3 years ago

What is the net ionic equation for KCl+NaI= KI+NaCl

1 answer:

8 0

K^+ + I^- -> KI (s)
Because kcl, NaCl & naI are aq so they're split apart & KI is a solid so it stays together, then you just cross out the similar ions.

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How many valence electrons does Arsenic have?

adoni [48]

Arsenic's atomic number is 33.

Hence his electronic configuration is $1s^22s^22p^63s^23p$ hence his valence electrons are $4s^24p^3$ .

5 valence electrons

4 0

3 years ago

Half-life is always given in units of time

ad-work [718]

Yes, half life is always given in units of time, hope this helps

5 0

4 years ago

Iton is a transition element a) Give two physical properties of iron tgat are similar to sodium. b) Give three physical properti

Pepsi [2]

Answer:

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Explanation:

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3 years ago

Given the formulas for the ionic compounds, draw the correct ratio of cations to anions (a) BaSO4, (b) CaF2, (c) Mg3N2, (d) K2O.

Karolina [17]

Answer:

A. It formed by barium(Ba+2) ion and sulfate ( SO42- )

B. It is formed by calcium ion (Ca+2) and two fluoride ions (2F-)

C. It is formed by magnesium ion (Mg+2) and nitride ion (N3-)

D. It is formed by two potassium ions (2 K+) and oxide ion(O2-)

3 0

3 years ago

A sample of water at 100°C is converted to steam after absorbing 820 kJ of heat. How grams of H2O are contained in the sample? A

Varvara68 [4.7K]

Since water is already at 100<span>°C all the energy is used to evaporate it.
Now we can calculate how many </span>mols of water are evaporated with 820kJ.
$N= \frac{820}{41} =20 mol$
We calculated that we got 20 mols of water evaporated. Now, all we have to do is find how many grams is a mol of water. Molar mass of water is <span>20.16 g/mol.
</span>The final answer is:
$m=20*20.16=403.2g$

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3 years ago