Answer:2NaF is the correct one. It’s a simple combination and can be be split with relative ease

Explanation:

**Answer:**

**Explanation:**

We are asked to find how much heat a sample of copper absorbs when the temperature is increased.

Since we know the mass, temperature increase, and specific heat capacity, we can use the following formula to calculate heat.

The mass of the copper sample is 100 grams, the temperature is changed or increased by 30.0 degrees Celsius, and the specific heat of copper is 0.39 Joules per gram degrees Celsius.

- m= 100 g
- c= 0.39 J/g °C
- ΔT= 30.0 °C

Substitute the values into the formula.

Multiply the first two values. Note that the units of grams cancel.

Multiply again, this time the units of degrees Celsius cancel.

The copper sample absorbs <u>**1170 Joules**</u> of heat and <u>**Choice B **</u>is correct.

**Explanation:**

The mass of an object is a measure of the object's inertial property, or the amount of matter it contains. The weight of an object is a measure of the force exerted on the object by gravity, or the force needed to support it. The pull of gravity on the earth gives an object a downward acceleration of about 9.8 m/s2.

The **solubility **KI is 50 g in 100 g of H₂O at 20 °C. if 110 grams of ki are added to 200 grams of H₂O <u>the </u><u>**solution **</u><u>will be </u><u>**saturated**</u><u>.</u>

<h3>What is solubility?</h3>

**Solubility **is a condition where the solute is fully dissolved in the solvent. When fully mixed with the **solvent**.

Given that 50 g of KI is added to 100 g of water at 20 °C it means 100 g of water can dissolve a maximum of **50 g **of **KCl.**

1 g of water will dissolve an quantity of 0.5 g of KCl.

To assay for 200 g of water: 200 g of water can disintegrate a maximum of (0.5) x 200 g of KCl.

The maximum amount of **KCl **that will dissolve is **100 g**

Actualised amount dissolved = 110 g

when Amount dissolved > Maximum solubility limit

110 g > 100 g

Thus, the solution is **saturated.**

To learn more about **solubility, **refer to the below link:

brainly.com/question/8591226

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