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AleksandrR [38]
3 years ago
14

Coal, oil, and natural gas are called _______.

Chemistry
2 answers:
zaharov [31]3 years ago
8 0

Answer:

I think it's A. I'm pretty sure.

Explanation:

Lady_Fox [76]3 years ago
5 0

Answer:

Coal, oil and natural gas are called _________A. fossil fuels

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Calculate the mass of water produced when 1.92 g of butane reacts with excess oxygen.
never [62]
C4h10+6.5o2=4co2+5h2o
moles of butane=1.92/58=0.0331 moles
moles of water=0.1655 moles\
as the butane and water has 1 is to 5 molar ratio
0.1655=mass/18
mass=2.98 g
mass of water produced = 2.98 g
4 0
3 years ago
How do you Calculate the molarity of 250 ml of solution in which 2.7 g of MgCl2 are dissolved
IRINA_888 [86]

Answer:

Molar mass of MgCl2 is 95 g/mol

Mg = 24 g/mol and Cl = 35.5 ×2 = 71 g/mol

moles = mass given/ molar mass

= 2.7/95 = 0.028 mol

volume = 250/1000 = 0.25 dm3 (ml is the same as dm3)

molarity of MgCl2 = moles/volume

= 0.028/0.25

= 0.112 mol/dm3

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2 years ago
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Explanation:

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This sublevel has an azimuthal quantum number of 0 and it is spherical in shape;

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The correct answer is D. chemical reaction.

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