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scoray [572]
3 years ago
9

7. A hypothesis needs to be written in a specific format.

Chemistry
1 answer:
Nastasia [14]3 years ago
4 0

Answer:

a . knowledge and existing theories .

b. falsifiable scope

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Given: N2 + 3Cl2 → 2NCl3, ΔH = 464 kJ/mol Use the given bond energies and the periodic table to calculate the energy change in t
guapka [62]

The given chemical reaction is:

N_{2}+3Cl_{2}-->2NCl_{3}

ΔH^{0}_{reaction}=∑BE(reactants)-∑BE(products)

                 = {(941 kJ/mol) + (3 * 242 kJ/mol)} -[{2*(3*200 kJ/mol)}]

                     = 467 kJ/mol

Calculating the change in heat when 85.3 g chlorine reacts in the above reaction:

Moles of chlorine = 85.3 g Cl_{2}* \frac{1 mol Cl_{2}} {70.91 g Cl_{2}  }

                             = 1.20 mol Cl_{2}

Heat change when 1.20 mol chlorine reacts

                             = 1.20 mol * \frac{467kJ}{mol} =560.4 kJ

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padilas [110]
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8 0
3 years ago
Calcium carbonate can be broken
arlik [135]

Answer:

Thermal decomposition

Explanation:

Calcium carbonate can be broken  down by heating. The following equation represents this chemical change.

CaCO₃(s) ⇒ CaO(s) + CO₂(g)

The scientific term for this process is thermal decomposition.

  • Thermal refers to the fact that heat is required.
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3 years ago
Why Rutherford model sometimes called the nuclear model
lawyer [7]
The Rutherford model was called the nuclear model because he decided on the atom to consist of both the nucleus, and the orbits of electrons, so he separated the nucleus from being combined with the whole atom
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soda is fuzzy and can help heal the swell caused by a bee sting

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