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gladu [14]
3 years ago
6

The compound potassium nitrate is a strong electrolyte. Write the transformation that occurs when solid potassium nitrate dissol

ves in water Use the pull-down boxes to specify states such as (aq) or (s).
Chemistry
1 answer:
trapecia [35]3 years ago
7 0

Answer:

The transformation that occurs when solid potassium nitrate dissolves in water:

KNO_3(s)\rightarrow K^+(aq)+NO_3^{-} (aq)

Explanation:

Electrolyte are those chemical compounds which oj dissolving water dissociates into ions and make the solution electrically conductive in nature.They are of two types:

  • Strong electrolytes: Those compounds which get complete dissociated into ions.
  • Weak electrolytes: Those compounds which get partially  dissociated into ions.

When solid potassium potassium nitrate is dissolved in water it get dissociated into potassium ions and nitrate ions in an aqueous solution :

KNO_3(s)\rightarrow K^+(aq)+NO_3^{-} (aq)

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A I think

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How many moles of FeCI3 are present in 345.0 g FeCI3
Sphinxa [80]

Answer:

\boxed {\boxed {\sf About \ 2.127 \ moles \ of \ FeCl_3}}

Explanation:

To convert from moles to grams, the molar mass must be used.

1. Find Molar Mass

The compound is iron (III) chloride: FeCl₃

First, find the molar masses of the individual elements in the compound: iron (Fe) and chlorine (Cl).

  • Fe:  55.84 g/mol
  • Cl:  35.45 g/mol

There are 3 atoms of chlorine, denoted by the subscript after Cl. Multiply the molar mass of chlorine by 3 and add iron's molar mass.

  • FeCl₃: 3(35.45 g/mol)+(55.84 g/mol)=162.19 g/mol

This number tells us the grams of FeCl₃ in 1 mole.

2. Calculate Moles

Use the number as a ratio.

\frac{162.19 \ g \ FeCl_3}{1 \ mol \ FeCl_3}

Multiply by the given number of grams, 345.0.

345.0 \ g \ FeCl_3 *\frac{162.19 \ g \ FeCl_3}{1 \ mol \ FeCl_3}

Flip the fraction so the grams of FeCl₃ will cancel.

345.0 \ g \ FeCl_3 *\frac{1 \ mol \ FeCl_3}{162.19 \ g \ FeCl_3}

345.0 *\frac{1 \ mol \ FeCl_3}{162.19 }

\frac{345.0 \ mol \ FeCl_3}{162.19 }

Divide.

2.12713484 \ mol \ FeCl_3

3. Round

The original measurement of grams, 345.0, has 4 significant figures. We must round our answer to 4 sig figs.

For the answer we calculated, that is the thousandth place.

The 1 in the ten thousandth place tells us to leave the 7 in the thousandth place.

\approx 2.127 \ mol \ FeCl_3

There are about <u>2.127 mole</u>s of iron (III) chloride in 345.0 grams.

6 0
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B is wrong. The body uses glucose, not water, as an energy source.

C is wrong. The high specific heat capacity of water is not connected with the body's ability to store it.

D is wrong. The high specific heat capacity of water doesn't heat the body, but it slows the rate at which it cools.

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Explanation:

This is from Google.

Hope this helps :))

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