3 years ago

Which chemical symbols will complete the equation for this decomposition reaction?

Chemistry

2 answers:

kondaur [170]3 years ago

6 0

Answer:

Decomposition of KI:

2KI → 2K + 2I

Troyanec [42]3 years ago

3 0

2kl_> 2k +2L for a decomposition reaction

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KengaRu [80]

Answer:

The answers are either 1 or 4

Explanation:

I am pretty dure it is 1

3 0

3 years ago

What is the pH of a 0.08 M solution of Ca(OH),?

torisob [31]

Answer:

pH = 12.20

Explanation:

Ca(OH)2 is a strong base, so it dissociates completely. A 0.08 M solution of Ca(OH)2 is 0.16 M OH-, since every mole of Ca(OH)2 has 2 OH-.

Calculate pOH using [OH-] = 0.16 M

pOH = -log(0.16) = 0.80

pH = 14 - pOH = 14 - 0.80 = 12.20

4 0

3 years ago

An atom has two valence electrons, but four shells. This element is a member of which group or family?

Vesna [10]

The correct answer is C: the alkaline earth metals!

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3 years ago

Which of the following equations can be used to determine the change in enthalpy of a system? A. `DeltaH_"reaction"=DeltaH_"prod

Nostrana [21]

<u>Answer:</u> The correct answer is Option D.

<u>Explanation:</u>

Enthalpy change is defined as the difference in enthalpies of all the product and the reactants each multiplied with their respective number of moles. It is represented as $\Delta H^o$

The equation used to calculate enthalpy change is of a reaction is:

$\Delta H^o_{rxn}=\sum [n\times \Delta H^o_f_{(product)}]-\sum [n\times \Delta H^o_f_{(reactant)}]$

Hence, the correct answer is Option D.

6 0

3 years ago

Geologic evidence shows that Earth's tectonic plates can move thousands of kilometers across the Earth's surface. These movement

Sergio [31]

The answer is B.
occur gradually over millions of years.

7 0

3 years ago