The positive effect of using chemistry is the generation of energy without fossil fuels.
Chemistry is the branch of science that deals with the study of the nature, properties and composition of matter as well as the changes that matter undergoes. Chemistry has really contributed positively to the advancement of the society.
Lately, there has been a lot of emphasis on alternative sources of energy apart from fossil fuels. One such options is the use of hydrogen fuels. Chemistry has been at the forefront of this research.
Hence, one positive effect of using chemistry is that energy can be generated without burning fossil fuels.
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Answer:
In first shell duplet rule is applied because first shell contains maximum 2 electrons
Explanation:
It would keep traveling westward
Answer:
19.3 moles
Explanation:
In order to calculate the number of moles of Chlorine gas from the volume, we have to calculate its mass from its known density using the formula:
Density (g/L) = mass (g) /volume (L)
Density of Chlorine gas= 3.2g/L
Volume = 428L
3.2 = mass/428
mass = 428 × 3.2
mass = 1369.6g
Using mole = mass ÷ molar mass
Molar mass of chlorine (Cl2) = 35.5 × 2
= 71g/mol
mole = 1369.6 ÷ 71
mole = 19.2901
mole = 19.3 moles
Answer:
Explanation:
half life = 1600 years .
m = M x 
m is mass of the radioactive object after n half lives , M is original mass.
n = 4800 / 1600
= 4
Putting the valus of n and M we have
m = .25 x 
= .03125 g .
