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AnnyKZ [126]
3 years ago
9

The two south pole ends of two magnets are touching. Which of the following can be concluded?

Chemistry
1 answer:
larisa86 [58]3 years ago
3 0

C.Work was required by an outside force.

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If 20 grams of N2 react completely with H2 , how many moles of NH3 are produced? Show Work
Maslowich
This is the balanced eq
N2 + 3H2 -> 2NH3
first you need to find mole of N2 by using
mol = mass ÷ molar mass.
mol N2= 20g ÷ (14.01×2)g/mol
=0.7138mol
then look at the coefficient between H2 and NH3.
it is N2:NH3
1:2
0.7138:0.7138×2
0.7138:1.4276 moles
moles of NH3 = 1.4276 moles
5 0
3 years ago
Is 2Zn + 2HCI = ZnCL2 + H2 balanced or unbalanced
riadik2000 [5.3K]
Unbalanced it should be 2Zn+2Hcl=2ZnCl2+H2
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How many moles of aluminum are needed to make 9 moles of molecular hydrogen? given the reaction: 2 al + 6 hcl → 2 alcl3 + 3h2 6
sergiy2304 [10]
1) Chemical equation

2Al + 6 HCl ---> 2Al Cl3 + 3 H2

2) molar ratios

2 mol Al : 3 moles H2

3) Proportion

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4) Solve for x

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Answer: 6 moles
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The scientific theory is called
Aliun [14]

Answer:

is a well-sustantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment.such fact- supported theories are not "guesses" but reliable accounts of the real worlds.

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