When pure water and sodium chloride combine what do they create

Answer: The complete balanced chemical equation is,

Explanation:

A chemical equation represents the reactants on the left and the products on the right, separated by a right-pointing arrow indicating the reaction.

This representation includes the phases of the substances and uses subscripts and superscripts for numbers.

For the reaction given, the balanced chemical equation with phases is:

After four hours of cooling, the soup reached a temperature of 140 F (or) 42 C.

Explanation:

A food worker allowed a cup of soup to cool for two hours,

step 1: The temperature attained in two hours is 70 F (or) 21 C

step 2: Consequently, in four hours, this doubles the value

Therefore, the temperature after four hours is 2(70)= 140 F (or) 2(21)= 42 C

Answer:

To lower the temperature of the solution from 25.0°C to 5.0°C, it is necessary to use 35.2g of NH₄NO₃ for every 100.0g of water.

Explanation:

In order to cool down the solution, we need:

4.184 J/g°C × (5.0°C - 25.0°C) × (100.0g + X) = -Y

8368 J + 83.68 J/gX = Y (1)

Here, x represents the grams of NH₄NO₃ required, and Y represents the energy needed to remove heat.

Furthermore, the energy Y becomes:

Y = 25700 J/mol × X

Y = 321 J/g X (2)

Substituting (2) into (1)

8368 J + 83.68 J/g X = 321 J/g X

8363 J = 237.32 J/gX

X = 35.2g

This means 35.2g of NH₄NO₃ must be used for every 100.0g of water to achieve a temperature decrease from 25.0°C to 5.0°C.

I trust this information will be useful!