygen
natta225 [31]
Carbon(C):
number of moles= mass/molar mass(Mr)
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Hydrogen(H):
number of moles=mass/molar mass (Mr)
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Oxygen (O):
number of moles = mass/molar mass (Mr)
=29.0/16
=1.8 moles

EF= lowest number of moles over each of the elements

So,
C= 5.5/1.8 = 3
H= 5.5/1.8 = 3
O= 1.8/1.8 = 1

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