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Vlad1618 [11]
3 years ago
13

Why does the designed world change?

Chemistry
1 answer:
Archy [21]3 years ago
3 0
The designed world is changed regularly by inovations and new technology.
Hope I could help.
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The temperature of a sample of a substance changes from 10.°C to 20.°C. How many Kelvin does the temperature change?
Vanyuwa [196]

Answer:

10 kelvin

Explanation:

10 c. =283.15 k.

20 c. = 293.15 k.

293.15 - 283.15 = 10

7 0
3 years ago
How many moles are in 85.0 grams of water
alexgriva [62]
To convert from grams to moles, you must divide the given mass by the molecular weight. If this is so, then:

Water ≈ 18.02 grams/mol.

85.0 g/ 18.02 g/mol ≈ 4.72 moles
3 0
3 years ago
What is the overall cell potential for this redox reaction?
Zina [86]
Oxid  # :     0          0                   +2        -1

equation:Cl_{2}  +  Ni -----\ \textgreater \   Ni^{2+}  +  2Cl ^{-}

∴ the nickel was oxidized while chlorine was reduced

nickel reduction potential =  - 0.25 V
              but since it is being oxidised the you have to switch the integer sign so the 
              the potential of nickel in this case becomes + 0.25 V

chlorine was reduced thus its reduction potential remains same  = + 1.36 V

Overall Cell potential  =  ∑ of half cell potential

The overall cell potential  =  (+ 1.36) + (+ 0.25)
                                         =   + 1.61 V

∴ the answer would be D

4 0
3 years ago
Passing an electric current through a sample of water (H2O) can cause the water to decompose into hydrogen gas (H2) and oxygen g
Andreas93 [3]
2H2O --> 2H2 + O2
The mole H2O:mole O2 ratio is 2:1
Now determine how many moles of O2 are in 50g: 50g × 1mol/32g = 1.56 moles O2
Since 1 mole of O2 was produced for every 2 moles of H2O, we need 2×O2moles = H2O moles
2×1.56 = 3.13 moles H2O
Finally, convert moles to grams for H2O:
3.13moles × 18g/mol = 56.28 g H2O
D) 56.28
7 0
4 years ago
DETERMINE THE MOL OF WATER NEEDED TO REACT WITH1.5 MOL OF NITROGEN DIOXIDE. 3NO2+ H20→ 2HNO3 + NO
dexar [7]

Answer: 0.5 mol h2o

Explanation: Hope this help :D

8 0
3 years ago
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