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Lunna [17]
3 years ago
8

Main ingredients of plastic bags and natural resources used please

Chemistry
1 answer:
DanielleElmas [232]3 years ago
4 0
<span>polyethylene or polythene are the main ingredients </span>
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How many atoms are in 187 g of Calcium?
N76 [4]
Atomic mass Calcium ( Ca) = 40.078 u.m.a

40.078 g --------------- 6.02x10²³ atoms
187 g ------------------- ??

187 x ( 6.02x10²³) / 40.078 =

1.125x10²⁶ / 40.078 = 2.808x10²⁴ atoms

hope this helps!




4 0
3 years ago
WILL MARK BRAINLY
DENIUS [597]

Answer:

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Explanation:

7 0
2 years ago
Consider the phase change lab what is required to bring about a phase change
alina1380 [7]

Heating or cooling :)

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3 years ago
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2.00−g sample of a metal X (that is known to form X2+ ions) was added to 0.100 L of 0.500 M H2SO4. After all the metal had react
xz_007 [3.2K]

Answer:

the molar mass is 40 and the metal is Calcium

Explanation:

X + H2SO4=X2SO4 + H2

The mole ratio is 1:1

no of mole of H2SO4= conc(M) × Vol(L)

=0.1×0.5

=0.05 mol

from the balanced chemical equation of the reaction

no of mole of 'X' = no of mole of H2SO4

thus no of mole of X=0.05 mol

Also, no of mole=mass/molar mass

molar mass of 'X'=mol/mass

=2/0.05

=40

3 0
3 years ago
Which of the following is true about the relationship between the energy gap (DE) between the spin states for a 1H nucleus and t
Alecsey [184]

Answer:

B

Explanation:

They are directly proportional. That's what the relationship states

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3 years ago
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