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Vika [28.1K]
2 years ago
7

Diffrentiate the reactivity of metals and Non-metals with air / oxygen.​

Chemistry
1 answer:
algol132 years ago
8 0

Answer:

Both metals and non-metals when burnt in oxygen form their oxides. Oxides of metals are basic in nature and oxides of non-metals are acidic in nature.

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the plant population over time has decreased. this could make all other organisms above the plant population numbers decrease as well.

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What property is primarily responsible for determining the type of electromagnetic energy and peak wavelength emitted by a star
svetoff [14.1K]
The answer i think it is... is Temperature 
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4 years ago
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The alkline earth metals include?
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Answer:

The Popular ones are five in number

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3 years ago
What is the total amount of heat released when 94.0 g water at 80.0 °C cools to form ice at −30.0 °C?
Wewaii [24]

Answer:

The total amount of heat released  is  68.7 kJ

Explanation:

Given that:

mass of water = 94.0 g

moles of water = 94 / 18.02 = 5.216

80⁰C   ------>  0⁰C  -------->    -30⁰C

Q1 = m Cp dT

      = 94 x 4.184 x (0 - 80)

     = -31463.68 J

     = -31.43 kJ

Q2 = 6.01 x 10^3 x 5.216

    = - 31348.16 J

   = -31.35 kJ

Q3 = - 94 x 2.09 x 30

    = - 5893.8 J

   = -5.894 kJ

Total heat = Q1 + Q2 + Q3  = -31.43 kJ  + (-31.35 kJ  ) + (-5.894 kJ )  = -68.7 kJ

Total heat released = -68.7 kJ

Note that the "negative sign" simply indicates heat released, therefore no need to put it in the answer.

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3 years ago
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