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Blizzard [7]
3 years ago
7

What elegant has 2 valence electrons

Chemistry
1 answer:
scZoUnD [109]3 years ago
8 0

Explanation:

 Calcium is the element that has 2 valence electrons.

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True or false? You can follow the progress of a reaction that produces a gas using a sensitive mass
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true

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Write balanced, net ionic equations for the following precipitation, acidn base, or gasn forming reactions. Include states of ma
dybincka [34]

Answer:

Explanation:

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b  )

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c )

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H ⁺ + ClO₄⁻ +  K⁺ + OH⁻  =  k⁺  ClO₄⁻  + H₂O

d )

NH₄OH + HNO₃ = NH₄NO₃  + H₂O

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e )

HNO₂ + KOH = KNO₂ + H₂O

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H⁺ + IO₃⁻ + CaCO₃ ( s ) = Ca( IO₃ )₂ + H₂CO₃

g )

c ) is strong acid and strong base

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5 0
3 years ago
The bond between iodine and fluorine in l-F would be a:
koban [17]

Answer:

D.) polar covalent bond

4 0
3 years ago
A student uses a calorimeter to determine the enthalpy of dissolving for ammonium nitrate. The student fills a calorimeter with
ale4655 [162]
Enthalpy change during the dissolution process = m c ΔT,

here, m = total mass = 475 + 125 = 600 g
c = <span>specific heat of water = 4.18 J/g °C
</span>ΔT = 7.8 - 24 = -16.2 oc (negative sign indicates that temp. has decreases)
<span>
Therefore, </span>Enthalpy change during the dissolution = 600 x 4.18 X (-16.2)
                                                                                 = -40630 kJ
(Negative sign indicates that process is endothermic in nature i.e. heat is taken by the system)

Thus, <span>enthalpy of dissolving of the ammonium nitrate is -40630 J/g</span>

7 0
3 years ago
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