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d1i1m1o1n [39]
4 years ago
7

Precipitation reactions occur (1 Point) when group 1 cations are mixed with group 17 anions. when insoluble reactants are mixed.

when ionic compounds react to form non-ionic products. predominantly with halide salts. when soluble ionic reactants combine to form insoluble products.
Chemistry
1 answer:
OleMash [197]4 years ago
6 0

Answer:

when soluble ionic reactants combine to form insoluble products.

Explanation:

Precipitation reactions are those reactions in which two soluble substances which are ionic in nature combine together forming insoluble salt. This insoluble salts is called precipitate and the reaction is called precipitation reaction. Precipitate is solid substance which is deposited at the bottom of the solution as insoluble material. This precipitate mostly formed in double replacement reaction.

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4 years ago
A sample of gas has a mass of 38.8 mg. Its volume is 224 mL at a temperature of 55 °C and a pressure of 886 torr. Find the molar
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Answer:

4g/mol

Explanation:

Firstly, we can get the number of moles of the gas present using the ideal gas equation.

PV = nRT

Here:

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V = 224ml = 224/1000 = 0.224L

T = 55 degrees celcius= 55+ 273.15 = 328.15K

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Now to get the molar mass, this is mathematically equal to the mass divided by the number of moles. We have the mass and the number of moles, remaining only the molar mass.

First, we convert the mass to g and that is 38.8/1000 = 0.0388

The molar mass is thus 0.0388/0.009698469964 = 4g/mol

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